| Olga is ill - input please [message #241843] |
Sat, 01 March 2014 04:59  |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Having problems with dear Olga
She lost power and oilpressure seemed low
Changed oilpressure sender to be sure it is correct
Oilpressure 45psi cold falling to 15psi hot and lower cruising does not pickup with accelerating
Vacuum 23 psi idle
It seems she pulls better at startup losing power as oil heats up
loosing pressure at valves? getting noisy at valve train rear
Obvious to change oilpump, just hoping to avoid pulling tranny
Will take of old oilcooler hoses ( maybe expanding at pressure?)
Just run it without oilcooler for a bit
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Olga is ill - input please [message #241849 is a reply to message #241843] |
Sat, 01 March 2014 07:12  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I do not have the solution to your problem. These are just some thoughts.
1. Smell oil and see if it smells like gasoline or anti-freeze. I'm thinking oil dilution (thin oil). A fuel pump leak or head gasket leak could cause these.
2. You might think about changing the oil and filter to see if it makes any difference. Also cut the removed oil filter open and examine what was trapped by the filter element inside.
3. When changing the oil, capture a sample of the removed oil and send it if for an oil analysis. Most truck stops can help with this. If not, then mail it to Blackstone labs in Ft Wayne, Indiana plus $25.00 USD. They are on the Internet.
4. There is a bypass built into the oil filter adapter that, if it is working correctly, should bypass the oil when there is a restriction in the oil filter, oil cooler, or the lines going to between them. I'm not saying do not check them, I just saying that I doubt that is your problem.
5. Dropping the trans is no big deal if the fender liners are removed. Two of us dropped mine in a little over an hour working on a concrete floor. I'm not sure if dropping the trans is what you want to do.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Olga is ill - input please [message #241852 is a reply to message #241843] |
Sat, 01 March 2014 07:43 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Right Bob that was what I planned on doing. It is easy ( always start with easy things firsth) and I have new oillines ready to mount later on.
Will do that tomorrow ( is afternoon here)
I did change the oil and filter, opened the filter and all was nice and clean. electric fuelpumps, no leaks
As vacuum is high 23 and stabil, cylinders should be alright
She was driving as a dream ( tears in my eyes) after we redid the distributor
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Olga is ill - input please [message #241856 is a reply to message #241855] |
Sat, 01 March 2014 08:19 |
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Loffen
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
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Good point Ken, how is the distributor shaft to the oil pump ?
(Had to edit, bad gear bad spark.. )
1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green,
And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel
in Norway
[Updated on: Sat, 01 March 2014 08:20] Report message to a moderator |
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| Re: Olga is ill - input please [message #241857 is a reply to message #241843] |
Sat, 01 March 2014 08:27 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Grab the timing light and check initial, and that centrifugal and vac advance are A OK. Just to rule it out. Looking for easy fixes first. Choke and Thermac are wide open? Wet air filter won't pass air? That would be worse once warm. Failed or internal restricted muffler(s) would cause power loss as well and restricted flow could cause ticking leak at high pressure. Good luck.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Olga is ill - input please [message #241858 is a reply to message #241856] |
Sat, 01 March 2014 08:31 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| Loffen wrote on Sat, 01 March 2014 08:19 |
Good point Ken, how is the distributor shaft to the oil pump ?
(Had to edit, bad gear bad spark.. )
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The oil pump has a 6 sided shaft that goes in the bottom of the distributor. I believe is 5/16". I normally would not mention it but since he was just in there I suggest that he look at it again.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Olga is ill - input please [message #241860 is a reply to message #241843] |
Sat, 01 March 2014 09:09 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Thanks for all the input !
Olga was running very fine after we did the distributor
The shaftdrive either works or does not , right?
I see oilpressure( new sender and gauge), just not enough ( to lift the valves?)
We checked timing today, reacts on vacuum ( new modulator) and new pins, spring and modulator freshly greased
new airfilter ( what could that do to oilpressure?)
Newly cleaned, new edelbrock carb seems to work fine
Do not know about muflers
There is this nocking at the rear of engine-top under load
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Olga is ill - input please [message #241861 is a reply to message #241843] |
Sat, 01 March 2014 09:13 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Oh yes
what will it do to oil level when I take out the oil cooler?
Would it need adjusting?
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Olga is ill - input please [message #241863 is a reply to message #241843] |
Sat, 01 March 2014 09:35 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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What's in the pan is in the pan. You are just removing the external loop. Could the dipstick tube be collapsed and giving a higher false? If you just changed and put in 5 in that should rule that out Check and check often while this is under investigation.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Olga is ill - input please [message #241867 is a reply to message #241863] |
Sat, 01 March 2014 10:35 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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all right
tomorrow i will do the cooler lines, if that does not help I will take out the distributor and have a look at those gears
Next would be oilpump?
I added 5,5 quarts all the way op to full on the stick
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: [GMCnet] Olga is ill - input please [message #241875 is a reply to message #241867] |
Sat, 01 March 2014 10:50 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Lenze, a sudden loss of oil pressure in an engine usually is the bearer of
bad tidings, especially when accompanyied by ominous knocking sounds from
within the engine. If you just did an oil change and oil filter change and
this happened, and all was well with the engine before you did this, It
would lead me to investigate things like the correct viscosity oil and
correct oil filter used for the change. I personally do not think r & r the
distributor would affect oiling in the way you describe. If you failed to
engage the oil pump drive shaft, you would have zero oil pressure or flow,
not low pressure. If it were me with the problem, I would change both oil
and filter with a heavier viscosity oil, and see if any change is apparent.
If not, it is time to bite the bullet and pull the engine before it is
unrepairable at reasonable cost. Just what I would do.
Jim Hupy
Salem, Or
78 GMC Royale 403
On Mar 1, 2014 8:35 AM, "lenze middelberg" <lenze@middelberg.dk> wrote:
>
>
> all right
>
> tomorrow i will do the cooler lines, if that does not help I will take out
> the distributor and have a look at those gears
> Next would be oilpump?
>
> I added 5,5 quarts all the way op to full on the stick
> --
> Appie
> eleganza 76 "Olga" ( pictures at
> http://www.gmcmhphotos.com/photos/g6489-olga.html
> Volvo v70
> Denmark
> _______________________________________________
> GMCnet mailing list
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| Re: [GMCnet] Olga is ill - input please [message #241876 is a reply to message #241875] |
Sat, 01 March 2014 11:03 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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problem was there before oil change oilchange was due and I wanted to make sure the oil was clean ( witch it was)
Always difficult to place noise but seems to come from rear valve area
Will take of the covers before the tranny
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Olga is ill - input please [message #241878 is a reply to message #241870] |
Sat, 01 March 2014 11:08 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| A Hamilto wrote on Sat, 01 March 2014 11:44 |
| appie wrote on Sat, 01 March 2014 10:35 |
all right
tomorrow i will do the cooler lines, if that does not help I will take out the distributor and have a look at those gears
Next would be oilpump?
I added 5,5 quarts all the way op to full on the stick
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When Ken Henderson bent/broke a rocker arm, his oil pressure dropped. Could it be a collapsed lifter or something about the lifters or pushrods or rockers?
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Appie,
I have been pondering this since you first posted.
If you have damage to the valve gear, then a distinct miss would be heard at idle. You have not mentioned any miss.
If there is damage to the valve gear, performance will be poor, but idle vacuum will usually also be poor. Yours is not.
If you broke one rocker arm, that can release a lash adjuster (lifter) and you may loose lube oil pressure. Often the lash adjusters "blow up" (meaning all the little part inside - leave) and the lash adjuster becomes an internal lube oil leak. This would be most pronounced when the engine was warm, but so would the missing cylinder power.
If a cranking compression (not a good test for much) does not show one strange cylinder, I (if it were my coach) would remove the valve gear covers because this is much simpler than removing the oil pan. A failed exhaust rocker can avoid showing up on a cranking compression.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Olga is ill - input please [message #241881 is a reply to message #241878] |
Sat, 01 March 2014 11:36 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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Thanks Matt
She runs very nice and quite at idle
Only when driving accelerating a nock apeers but not on decalerating.
She seemed all right for the first couple of hundred meters then power went down as she heated op from 90C at idle to 100 C thermostat is 195 witch is 90C
As temp sender is new I do not know what it was before ( oh yes a quarter on the old system)
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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