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Motor advise for U20
Posted: Fri Jul 17, 2020 6:24 am
by Clearview12
Been driving my 69 2000 since 71, replaced new motor 95. Recently dropped valve seat and had machine shop replace and valve job. Assembled motor and leaking coolant probably from head. Is there anybody on east coast who can replace motor
Re: Motor advise for U20
Posted: Fri Jul 17, 2020 6:33 am
by spl310
Where is the coolant leak? Where are you located?
Re: Motor advise for U20
Posted: Fri Jul 17, 2020 7:17 am
by sfdaugherty
It is very common to have coolant leaks (especially from a U20) from the manifold gasket. I've had to go back and use a good sealant around the coolant passages to stop leaks. It may not be a bad engine.
Shannon
Re: Motor advise for U20
Posted: Fri Jul 17, 2020 8:12 am
by notoptoy
Where are you located on the east coast?
Re: Motor advise for U20
Posted: Fri Jul 17, 2020 6:21 pm
by DLR25
Tighten the front and back header nuts at the header 90. The stud/nut are very close to the bend in the header. The intake/exhaust gasket seals 2 coolant openings in the head. That is causing the leak. You'll likely need to remove the windshield washer tank to get your arm between the header and block to tighten these nuts. The nut is either a M12 or M14.
Re: Motor advise for U20
Posted: Sat Jul 18, 2020 10:09 am
by Gregs672000
What DLR25 said... (welcome BTW). It's likely that there's nothing majorly wrong. Was the engine over heated at some point and that's what led to the seat drop? Was the head surfaced or cut? It's probably the manifold gasket as suggested.