I'm considering the purchase of a low mileage 2003 Buick LeSabre and was
wondering if this model year was subject to the infamous intake manifold
gasket failure I've heard so much about. The vehicle has the 3.8L V6 engine.
Also, I understand that there were some issues with coolant leaking into the
EGR stovepipe as well. Have these problems been solved or is the 2003 at
risk as well? Appreciate any input you can provide. Thanks.
The issue with the EGR pipe melting the upper plenum was fixed
by this year. There are still issues with the upper plenum gasket
leaking, but frankly we hardly see any problems with them. Certainly
not to the extent that we saw problems with pre 2002 vehicles.
There is a campaign that could apply to your vehicle. Camp #03034
basically replaces three throttle body nuts with updated ones and
adds some coolant sealer to the cooling system. You can either
give me the VIN (last 8 of the vin) and I can check, or you can
have a dealership run your vin.
Does this coolant sealer have a name or part number? I have a '99
Blazer that has had a coolant leak smell for about 4 years. There are
no drips on my driveway or garage, so the problem may just be seepage
(evaporating before falling to ground).
The heater core and radiator appear fine, and there is no coolant in
the oil. Last year I added a fluorescent dye to the mix in an attempt
to find the leak, but was still not able to pinpoint the problem
(you'd be surprised what shows up under black light). I suppose the
thing to do is have the system pressure tested.....
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