I have a 1990 Buick LeSabre that has been the best car ever owned. It has
176,000 on it. My wife seen 98 LeSabre for sale. It has 87,000 miles with a 3800 series II engine. We are thinking of upgrading to this car with lower miles, but would like to hear how if this series II is a good at the 3800 we have.
We have one. Aside from the plastic plenum pendejada, it has been a good car. We changed the plenum after a failure a couple of months ago.
The plenum issue is the major problem with that car.
We are going to buy a new car soon, and if you are near us, you might want to look at our car. It is lower mileage, has had the air conditioning computer replaced, has the plenum changed, new struts, etc.
If you stumble in off the street, to a dealership, the cost would be $700-800, most likely. Some stealerships could hump you a lot harder.
I had documented my complaints to Buick a year in advance, etc, and put some pressure on the dealership. They replaced the plenum, flushed the old coolant and replaced with new for $350. I could have had it done at a local independent mechanic's shop for about $250, but went this route to document it, in case Buick/GM ever decided to accept its responsibility for shitty engineering.
The upgraded plenum apparently has a very good durability record.
The 1990-1992 3800 engine was a bit different. It had no plenum problems.
As a chemist, I would say that I don't believe that DexCool, in itself, is a problem. It is NOT the be all, end all, for sure. The newer HOAT technology is probably better. I do not believe at all that DexCool caused the gasket problems in some GM series, and certainly didn't cause the plenum problems.
Just sold my aunt's 99 LeSabre with 11,000 miles on it, In 7 years nothing but the fuel pressure regulator was replaced under recall.
A friend had a 99 as well and had numerous runnability problems. He had the FP Regulator replaced 3-4 times. Then he traded it for a Hyundia Sante Fe in 2004.
I decided to check rather than 'believe'. The 3800 Generation I was apparently available in some models in 1995. The 3800 Generation II was introduced in
1995, according to the references I have.
So, I don't really know if there was an overlap or not. Might depend upon your particular car. A VIN number check should tell the tale for sure.
I will research it a bit further and maybe I can find out which engine versions were actually in use at that time.
I'm not sure exactly when the Gen's changed. But I do know that in 98 a Code 1 engine is a supercharged 3800 GEN II. Unfortunately our online Service Info only goes back to 98 and the old paper service manuals are all up in the parts department. I may browse thru them if I get a chance.
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