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

98 pontiac grand prix gt 3.8 engine problems

Thread Tools
 
Search this Thread
 
Old 12-08-2011, 02:16 PM
  #11  
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 29 Likes on 25 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Check the UIM. There are 2 coolant passages that go up to the throttle body, and the EGR goes between them. This area cracks and leaks. There are two ways to fix this. Replace the UIM, or block off the coolant passages. I tap the ports in the LIM and put 1/4" pipe plug in. Make those flush. I found if you pull the rubber from the gasket for those passages, fill with red RTV, and put 2 nickels there. It will seal real good. Put the UIM in place, snug it up. Wait about a hour, then torque down.
Old 12-20-2011, 01:05 PM
  #12  
Junior Member
Thread Starter
 
Horseman12's Avatar
 
Join Date: Nov 2011
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Horseman12 is on a distinguished road
Default

I got water in different cylinder now
Old 12-20-2011, 01:07 PM
  #13  
Junior Member
Thread Starter
 
Horseman12's Avatar
 
Join Date: Nov 2011
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Horseman12 is on a distinguished road
Default

I had the head redone & pressure check as well & still got water
Old 12-20-2011, 04:23 PM
  #14  
Junior Member
Thread Starter
 
Horseman12's Avatar
 
Join Date: Nov 2011
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Horseman12 is on a distinguished road
Default

I even remaned the heads & still got hydro lock

Its is not in the same cylinders though any suggestions?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
99gtpowner
Pontiac
5
08-12-2011 11:29 AM
stb4224
General GM Chat
6
11-20-2005 05:36 PM
killer_cr80r
Lounge
17
09-02-2004 11:18 AM
killer_cr80r
Lounge
1
09-01-2004 08:02 PM
ridic2002
General GM Chat
14
03-18-2003 03:46 PM



Quick Reply: 98 pontiac grand prix gt 3.8 engine problems



All times are GMT -4. The time now is 08:25 AM.