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Jaxer Smith
Jaxer Smith, Auto Mechanic
Category: Car
Satisfied Customers: 1272
Experience:  17 yrs experience and currently own and operate an Auto Repair Center
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1998 Oldsmobile Regency: 3.8L..V6..heated..white smoke out the back

Customer Question

I have a 1998 Oldsmobile Regency with a 3.8L V6 SFI engine. It over heated for like 5 minutes one day then started blowing white smoke out the back and will not turn over anymore. It has been tested for a blown head gasket and that isnt what it is. A mechanic has it now and has replaced the Palenum gasket, injector O'rings, Lower intake manafold, and spark plugs, the plugs being the last thing tried. It started twice for him but when he turns it off it wont turn over again. We also tried a new battery. Someone told me somthing about a restart button. Sounds crazy to me but im no mechanic.
Submitted: 8 years ago.
Category: Car
Expert:  Jaxer Smith replied 8 years ago.

Hi, Welcome to Just Answer!


The first test that needs to be performed is a compression test. This is how you determine if the head gasket is blown. The initial description of what happened is classic to a blown head gasket. Take the guess work out of it and let the compression test prove it. All cylinder pressure should be within 20 psi of each other, if not... you have a blown head gasket or cracked head(cracked head is not very common).


If the starter just doesn't turn over then it can be tested by checking for power at the starter with the key in start position. If it has power and does nothing (no click, no nothing) then the starter needs to be replaced. If it gives a hard click. then the engine may be vapor locked from coolant entering the cylinders.... so back to the first thing first. Have a compression test performed(which should have been the first thing done).


If the mechanic says he can not perform this, then you need to take it to a different shop.