1990 Cadillac Coupe DeVille

[mrswrigh41191]

I have a 1990 Cadillac Coupe DeVille I recently replaced my radiator and did a oil change and my alternator. when I get spark plugs I think it might havemessed up the firing order could this be the problemthe issue I'm having is antifreeze bubbling through my reservoir didn't start until I did all these changes

 

[wss_003]

no that is not the problem if the firing order was wrong it would miss like crazy and depending on how bad it was messed up likely not start at all...is the car overheating?

 

[mrswrigh41191]

no that is not the problem if the firing order was wrong it would miss like crazy and depending on how bad it was messed up likely not start at all...is the car overheating?

 

[mrswrigh41191]

Well that's what I was think, but the car starts and it will drive . Some times when I start it will make a humming noise then I will try it again and it will start up. My hit drives very good. But just has this problem since that. So if I get my spark plugs changed will it fix the problem.

 

[mrswrigh41191]

Yes it over heats after like 3 hrs. It bubbled some aintafrez out of the reservoir

 

[wss_003]

plugs will not fix the issue it sounds like the cooling system is air locked, but it could also be a head gasket issue

 

[mymutter]

some northstar and GM engines have bleeder screws on the top of the engine. not sure if yours is one of them, but it's something to check.