2000 Pontiac Grand Prix GT Blown Upper Intake Gasket? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Pontiac When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-01-2016, 06:35 AM   #1
Junior Member
Thread Starter
 
Join Date: May 2016
Posts: 3
Thanked 0 Times in 0 Posts
Bashula is on a distinguished road
Question 2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?

I have a 2000 Pontiac Grand Prix with a little more than 157K miles and I have a problem when I get under the hood and oil is everywhere. The car will lose oil over a couple of months due to leaking of some of the Gaskets I was thinking upper intake Gasket I originally thought it was the oil pan leaking because there was so much oil down there but it looked like it was coming from the top I just wanted someone elses opinion.
Attached Thumbnails
2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?-20160430_205010.jpg   2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?-20160430_205005.jpg   2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?-20160430_204957.jpg   2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?-20160430_203526.jpg   2000 Pontiac Grand Prix GT Blown Upper Intake Gasket?-20160430_203519.jpg  


Last edited by Bashula; 05-01-2016 at 06:38 AM.
Bashula is offline   Reply With Quote
Old 05-01-2016, 09:20 AM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Change them both out, upper and lower gaskets.
Mike is offline   Reply With Quote
The Following 3 Users Say Thank You to Mike For This Useful Post:
Bashula (05-01-2016), Tech II (05-01-2016), WilliamE (05-01-2016)
Old 05-01-2016, 10:46 AM   #3
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,149
Thanked 784 Times in 613 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

Oil seeping from that area is common....so are valve covers, oil pan gaskets, and the oil sending unit.....

I would wash down the upper plenum area, the valve covers and the oil pan, and like I said the area of the oil sending unit(just above the oil filter towards the rear of the engine), to find the main culprit of all that oil leaking.....

With that kind of mileage, you can have several leaks......if you decide to do the upper plenum gasket, like Mike suggests, you should probably do the lower intake gaskets to avoid potential coolant problems......and while you have the upper plenum off, inspect the upper plenum where the EGR tube passes through for degradation.....you have a coolant passage there and if that plastic is starting to melt, you will need to replace the upper plenum....

I have to laugh, when the original problem showed up with the upper plenum, the GM TSB wanted you to replace the upper plenum, AND replace the lower intake with a new design that had a smaller stovepipe....Dorman was the first to come out, I think, with a new upper plenum kit that had a replaceable stovepipe(smaller diameter) and larger plenum opening....
Tech II is offline   Reply With Quote
The Following 3 Users Say Thank You to Tech II For This Useful Post:
Bashula (05-01-2016), Mike (05-01-2016), WilliamE (05-01-2016)
Old 05-01-2016, 11:03 AM   #4
Junior Member
Thread Starter
 
Join Date: May 2016
Posts: 3
Thanked 0 Times in 0 Posts
Bashula is on a distinguished road
Default

OK, thanks I will take a look. I'll buy the upper and lower Gaskets and o rings and stuff to fix that. I will check the EGR tube i'll write back what I find out.



Thanks, Bryan
Bashula is offline   Reply With Quote
Old 05-01-2016, 01:17 PM   #5
Junior Member
Thread Starter
 
Join Date: May 2016
Posts: 3
Thanked 0 Times in 0 Posts
Bashula is on a distinguished road
Default

I just took the throttle off the car and it had black sluge that has build on to it like it was burning oil. Would a Intake leak do that ? Sorry if it sounds like a dumb question kinda new to working on cars.
Bashula is offline   Reply With Quote
Old 05-01-2016, 03:11 PM   #6
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,149
Thanked 784 Times in 613 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

On the throttle plate and bore? No that'* an accumulation over time.......should be removed though.......

With the throttle body off, look inside at the depressions of the lower intake....if filled with coolant, that upper plenum is leaking...
Tech II is offline   Reply With Quote
The Following User Says Thank You to Tech II For This Useful Post:
Mike (05-01-2016)
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2000 Pontiac Grand Prix GTP Daytona 500 Pace Car - One of 140 flyballdog Lounge 1 06-19-2011 09:50 PM
How can I diagnose a blown head gasket? Maybe LIM gasket? rstrunk 1992-1999 6 03-15-2009 10:24 PM
Upper and lower intake gasket a diaster! Spiral 1992-1999 10 05-18-2004 03:28 AM
guys, advice needed..upper manifold or gasket blown srgetz 1992-1999 18 01-17-2004 12:25 PM
Cracked upper inake, or bad intake gasket? brminder 1992-1999 2 03-24-2003 07:37 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:32 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.