Upper & Lower Intake Gaskets Toast Failure waiting w/pic
#1
Senior Member
Certified GM nut
Thread Starter
Upper & Lower Intake Gaskets Toast Failure waiting w/pic
Thank you to everyone on the BC who insisted I do the lower gaskets when changing
my upper plenum.
I finished the job today.
Here is what I found:
*Lower gaskets were literally falling apart.
*Oil ponding in the left rear and right front of lower.
*Upper gasket flattened on throttle body and leaking.
*Egr tube stuck and burnt to upper plenum.
The hardest part was cleaning everything and getting the fuel rail out.
It would only budge after I soaked the injector bodies with oil then continued rocking it.
Coolant elbow was a little tricky.
I will be updating this post with pics shortly.
I concluded the job with an oil and filter change and she'* ready to go.
To everyone out there that is thinking of changing their gaskets and plenum as a preventative measure "Do it". You won't be sorry you did.
I'd rather pay a little now than a lot later.
see?
my upper plenum.
I finished the job today.
Here is what I found:
*Lower gaskets were literally falling apart.
*Oil ponding in the left rear and right front of lower.
*Upper gasket flattened on throttle body and leaking.
*Egr tube stuck and burnt to upper plenum.
The hardest part was cleaning everything and getting the fuel rail out.
It would only budge after I soaked the injector bodies with oil then continued rocking it.
Coolant elbow was a little tricky.
I will be updating this post with pics shortly.
I concluded the job with an oil and filter change and she'* ready to go.
To everyone out there that is thinking of changing their gaskets and plenum as a preventative measure "Do it". You won't be sorry you did.
I'd rather pay a little now than a lot later.
see?
#3
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Posts like a Turbo
Join Date: Apr 2004
Location: Sheridan Wyoming
Posts: 210
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"Ditto" Good Job. Now you can have more peace of mind, huh !
Thanks very much for letting us all know what you found. Very good "first hand" information. Many many many other forum readers should be very thankful for this good information.
Thanks very much for letting us all know what you found. Very good "first hand" information. Many many many other forum readers should be very thankful for this good information.
#4
Senior Member
Certified GM nut
Thread Starter
gaskets
The guy at Advance Auto said he handles suppyling most shops with these gaskets
and he can't keep them in stock.
Also when I picked up the coolant elbow at the dealer my service manager friend said they do not do this repair on cars over 50k without pulling the oil pan and cleaning the screen and pan.
He said coolant and sludge from cleaning gaskets and the lifter area getting down in the pan poses a problem.
When I removed my lower everything was clean and I was careful to plug the holes
and cover the lifter area with towels when cleaning the gaskets.
Oil drained showed no antifreeze or dirt so I think I'm OK.
Also notice the coffee filter in my funnel in the coolant overflow. Its a good idea when reinstalling your antifreeze to use this when you get near the bottom of the pan and there is some loose stuff in there floating around.
and he can't keep them in stock.
Also when I picked up the coolant elbow at the dealer my service manager friend said they do not do this repair on cars over 50k without pulling the oil pan and cleaning the screen and pan.
He said coolant and sludge from cleaning gaskets and the lifter area getting down in the pan poses a problem.
When I removed my lower everything was clean and I was careful to plug the holes
and cover the lifter area with towels when cleaning the gaskets.
Oil drained showed no antifreeze or dirt so I think I'm OK.
Also notice the coffee filter in my funnel in the coolant overflow. Its a good idea when reinstalling your antifreeze to use this when you get near the bottom of the pan and there is some loose stuff in there floating around.
#6
Senior Member
Posts like a Camaro
did you get any pics of the egr stovepipe that goes from the lower to the upper?
i have another theory coming about in my mind, that'* unsupported by anything i've found out and posted in other threads...
i have another theory coming about in my mind, that'* unsupported by anything i've found out and posted in other threads...
#7
Re: throttle plate
Originally Posted by SSEBONNE4EVA
Also the back of the throttle plate was filthy and required a lot of cleaning.
#9
Senior Member
Certified GM nut
Thread Starter
forgot
Dawg.... The one thing I forgot to do was drill my stat. when I had it apart.
Would have helped if I made a check list.
You get caught up in the moment when everthing is apart.
Would have helped if I made a check list.
You get caught up in the moment when everthing is apart.
#10
Senior Member
Certified GM nut
Thread Starter
Mileage
Hey Guys,
Got a welcome surprise to report.
Since doing this Plenum and gasket job my gas mileage has been steadily increasing
to where I got 29 MPG going to the beach on Tuesday.
Could this be because the PCV and MAF are now working properly since sealing everything up?
Got a welcome surprise to report.
Since doing this Plenum and gasket job my gas mileage has been steadily increasing
to where I got 29 MPG going to the beach on Tuesday.
Could this be because the PCV and MAF are now working properly since sealing everything up?