1995 BONNEVILLE WITH 198,000 MILES NEEDS ENGINE WORK - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-27-2003, 06:26 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Jan 2003
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
RZJNVB is on a distinguished road
Default 1995 BONNEVILLE WITH 198,000 MILES NEEDS ENGINE WORK

I purchased this car new and the exterior and interior are in perfect condition.

I'm starting to loose water but can't find a leak? The engine is running rough when for the first few minutes than smooths out. I'm planning to keep this car as my everyday driver and purchase a corvette for a weekend car. I need some advice as to what to do .... do I purchase a remanufactured engine or fix the current one?

I had a problem with the intake manifold back around 100,000 miles and had it fixed ... I never replaced the timing chain yet either.

What would you recommend to keep my rod on the road?
timing chain replacement,valve job and timing chain?

Or purchase another engine.

I appreciate any information you could provide .... Thanks!
RZJNVB is offline   Reply With Quote
Old 01-27-2003, 06:45 PM   #2
Senior Member
Certified GM nut
 
Join Date: Aug 2002
Location: Kalamazoo, MI
Posts: 1,838
Thanks: 0
Thanked 0 Times in 0 Posts
95BonnevilleSESC is on a distinguished road
Default

I take that you have a Series II NA engine because you stated that you replaced the upper intake at about 100K. If you are loosing coolent, there are two places that are most common: the intake (which could account for a rough idle at startup) and the water pump (check for seeping--both cold and hot engine). The plastic intake has been a problem since day one--and GM has not fixed the problem. In essense, the intake you replaced 98K ago is probably leaking again. These engines are very well designed--with the exception of the intake problem. You could go either way on this one, but, if you purchase a used engine, you are purchasing a used intake manifold. If you purchase a new or remanufactured engine, you are spending more $ than you would if you simply replaced the intake.

You have owned this car since new, therefore you know how it was taken care of. I would recommend replacing the intake and then investing in a 180 degree t-stat to help prolong the life of your new intake. If, however, you feel that you have abused this car for the last 200K and don't think it will last much longer, you may wish to go an engine swap.

Good luck in your decision.

Tim

PS. Welcome to the Club.
95BonnevilleSESC is offline   Reply With Quote
Old 01-27-2003, 09:47 PM   #3
Senior Member
Certified GM nut
 
Join Date: Sep 2002
Location: Eden Prairie, MN
Posts: 1,728
Thanks: 0
Thanked 0 Times in 0 Posts
zzzzzeke is on a distinguished road
Default

Most likely it'* your plastic plenum. Try taking off your airbox and looking into through the MAF screen. The leak is probably going to be there. If you can see it possibly try taking off the plenum and look for cracks or wreaked seals. My dad is an ASE certified tech and thats what we had to fix on my car. It was right around 100,000 when it happened. He recently had a 95 n/a in the shop with the same problem. This seems to be a very common problem with the 3800. GM obviously hasn't fixed the problem because there was also a 2001 in the shop with the exact same problem....
zzzzzeke is offline   Reply With Quote
Old 01-27-2003, 11:06 PM   #4
Senior Member
Posts like a Camaro
 
Join Date: Jan 2002
Location: Simi Valley, CA
Posts: 971
Thanks: 0
Thanked 1 Time in 1 Post
99BonnevilleSE is on a distinguished road
Default

Well if your engine has 198,000 miles, you can buy a Series II engine with low miles for about 2k that includes engine/tranny/ecu/wiring harness. In the long run it would probably be nicer just to swap that in and the car will keep going.

jr's3800, and aluminum replacement would cost alot. I could have one made but it would not be cheap.
99BonnevilleSE is offline   Reply With Quote
Old 01-28-2003, 12:17 AM   #5
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Let'* not forget the Series 1 can have a similar problem. Josh'* 93SSE had the mysterious coolant loss. 50% was going into a failed seal between the upper and lower intakes, and the other 50% was going into cylinder #6 from the head gasket. The Series 1 upper intakes aren't as crack-prone as the Series 2, but the seals are still a problem. If you pull the upper intake off, you'll see where the leak is. A clean runner on the lower intake is an indication of liquid. Water injection has it'* benefits! Jseabert'* #3 lower intake runner was clean as a whistle, as well as the head ports and cylinder somewhat, and cylinder #6 was too, but not the #6 intake port in the head.
willwren is offline   Reply With Quote
Old 01-28-2003, 01:23 AM   #6
Senior Member
Posts like a Camaro
 
Join Date: Jan 2002
Location: Simi Valley, CA
Posts: 971
Thanks: 0
Thanked 1 Time in 1 Post
99BonnevilleSE is on a distinguished road
Default

Quote:
Originally Posted by jr's3800
99SE, I guess in that case I will just stay with the flawed plastic upper intake..... Shame on GM for that intake...
I agree, but I think GM ironed out alot of the bugs in Bonneville'* by 99. My car has had no problems and I have taken it apart and it shows no sign of in danger of the intake leak.
99BonnevilleSE is offline   Reply With Quote
Old 01-30-2003, 06:24 AM   #7
Member
Posts like a V-Tak
 
Join Date: Nov 2002
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Bdd8591 is on a distinguished road
Default Coolant loss

RZ, I had same problem. It was upper intake gasket #6 cylinder. I replaced it and problem went away. It took total of 6hrs for me to do the work. By the way mine has 218,000 miles. Good luck
Bdd8591 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
72,000 miles needs a face lift jagergirll 1987-1991 3 03-27-2010 04:17 PM
Low Engine Knock @ 140,000 Miles dougworner 1992-1999 7 10-05-2008 07:57 PM
The ~$3,000,000 Bonneville Hans Lounge 7 01-25-2006 01:39 PM
NAPA WHOARGE (56,000,000,000 is not good) Kennginn Your Ride: GM Pictures & Videos 12 04-21-2004 10:22 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 09:25 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.