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SadMike's avatar
SadMike
Explorer
Dec 10, 2013

454 /water in Cylinder 7 and coming out of exhaust pipe

I really need some help. I purchased a 1990 Fleetwood Bounder 34' with a GMC 454 in Oct 2013. I bought in Denver and from there I headed down to Arizona were I was for about 1 month. I drove for maybe...
dockmasterdave's avatar
dockmasterdave
Explorer
Dec 11, 2013
3 possibilities. That's it.
Cracked head or block, or bad head gasket. No other way water gets in a cylinde. I'd bet heavily on the head gasket. I agree, a pair of head gaskets, and valve cover gaskets, and an oil change. Good to go. Depending on mileage, you might want to clean/rebuild lifters if they are hydraulic, while you are in there. Might save problems later.

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