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Sedans Buick LeSabre Buick LeSabre Engine help
62 messages, Last post on Nov 23, 2009 at 3:22 PM
You are in the Buick LeSabre Forum. Your Hosts are pat & karens
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Replying to: livingfree (Feb 01, 2009 6:54 am)
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Replying to: livingfree (Mar 01, 2009 6:23 am) |
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Replying to: livingfree (Mar 01, 2009 6:23 am) |
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| I am sorry this situation is being redirected to me, not to this post! the individual is responding to me, I posted a reply for a brake problem yesterday, not to this post.AGAIN I DID NOT REQUEST < I replied to assist..hope he or she is reading. Bob. | |
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Replying to: livingfree (Feb 01, 2009 6:54 am) Second the 3800 supercharged never came in the LeSabre so I suspect it would be a real problem to put one it. You'd be better buying a Park Avenue or Bonneville with the supercharged motor in it already. That's my opinion. You could look at the motor mounts on a supercharged Park Avenue or Bonneville and see if they appear to be the same as the 98 leSabre. I would assume a change in computer would be required for the PCM and some other controls may need to be added for the supercharger portion. The transmission is different for the supercharger version. I don't know exactly what those are but I recall one is related to the stovepipe connector engaging 4th gear. I believe they said in 03 all got the sturdier piece. I assume the transmission includes the final gearing pieces which may be different for the standard leSabre than the supercharger versions (higher ratio for more power rather than cruising and economy). I apologize that I didn't realize your question hadn't been answered. I recall reading it and thinking I don't have much if any direct knowledge. If you send an email to my carspace account from your carspace email account (carspace is in the upper left corner where it says "my carspace") and I'll link you to some pages where enthusiasts have done such things and you can ask questions and search for previous posts. |
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If your overflow flucuates and you are adding coolant and see none on the ground,your intake EGR tube has burned thru the plastic plenum and releasing coolant into your cylinders and will cause hydrostatic lock,ruin of main bearings,total destruction of engine if not fixed.Mechanics charge $800-1400 to fix.You can do it for less than $100.You will find directions on KenCo.com.I bought replacement plenum from RockAuto.com(best price anywhere).1 footnote when you get the black plenum off you will be looking at the top of the intake manifold, you will see a piece of 5/8 pipe sticking out about 2 inches tall.This has to come out,you will get a new one in the kit,take a large pair of locking pliers,lock on from the top and rock forward and back and it will come out.After that follow directions included in the kit.Took my time(slow)16 hrs.Saved Big Money.Wish you luck,and this is not hard. |
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The loss of coolant may be due to other causes than the intakes. The intake problem was helped in 1999 when the size of the EGR tube was reduced leaving more airspace between it and the ABS plastic around it. There are several things that can leak coolant. There are angled tubes connecting the LIM to the tensioner pulley bracket that carries coolant to the heater. The water pump can leak without showing a dribble until it gets bad. You can have leaks around the seals between the UIM and LIM which seal the tubes carrying coolant into the UIM and to the throttle body. There also are leaks at the gasket with the throttle body. The radiator hoses can seep. The radiator itself can seep. The tube connecting the reservoir to the radiator can seep. The reservoirs develop cracks and leak. The loss of coolant requires troubleshooting. One thing to watch is for large amounts of water on the oil cap. Small amounts occur normally. Another is to check the gallery under the oil filler while it's off. Change of color in the oil on the dipstick right after driving to a milky look indicates moisture in coolant. The treatment of the cooling system early in the car's life is a factor. Not changing DexCool very 2 - 3 years causes more problems, especially if the car were not driven often and heating the coolant above 140 def. F. One tip is clean off the underside of the radiator cap so the one way check valve works correctly. It often gets gooped up. The 2000 on motors have a much lower problem rate with intake leaks.
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Replying to: imidazol97 (Mar 05, 2009 7:05 am) has burned thru and looking at a good size bill,this was the way to go.That was an inherent design flaw from GM and they didn't start putting on the redisigned plenum and tube till 2005.Even now there is a class action suit against GM.Still from 2000-2005 they are still burning thru.Even on the plenum you can read when it was made from day,month,year.Look at the coin size circle on the plenum,the arrow points to 1-31days,95-?year-and 1-12Month it was made.
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| I have a 1991 Lesabre on the drivers side of the engine is a black plunger with a cable running to it also on the side is 2 hoses the one on top is smaller than the one on top. The cable is broken off along with the larger hose. The engine will turn over but not start. I need to replace the plunger part what is the name of this part. | |
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Replying to: 17thabn (Mar 05, 2009 4:15 pm) That is wrong. The LIM and EGR metal tube that came with it were reduced in 1999/2000 from GM. Other suppliers of intake manifold uppers shipped with their replacement uppers a metal tube that replaced the one in the lower intake manifold that had a reduced diameter allowing more air space around it for the incoming air to flow and keep things cooler. There are failures of EGR areas after that but they are fewer. It's sort of like Honda's problems with transmissions and toyota's with engine/transmission shifting problems, they never get completely cured. It is a design weakness. I think you may be confusing the Series III motor which had a metal UIM which has been used for a few years, perhaps it started in 2005. People still confuse the issues. There are NO suits re the upper intake manifold deterioration of which I'm aware. If you have a link, please supply it. There WAS a class suit re DexCool which ended in October IIRC. The DexCool allegedly deteriorated gasket materials allowing seeps. This is NOT the EGR area leaking through the crystallized ABS. The DexCool is an improved coolant and provides excellent protection in systems with multiple metals and the electromotive force they may generate leading to corrosion. However some people believed the 5-year and 100,000 mi meant they could add green antifreeze (old formula) and not change out the DexCool. Also the DexCool apparently underwent forumula changes early in it's life. That improved the protection of the gaskets. Earlier DexCool had an antioxidant that deteriorated when the coolant was abused which allowed bacteria or chemistry to deteriorate the nylon-66 gasket material. Hence the apparent success of the DexCool class action lawyers--who will make more on the deal than any GM owners will make. Plenums from other manufacturers do not use the circle method for dating their manifold. I'm not sure where, if any, date appears on replacement from the various companies.
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