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Lifter Size and Bore

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Old 11-01-2011, 06:10 PM
rpatrick rpatrick is offline
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Lifter Size and Bore

I'm replacing the hyd roller lifters in my 302 and have noticed that I can get them in .874 diameter and .875 diameter. What is the stock size and what is the other size for?

You'd think this was a simple question but the searches I've done are confusing. Some places say the lifter is .875 diameter which implies that the actual bore (hole) in the block is larger.

I have also found posts that say the bore is .875 which would mean I would need the .874 lifter to get it to fit.

Thanks for your sage advice,
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Old 11-01-2011, 10:17 PM
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That is just a 1/1000th of an inch difference, I can't imagine that will make a difference. The manufacturers must just list them funny. Just make sure the part is for the proper application.

By the way, I've never experienced a problem with my hydraulic lifters, are you just being thorough?

It's hard to beat the factory Ford lifter unless your looking for a lifter for a little more RPM. You can get a little more RPM out of the factory one by just putting less lifter pre load in it.
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Old 11-02-2011, 09:12 AM
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My chiltons manual lists the standard lifter diameter as 0.874".
0.875" diameter lifters are likely only used if the bores have to be rebored due to excessive wear.
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