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What is cause behind a 258 sounding a little like a diesel?

Posted: June 8th, 2017, 7:11 pm
by CJ-8_Jim
My 258 overheated due to a cooling problem. Now it sounds like a diesel at idle with the hood up, but you can't really hear it with the hood closed.

What is the likely problem?

Re: What is cause behind a 258 sounding a little like a diesel?

Posted: June 8th, 2017, 7:53 pm
by IH 392
They are subject to excessive rocker arm bridge wear and lifter noise, that's probably what you're hearing?

Re: What is cause behind a 258 sounding a little like a diesel?

Posted: June 9th, 2017, 4:58 am
by SkylinesSuck
Something warped from the heat possibly causing a broken piston/skirt? Anything like that making noise is going to require the motor coming apart.