Home » Public Forums » GMCnet » OIL CONSUMPTION
| OIL CONSUMPTION [message #117938] |
Mon, 07 March 2011 22:40  |
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jaholland
Messages: 565
Registered: June 2010
Location: Sweet Home Alebamy
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Today I stopped at Exit 287 On I-65 S and fueled up with 100% GASOLENE at Logan's Country Store ~
As I was exiting at exit 262 it seemed that my power brakes were not working -
I stopped at Flying J to check air pressure in the tires and while checking various liquids
I noticed that the oil was 2 quarts low so I added the 2 needed quarts
{ 2 quarts in 25 miles }-
21 miles later I was home and checked the Oil to find it 2 quarts low again -
No Smoke - No Visible Oil Leaks - No Blow by -
It is the 1st time for this to happen on my 403 -
I have a funeral @ 11 AM tomorrow in Union City TN and will check the GMC out when we get back -
I'm Puzzeled - Other than vacuum lines, what else should I check ?
~ Joe ~
/_]*[__][] *[__|] ~ * '73 TZE063V101887 "
"
O----------OO--]* ~ '78 TZE168V100234 "
"
" Joe & Lavelle " "
"
'sweet home alebamy'
[Updated on: Mon, 07 March 2011 22:43] Report message to a moderator |
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| Re: [GMCnet] OIL CONSUMPTION [message #117940 is a reply to message #117939] |
Mon, 07 March 2011 23:11  |
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jaholland
Messages: 565
Registered: June 2010
Location: Sweet Home Alebamy
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I have noticed nothing different and everything checked out in Nashville.
When I filled up at Exit 287 the Oil level was normal, Water Temp on the cool
side and was cruising @ 65 mph. I only stopped @ Exit 262 to check the pressure
in the tires added oil there and watched the oil pressure and the mirrors from
there til I got home -
No Oil Smoke even at full throttle ~
Added oil, checked oil cooler lines, oil pan, Timing Chain Cover and oil filter for leaks `
~ Joe ~
/_]*[__][] *[__|] ~ * '73 TZE063V101887 "
"
O----------OO--]* ~ '78 TZE168V100234 "
"
" Joe & Lavelle " "
"
'sweet home alebamy'
[Updated on: Mon, 07 March 2011 23:13] Report message to a moderator |
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| Re: OIL CONSUMPTION [message #117943 is a reply to message #117938] |
Tue, 08 March 2011 00:06 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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| bishop1 wrote on Mon, 07 March 2011 20:40 |
Today I stopped at Exit 287 On I-65 S and fueled up with 100% GASOLENE at Logan's Country Store ~
As I was exiting at exit 262 it seemed that my power brakes were not working -
I stopped at Flying J to check air pressure in the tires and while checking various liquids
I noticed that the oil was 2 quarts low so I added the 2 needed quarts
{ 2 quarts in 25 miles }-
~ Joe ~
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Joe,
The power booster on the brakes makes me think low vacuum which makes me think intake manifold leak. If it is on the valley(inside the engine) side, it can suck oil. That much oil will show up on the plug/s. I suggest pulling the plugs to see if any are fouled or oily.
If not, pull the PVC (Goes to the top of the right valve cover) valve at the carb and see if there is oil in it.
What does the tail pipe look like. The oil, if sucked into one cylinder, can foul a plug to the point that it doesn't really burn the oil, it will just drip watery black junk as the oil is mixed with vapor and heat.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: OIL CONSUMPTION [message #117944 is a reply to message #117938] |
Tue, 08 March 2011 00:27 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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If you are running synthetic oil it will not smoke. If there are no obvious oil leaks then it is time to start pulling spark plugs and see what they look like. After that a compression test is probably next.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] OIL CONSUMPTION [message #117953 is a reply to message #117938] |
Tue, 08 March 2011 07:20 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Joe,
Some good responses so far.
1. Get a good vacuum gauge and make sure it is undampened. Hook it up to a
manifold vacuum source. At idle, watch for fluctuations.
2. You did not indicate what had changed since you used the coach last. If
you changed oil, how much did you refill the engine with? A change with
filter only requires 5 quarts, one quart hides out in the system.
Overfilling always results in rapid burn off of the extra quart.
3. What procedure do you use to check the oil. At idle? Engine stopped
and oil checked after a few minutes delay to permit drain back?
On Mon, Mar 7, 2011 at 9:40 PM, J A Holland <acts238bishop@yahoo.com> wrote:
>
>
> Today I stopped at Exit 287 On I-65 S and fueled up with 100% GASOLENE at
> Logan's Country Store ~ As I was exiting at exit 262 it seemed that my power
> brakes were not working - I stopped at Flying J to check air pressure in the
> tires and while checking various liquids I noticed that the oil was 2 quarts
> low so I added the 2 needed quarts { 2 quarts in 25 miles }-
>
> 21 miles later I was home and checked the Oil to find it 2 quarts low again
> - No Smoke - No Visible Oil Leaks - No Blow by - It is the 1st time for this
> to happen on my 403 -
>
> I have a funeral @ 11 AM tomorrow in Union City TN and will check the GMC
> out when we get back - I'm Puzzeled - Other than vacuum lines, what else
> should I check ?
>
> ~ Joe ~
> --
> Joe & Lavelle
>
> '65 6cyl Cortez/'68 8cyl Cortez/
>
> '73 26' Canyonlands/
>
> http://www.facebook.com/album.php?aid=2056676&id=1266255830&l=7a962eb8eb
>
> '78 26'Eleganza II/
> http://www.facebook.com/album.php?aid=2035030&id=1266255830&l=5536e612f6
>
> _______________________________________________
> GMCnet mailing list
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>
--
Steve Ferguson
Sierra Vista, AZ
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| Re: [GMCnet] OIL CONSUMPTION [message #118097 is a reply to message #117953] |
Tue, 08 March 2011 18:45 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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| Steven Ferguson wrote on Tue, 08 March 2011 07:20 |
Joe,
Some good responses so far.
3. What procedure do you use to check the oil. At idle? Engine stopped
and oil checked after a few minutes delay to permit drain back?
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i find that it takes quite awhile for my 455 to drain back to the pan; more than a gas fillup takes. i also use a qt. every 300 miles. i've finally decided it is burning evenly in all cylinders as all plugs look the same and no leaks. i've done EVERYTHING else to find the source.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] OIL CONSUMPTION [message #118098 is a reply to message #118097] |
Tue, 08 March 2011 18:55 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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| fred v wrote on Tue, 08 March 2011 19:45 |
| Steven Ferguson wrote on Tue, 08 March 2011 07:20 |
Joe,
Some good responses so far.
3. What procedure do you use to check the oil. At idle? Engine stopped
and oil checked after a few minutes delay to permit drain back?
|
i find that it takes quite awhile for my 455 to drain back to the pan; more than a gas fillup takes. i also use a qt. every 300 miles. i've finally decided it is burning evenly in all cylinders as all plugs look the same and no leaks. i've done EVERYTHING else to find the source.
|
Fred: it has been my thinking that a compression test usually tells about valves and with that good, a leak down test would tell what the rings are doing. I don`t know if it is on Auto Zones loaner tool program???
http://www.autozone.com/autozone/accessories/GP-Sorensen-Cylinder-leak-down-tester/_/N-25j0?itemIdentifier=79801_0_0_
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] OIL CONSUMPTION [message #118108 is a reply to message #118098] |
Tue, 08 March 2011 20:03 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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I'm not sure a compression check is a good indicator for oil consumption related issues. The oil rings won't affect compression, nor will worn valve guides or crank ventilation problems.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] OIL CONSUMPTION [message #118137 is a reply to message #118098] |
Tue, 08 March 2011 21:46 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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| C Boyd wrote on Tue, 08 March 2011 18:55 |
| fred v wrote on Tue, 08 March 2011 19:45 |
| Steven Ferguson wrote on Tue, 08 March 2011 07:20 |
Joe,
Some good responses so far.
3. What procedure do you use to check the oil. At idle? Engine stopped
and oil checked after a few minutes delay to permit drain back?
|
i find that it takes quite awhile for my 455 to drain back to the pan; more than a gas fillup takes. i also use a qt. every 300 miles. i've finally decided it is burning evenly in all cylinders as all plugs look the same and no leaks. i've done EVERYTHING else to find the source.
|
Fred: it has been my thinking that a compression test usually tells about valves and with that good, a leak down test would tell what the rings are doing. I don`t know if it is on Auto Zones loaner tool program???
http://www.autozone.com/autozone/accessories/GP-Sorensen-Cylinder-leak-down-tester/_/N-25j0?itemIdentifier=79801_0_0_
|
i made a leakdown tester from this:
http://www.650motorcycles.com/LeakDownTester.html
i haven't used it yet. compression test was 160Lb. on every cyl.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] OIL CONSUMPTION [message #118145 is a reply to message #118108] |
Tue, 08 March 2011 22:16 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| Bob de Kruyff wrote on Tue, 08 March 2011 20:03 |
I'm not sure a compression check is a good indicator for oil consumption related issues. The oil rings won't affect compression, nor will worn valve guides or crank ventilation problems.
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I agree but with that much consumption a compression or leak down test would give a good indication of the overall condition of the cylinder. Notice I suggested the compression test after looking at the plugs. I suspect he will see the problem when he looks at the plugs.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] OIL CONSUMPTION [message #118156 is a reply to message #118148] |
Wed, 09 March 2011 00:28 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I hope it is just a problem of over filling it or a mis-calibrated dipstick. He needs to check the oil level after is has sat over night or at least for an hour or so. Also check the the joint in the dipstick tube has not come apart.
I keep wanting to ask how the new engine is doing but I see it has not moved in several days.
Ken "eagerly awaiting the results of the spark plug inspection."
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] OIL CONSUMPTION [message #118174 is a reply to message #118140] |
Wed, 09 March 2011 07:23 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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| Tim Conway wrote on Tue, 08 March 2011 21:50 |
On Mar 8, 2011, at 7:45 PM, fred veenschoten wrote:
> i also use a qt. every 300 miles.
Would that be what I've seen referred to as an overfill (not
accounting for the oil left in the pan) when doing an oil change? The
quick burn off of a quart, and then back to the normal rate?
Tim Conway
LI NY 78 PB
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no, i said i've done everything; valve seals, stick calibration, PCV valve, different valve covers, fuel mixture.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] OIL CONSUMPTION [message #118175 is a reply to message #118174] |
Wed, 09 March 2011 07:36 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| fred v wrote on Wed, 09 March 2011 07:23 |
| Tim Conway wrote on Tue, 08 March 2011 21:50 |
On Mar 8, 2011, at 7:45 PM, fred veenschoten wrote:
> i also use a qt. every 300 miles.
Would that be what I've seen referred to as an overfill (not
accounting for the oil left in the pan) when doing an oil change? The
quick burn off of a quart, and then back to the normal rate?
Tim Conway
LI NY 78 PB
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No, I said I've done everything; valve seals, stick calibration, PCV valve, different valve covers, fuel mixture.
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I once had an airplane that did that. 4 hours of run time, which equals about 500 miles, and it needed filing up of fuel and 1 quart of oil. I finally pulled all of the cylinders, honed them, and stuck an oil cooler on it. The cylinders were glazed from running too hot. The honing got rid of the glaze and the oil cooler kept it from happening again.
Maybe try sticking an oil cooler on it. I run a 180 thermostat, and have an external oil cooler installed.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] OIL CONSUMPTION [message #118195 is a reply to message #118175] |
Wed, 09 March 2011 11:51 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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Senior Member |
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| Ken Burton wrote on Wed, 09 March 2011 07:36 |
| fred v wrote on Wed, 09 March 2011 07:23 |
| Tim Conway wrote on Tue, 08 March 2011 21:50 |
On Mar 8, 2011, at 7:45 PM, fred veenschoten wrote:
> i also use a qt. every 300 miles.
Would that be what I've seen referred to as an overfill (not
accounting for the oil left in the pan) when doing an oil change? The
quick burn off of a quart, and then back to the normal rate?
Tim Conway
LI NY 78 PB
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No, I said I've done everything; valve seals, stick calibration, PCV valve, different valve covers, fuel mixture.
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I once had an airplane that did that. 4 hours of run time, which equals about 500 miles, and it needed filing up of fuel and 1 quart of oil. I finally pulled all of the cylinders, honed them, and stuck an oil cooler on it. The cylinders were glazed from running too hot. The honing got rid of the glaze and the oil cooler kept it from happening again.
Maybe try sticking an oil cooler on it. I run a 180 thermostat, and have an external oil cooler installed.
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i have a Digipanel but it's hooked to the tranny. i need to put the switch in it and a second sensor for engine oil. i hate throwing money at a problem!
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] OIL CONSUMPTION [message #118224 is a reply to message #118175] |
Wed, 09 March 2011 16:51 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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[Maybe try sticking an oil cooler on it. I run a 180 thermostat, and have an external oil cooler installed.]
A 2nd oil cooler is a good suggestion in mountain terrain but I think the first thing you will notice from hot oil is the front seal will leak badly . The rear seal will also leak from over 250 degree oil. I found out the hard way. I have since added a 2nd cooler and a higher temp rated front seal. When I get motivated I will replace the rear seal with a better seal also.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: OIL CONSUMPTION [message #118333 is a reply to message #117938] |
Thu, 10 March 2011 14:48 |
philipswanson
Messages: 282
Registered: January 2004
Karma: 0
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I had a similar problem. Turned out to be a vacuum leak at the bottom of the inner intake runner. Problem is, many intake gaskets, including the #404 Mr. Gasket set have holes too big for the bolts and the gaskets slide down when installing. The sealing area is only about 5/16" across the runner on the bottom so they will suck oil and you will not see it because it is in the valley. Solution: Pull the intake and check sealing surfaces, especially on the part that sits in the valley. To install new gasket, apply gasket cement, install to block carefully line up runners, and let sit overnight with just the weight of the intake on it, no bolts yet. Bolt on the next day and add you RTV to the front and rear. The gasket won't move. Worked for me and I even gained 2" of vacuum, stopped all oil burning and passed smog much cleaner. It was borderline passing before. Plugs are cleaner too. Runs the same though which is fine.
Phil Swanson
[Updated on: Thu, 10 March 2011 14:50] Report message to a moderator |
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