SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Sjulian on July 01, 2019, 11:48:35 AM
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I just had my 454 rebuilt and unfortunately finding out they did a terrible job.
We got the manifold bolts that were stripped in all fixed, water was leaking externally out the top of the manifold.
Next we changed the non adjustable rockers to adjustable and it runs perfect.
Issue is the oil keeps turning milky.
Ive ran gallons of oil thru it, pumping it out the remote oil filter, draining etc.
I had the oil pretty clean without running water in the engine as soon as I ran water thru it the oil goes white.
Im going to pull the valve covers to look for any water leak from a cracked head, cracked manifold.
Any other tips or tricks for tracking down the leak, without pulling the engine?
Thanks in advance
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Having early heads on a late block, or vice versa, will leak internally.
The wrong head gaskets will do the same.
Non adjustable rockers? A gen V or VI?
All the mark IV I've seen were adjustable.
Getting casting numbers and dates would be helpfull
Dan'l
Edit-
Are you running this on the hose? City water pressure can push out head gaskets and intake gaskets.
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Im honestly not sure I believe it is a Mark V, i will look for casting numbers tonight