05-14-2024, 01:50 PM | #1 |
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Mercury 312
Don’t have access to the car right now…so, question - is there a valley cover beneath the intake ? Or do I just need intake gaskets when removing the intake to access the valve train…?
Thanks Last edited by cavecreekjake; 05-14-2024 at 02:00 PM. Reason: Addl ? |
05-14-2024, 03:20 PM | #2 | |
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Re: Mercury 312
Quote:
If for some reason you need to remove a lifter, you will need to remove the camshaft and pull the oil pan. This is because the lifters come out the bottom only. They are called mushroom lifters because the base is much larger diameter than the body. They are solid (mechanical), by the way. |
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05-14-2024, 06:31 PM | #3 |
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Re: Mercury 312
Thanks…. Not happy to learn that, but hastbe done I guess..one ticking lifter, and hoped for a simple solution
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05-14-2024, 06:56 PM | #4 |
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Re: Mercury 312
1 ticking lifter on a y block ,it is probably out of adjustment. set the valve lash. ck a service manual for spec. Y blocks do not have hyd. lifters, they are solid lifters only. remove the valve covers and adjust the valves , it may save you a lot of work for nothing
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05-14-2024, 07:11 PM | #5 |
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Re: Mercury 312
Stock spec for rocker arm gap,is .019. See if you can locate the noisy rocker and make sure the push rod goes up and down
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05-14-2024, 09:55 PM | #6 |
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Re: Mercury 312
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05-15-2024, 07:11 AM | #7 |
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Re: Mercury 312
While you're in there you might check the loose / noisy one for a bent pushrod.
They can bend if a valve is sticking. |
05-15-2024, 07:13 AM | #8 |
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Re: Mercury 312
Thanks guys…. Hoping it’s simply adjustment
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05-21-2024, 12:00 PM | #9 |
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Re: Mercury 312
.019 is hot lash. However, Tim McMaster (y-blockguy.com) likes to tighten lash to .015 "to quiet things down) on Y-blocks with stock cams. Cold lash should be .001-.002 more than hot lash; however, there is very little expansion on engines with both cast iron block and heads.
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05-22-2024, 10:56 PM | #10 |
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Re: Mercury 312
I watched the y-blockguy video and he set his lash at .019 I think. the truck sounded like hell. isn't .015 a tad tight?
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05-23-2024, 12:04 AM | #11 |
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Re: Mercury 312
Tighter than what's specified in Ford manuals, but surely Tim knows what he's doing. He also said that he uses .020 lash for one of the aftermarket cams he uses, but he didn't say which.
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05-23-2024, 11:39 AM | #12 | |
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Re: Mercury 312
Quote:
Sal |
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