Re: {Chrysler 300} 413 Lame Lifter

if you used the later lifters from summit racing , you must use the later push rods from a 440 .

The early push rods have a different end that goes into the lifter .

the plunger in the early lifter is in a different location this could be your problem .

i beleive the early push rod is shorter.

Bob Hayen

On Sun, Sep 20, 2026 at 7:32 PM Robert Hayen <rbrthayen@xxxxxxxxx> wrote:

take your valve cover off . then start your engine . then take the end of a hammer handle and push down on the pushrod end of the rocker arm to see if the noise goes away .
how many hours on the motor ?
any silver glitter in the oil ?
does the engine hit on all 8 cylinders ?

Bob Hayen here in kalispell montana 406 334 9889 phone number

On Sun, Sep 20, 2026 at 12:22 PM 'Matt Allyn' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:
Well I did use a Comp Cam & Lifter set from Summit Racing.
(Yay, me)

I assembled the motor in October/Nov of 2023.
I just ran it again.
Seems to be predominately on the passenger front area; the clatter.
But it's not a quiet, hydraulic sounding motor.
Maybe it's more than 1 lifter.

It’s not an exhaust leak

Matt Allyn

On Sep 19, 2026, at 1:46 PM, Mwl1967 <mwl1967@xxxxxxx> wrote:

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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