Quote:
Originally Posted by Charlie T
If none of the above pan out you may want to do a compression test which could help you determine if you've got a weak/ broken valve spring or a bent push rod. It would be a PITA to have to take exhaust manifolds off to get to the valve covers otherwise I'd say just pull the covers and do a visual.
Good luck.
CT
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Thanks
I've read a lot of scary stuff on line about burned valves and dead cylinders but I'm just not ready to go down that road yet. These are basically Chevy 5.7's (350's) which are an awesome and reliable powerplant. I don't beat the boat up and don't run it wide open often so I'm not sure why I might have swallowed a valve or broken a spring. (Especially where I was simply cruising at 3k rpm's with only 5 of us in the boat) I sure hope this isn't my first experience with a problem like that. I do have a compression tester though and a Mighty Vac vacuum gauge/tester so I will try the mighty vac on a manifold vacuum port and see what it tells me. Should be 17-25 mm/hg at idle.
Thanks again and if you wake up in the middle of the night with the answer, feel free to share it with me
