Buick LeSabre Problem Report

Buick LeSabre Engine Won't Turn Over Due to Coolant Leak From Upper Intake Manifold

(30 reports)

The upper intake manifold may develop an internal coolant leak causing one or more cylinders to fill with coolant. This can cause the engine to "hydro-lock" and not turn over. Removing the spark plugs will allow the engine to turn over pushing the coolant out of the spark plug holes. Replacing the upper intake plenum and gasket is commonly required to correct this condition.

The engine can be very difficult to start after this problem has been repaired, it can be helpful to clear as much of the coolant from the intake manifold and cylinders as possible before reassembling the intake manifold.

coolant leak at upper intake. common problem with the 3800 engine. had repaired along with new hoses. total cost $785. Ouch) i dont know how gm avoided not recalling this problem. there are ten's of thousands of people that had this happen to them too. -
my car is using coolant its going through intake and out into the cylinders and being pushed out exhaust my buick under a load going uphill starts missing because of the coolant leaking into the intake manifold gas chambers causing multiple miss fires -
I have a 1997 model and just had the plenum which is the intake replaced. It wouldn't start and i told the mechanic there was antifreeze in the black tube going to the air filter and he said it was the intake. Its made of plastic and there is a metal pipe that exhaust heat goes through and melts a hole in the intake that allows coolant to enter the top of the engine. The part is around $130.00 or so but the total repair totalled $530.00. There was no knocking from the hydro-lock so we decided to fix it. Hope this was helpful.. -
tech was doing a major tune up felt water and said the intake was leaking and needed to be replaced before coolant got in to cylinders he fixed it and no more coolant loss. -
While my coolant system starting with the waterpump and then the radiator and then I was driving it and it ran hot and shut off and then. I got it towed. To my shop and next it like the coolant was flowing and then the coolant mixed with oil -
starter tried to turn over but it was not ,changed starter same thing , cable , nothing put breaker bar on harmonic and turned till it got real tight pulled one plug and pulled harder and it turned over , turned key and it cranked ok,sounds like it is out of time now no start, sugest not changing the starter try every thing else first -
My gasket was deteriorated, replaced it & plenum - problem solved! Indications were adding a quart of oil between changes, adding coolant at every 1500 miles, missing/rough engine on cold start, missing noted under load, intermittant service engine light, milky gunk on dip stick. Cost was $465.00 at trusted private garage/mechanic. -
it wont start due too the problem of 1 or more of the cylinders filling with water. after putting a new radiator in. this problem came up. so guess to the scrap yard. t -
Intermittent service engine light, need to top off coolant and oil between regular oil changes, check gas cap notice, rough start when cold , missing under load (slight incline with 4 persons in car. These symptoms are all intermittent but regularly occurring & makes the thought of taking a long trip worrisome & risky, being caught at mercy of mechanic that one does not know with downtime. -
leaking coolant, changed intake gasket -
would not start -
I have a 98 buick park avenue that had a hydrolock, the engine light came on and off and the motor lost power, i pulled over, opened the hood and the radiator hoses were all collapsed, had to replace the seals on the head, it was over a $1000 to repair, I still am loosing coolant from the over flow -
Heater blew cold, engine overheated. Next morn low on coolant. Filled and started. It blew it out exaust then shut down and wont start. -
same problem -
filled collant tank up. ran engine to warmup. waited a few minites, restarted, blew noise cone off of starter. replace starter, dry out sparkplugs, replace uppermanifold. -
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