Re: {Chrysler 300} 413 Lame Lifter

["'Mwl1967' via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>]

Is the tapping something recent or right away when you got it back from the builder?  Lifter failures have been a sore spot for quite a while now with many Mopar guys steering clear from Comp Cams products and many others while a consensus seems to be to use Howards cam brands or clean and resurface old lifters. Do you know what brand the shop used? Did they Rockwell hardness test them before install?

You can probably isolate the noise with an inexpensive mechanic stethoscope from Harbor Freight. Having said that, does the noise remain constant? Go away when warmed up? Sure it's not an exhaust leak? 

Mike Laiserin

On Saturday, September 19, 2026 at 10:12:52 AM MST, Matt Allyn <allynentertainment@xxxxxxxxx> wrote:

I have a fresh 1962 413 build.

Machined by a very reputable builder

It was properly broken in on an engine stand.

I have maybe 25 miles on it; ha!

I have a noisy hydraulic lifter.

I replaced with new, of course, along with the new cam.

Thought the “tap-tap” would have gone away by now, but it persists.

Can you all help me diagnose the issue?

What is the best way to identify which, out of the 16, may be the culprit?

Compression test?

Any & all ideas are welcome.

Thanks!

Matt Allyn

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