Home » Public Forums » GMCnet » Intake manifold replacement (foreign car mechanic amazement)
| Intake manifold replacement [message #343705] |
Mon, 27 May 2019 00:00  |
Jack Ramsey
Messages: 82
Registered: December 2012
Location: Tulare, CA
Karma: 1
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I am finally replacing the Intake manifold, (had some health issues last year and put it off until my head was clear), and I am AMAZED at the whole belt-alignment-tightening-pulley-bracket system. Seems like the team took some LSD and then went on a crosstop run for 3 weeks and decided to mash it all together. The amazing part is 44 years later it still works and is reliable. I'm impressed any previous owners didn't lose any parts, and from the number of homemade shims made out of larger nuts, it has been disassembled previously.
All is going well, noticed the alternator has been replaced with a Delco Remy (took a 15mm wrench to remove it, and it had a 8mm electrical positive terminal nut). The AC compressor bracket lower nut is not wanting to come off, and there is some sort of "lock nut" under it. There is also a strange loop metal bracket, that I think had a couple of springs attached to it for throttle return. Pretty cobbled up, and a WHOLE lot if intake leaks from open air hoses not plugged. amazing it ran as well as it did. I probably will be pleasantly surprised when I put the atomic TBI on it.
Anyone know about the lower AC bracket nut and what it screws into before I take some heat to it tomorrow morning?
Thanks,
Jack
http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66433-lower-nut.html
Jack Ramsey
Tulare, CA
TZE165V101526
1975 Palm Beach
[Updated on: Mon, 27 May 2019 00:14] Report message to a moderator |
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| Re: Questions:Intake manifold replacement no intake gasket [message #343738 is a reply to message #343705] |
Mon, 27 May 2019 20:27  |
Jack Ramsey
Messages: 82
Registered: December 2012
Location: Tulare, CA
Karma: 1
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Member |
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NO intake gasket except the turkey tray, large amount of gunk in the water jackets, orange silicone in the oil galley, RUSTED intake bolts.
I am thinking clean up the turkey tray, possibly not replace it, clean everything up as much as I can, install fixed stock intake with Jim K gaskets and block of plates, intake from Jim K also, fill the exhaust crossover with Moroso engine block filler, just in case, install the Jim K supplied Atomic FI and run it for a couple of weeks. THEN pull the radiator and send it out, while replacing the 20 yr old water pump and checking the timing chain sprocket at the same time. No sense in putting in a new water pump with the amount of gunk from 20 yrs of sitting swirling up and stirring up the mess.
I see from YouTube, some people think the front and rear intake to block gaskets should not be used. Any thoughts? Am I thinking OK? I have never see this amount of gunk in a cooling system. Since I am an old air cooled mechanic, I think it is important to think about thermal expansion of the bolts. I am probably overthinking simple stuff. get new intake grade something? bolts, torque them down and move on. Have to improvise a little on the threaded pieces holding down the myriad of assorted brackets for cooling shroud and rest of system.
Turkey tray overall mess:
http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66439-turkey-tray.html
Water Jacket Gunk:
http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66440-water-jacket-gunk.html
Edelbrock no gasket:
http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66442-edelbrock-no-gasket.html
Thanks,
Jack
Jack Ramsey
Tulare, CA
TZE165V101526
1975 Palm Beach
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| Re: [GMCnet] Questions:Intake manifold replacement no intake gasket [message #343743 is a reply to message #343738] |
Tue, 28 May 2019 09:14 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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In my opinion, ditch the turkey tray and use Dick Paterson’s intake gaskets
with stainless steel exhaust crossover block-off plates, following his
sealing instructions.
Remove and meticulously vacuum out the silicone bits. Don’t leave any
silicone bits anywhere.
The turkey tray is there to keep oil from splashing up and coking in the
hot exhaust crossover passage of the manifold. With block-off plates, it
won’t be that hot.
The crossover is for carb heating, which we simply don’t need.
You’ll need to install an electric choke.
If the bolts just have surface rust, i would probably wire-brush and reuse
the. If the corrosion has eroded them, replace.
Use a wide RTV bead to seal the end gaps, instead of the gasket-kit rubber
things. Be sure that gasket surfaces are carefully degreased before
applying sealant.
Check port alignment to make sure you have good and wide gasket compression
around the water jackets.
Tighten the bolts to half torque, and let the sealant cure overnight, if
possible. Then tighten to full torque, noting the order in the maintenance
manual.
I bet you’ll need a new thermostat. Make sure the thermostat neck seats and
tightens properly. I’ve had issue with this.
Rick “and fresh fluids, of course” Denney
On Mon, May 27, 2019 at 9:42 PM Jack Ramsey via Gmclist <
gmclist@list.gmcnet.org> wrote:
> NO intake gasket except the turkey tray, large amount of gunk in the water
> jackets, orange silicone in the oil galley, RUSTED intake bolts.
>
> I am thinking clean up the turkey tray, possibly not replace it, clean
> everything up as much as I can, install fixed stock intake with Jim K
> gaskets
> and block of plates, intake from Jim K also, fill the exhaust crossover
> with Moroso engine block filler, just in case, install the Jim K supplied
> Atomic FI and run it for a couple of weeks. THEN pull the radiator and
> send it out, while replacing the 20 yr old water pump and checking the
> timing
> chain sprocket at the same time. No sense in putting in a new water pump
> with the amount of gunk from 20 yrs of sitting swirling up and stirring up
> the mess.
>
> I see from YouTube, some people think the front and rear intake to block
> gaskets should not be used. Any thoughts? Am I thinking OK? I have never see
> this amount of gunk in a cooling system. Since I am an old air cooled
> mechanic, I think it is important to think about thermal expansion of the
> bolts.
> I am probably overthinking simple stuff. get new intake grade something?
> bolts, torque them down and move on. Have to improvise a little on the
> threaded pieces holding down the myriad of assorted brackets for cooling
> shroud and rest of system.
>
> Turkey tray overall mess:
>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66439-turkey-tray.html
>
> Water Jacket Gunk:
>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66440-water-jacket-gunk.html
>
> Edelbrock no gasket:
>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66442-edelbrock-no-gasket.html
>
> Thanks,
>
> Jack
>
> --
> Jack Ramsey
> Tulare, CA
> TZE165V101526
> 1975 Palm Beach
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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| Re: [GMCnet] Questions:Intake manifold replacement no intake gasket [message #343744 is a reply to message #343743] |
Tue, 28 May 2019 09:28 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Call as we have All the parts including the special choke wire connector
and will advise you on the hook up and adjustment .
On Tue, May 28, 2019 at 7:15 AM Richard Denney via Gmclist <
gmclist@list.gmcnet.org> wrote:
> In my opinion, ditch the turkey tray and use Dick Paterson’s intake gaskets
> with stainless steel exhaust crossover block-off plates, following his
> sealing instructions.
>
> Remove and meticulously vacuum out the silicone bits. Don’t leave any
> silicone bits anywhere.
>
> The turkey tray is there to keep oil from splashing up and coking in the
> hot exhaust crossover passage of the manifold. With block-off plates, it
> won’t be that hot.
>
> The crossover is for carb heating, which we simply don’t need.
>
> You’ll need to install an electric choke.
>
> If the bolts just have surface rust, i would probably wire-brush and reuse
> the. If the corrosion has eroded them, replace.
>
> Use a wide RTV bead to seal the end gaps, instead of the gasket-kit rubber
> things. Be sure that gasket surfaces are carefully degreased before
> applying sealant.
>
> Check port alignment to make sure you have good and wide gasket compression
> around the water jackets.
>
> Tighten the bolts to half torque, and let the sealant cure overnight, if
> possible. Then tighten to full torque, noting the order in the maintenance
> manual.
>
> I bet you’ll need a new thermostat. Make sure the thermostat neck seats and
> tightens properly. I’ve had issue with this.
>
> Rick “and fresh fluids, of course” Denney
>
> On Mon, May 27, 2019 at 9:42 PM Jack Ramsey via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> NO intake gasket except the turkey tray, large amount of gunk in the
> water
>> jackets, orange silicone in the oil galley, RUSTED intake bolts.
>>
>> I am thinking clean up the turkey tray, possibly not replace it, clean
>> everything up as much as I can, install fixed stock intake with Jim K
>> gaskets
>> and block of plates, intake from Jim K also, fill the exhaust crossover
>> with Moroso engine block filler, just in case, install the Jim K supplied
>> Atomic FI and run it for a couple of weeks. THEN pull the radiator and
>> send it out, while replacing the 20 yr old water pump and checking the
>> timing
>> chain sprocket at the same time. No sense in putting in a new water pump
>> with the amount of gunk from 20 yrs of sitting swirling up and stirring
> up
>> the mess.
>>
>> I see from YouTube, some people think the front and rear intake to block
>> gaskets should not be used. Any thoughts? Am I thinking OK? I have never
> see
>> this amount of gunk in a cooling system. Since I am an old air cooled
>> mechanic, I think it is important to think about thermal expansion of the
>> bolts.
>> I am probably overthinking simple stuff. get new intake grade something?
>> bolts, torque them down and move on. Have to improvise a little on the
>> threaded pieces holding down the myriad of assorted brackets for cooling
>> shroud and rest of system.
>>
>> Turkey tray overall mess:
>>
>>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66439-turkey-tray.html
>>
>> Water Jacket Gunk:
>>
>>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66440-water-jacket-gunk.html
>>
>> Edelbrock no gasket:
>>
>>
> http://www.gmcmhphotos.com/photos/atomic-tbi-fuel-injection/p66442-edelbrock-no-gasket.html
>>
>> Thanks,
>>
>> Jack
>>
>> --
>> Jack Ramsey
>> Tulare, CA
>> TZE165V101526
>> 1975 Palm Beach
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Intake manifold replacement [message #343761 is a reply to message #343705] |
Tue, 28 May 2019 13:03 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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First of all, the Atomic FI doesn't need a choke wire, it gots no choke - the internal computer senses temperature and supplies a mixture accordingly. Second, when Mr. John did mine he ran about an 8th inch bead of Ultimate Gray sealer along the front and back block edges, which were spotless. About twenty minutes later he and his assistant CAREFULLY lowered the manifold in place and torqued it down. This resulted in a very small bead appearing all along the seam which he checked to make sure there were no voids. I think it will last easily.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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