Hydraulic Roller Cam Button End Play

Darrah · 2025-11-10T11:56:46-0600

451Mopar said:
If the rear cam plug is out you can put a dial indicator on the back of the cam to measure end play.
might be able to do the same off a cam love with an indicator that measures at an angle?

The cam lobe is what I used when setting mine. Pretty easy to rig up a dial indicator and get a good reading. Not 100% parallel to the cam, but certainly close enough.

not so famous bob · 2025-11-10T12:17:37-0600

LSS&B said:
I have installed a hydraulic roller cam in a 440 that I am building.
I have 440 Source cam button 200-1170, nylon.
I have a stock timing cover that I primed with Rustoleum High Heat Gray, then baked.
440 source recommends endplay .005-010" (distance from cam to back of timing chain cover). Seems tight.
Is that the end play spec you generally use?
Length of button, front to back as pictured in .5 inches. Timing chain cover will not seat against block.
I am thinking of grinding down cam button in small increments, then using Play-Do on front of cam button with the timing chain cover test installed.
Anyone have the length front to back of a cam button that fits?
Is there a better way to measure this clearance?
Thanks
View attachment 1944547
View attachment 1944548

first off , you need to reinforce the timing cover some way , , I set mine at .010 max. , about 12ish yrs ago , no problems ...

LSS&B · 2025-11-10T18:14:13-0600

RemCharger said:
MRE - Billet Timing Cover MRE - Billet Timing Cover

451Mopar said:
If the rear cam plug is out you can put a dial indicator on the back of the cam to measure end play.
might be able to do the same off a cam love with an indicator that measures at an angle?
I think the cover gasket is around 0.010" thick? Maybe trim the cam button to where the cover just touches and add the gasket.
I use the rollerized cam timing set, so I don't worry if I'm on the tight side with the stock timing chain cover.
On the other hand, I just ordered the extra thick timing chain cover from 440 Source so I can compare it to the stock one.
They also sell the extra thick cover With a cam button reinforcement: Timing Cover - EXTRA THICK - With Cam Button Reinforcement
Seems like a neat idea if not a bit overkill.

From the first photo, it looks like the cam button is not sitting down into the hole in the timing chain gear?
Usually have to clearance the cam button for the timing gear bolts.

Mopar Hunter said:
For that price, you can’t go wrong.

not so famous bob said:
first off , you need to reinforce the timing cover some way , , I set mine at .010 max. , about 12ish yrs ago , no problems ...

AR224 $400.99 from Mancini is a reinforced timing chain cover and has a window/removable plate for setting end play
AR281 $60.99 from Mancini is Torrington bearing cam button that is matched to this timing chain cover
Although pricey, is this the best solution?
Can I run stock alternator and power steering brackets with it?
(The 440 Source Timing Chain Cover at $59.95 is a $400 savings, with no easy way to measure end play. Savings is less if I replace my cam button. I need to check thickness of my stock timing chain cover to see if it's less than .083", although with the plate the 440 Source triangle is .166". Tempting to do like @Darrah said and set up end play measurement at an angle )
AR224 pics

not so famous bob · 2025-11-11T10:30:25-0600

LSS&B said:
AR224 $400.99 from Mancini is a reinforced timing chain cover and has a window/removable plate for setting end play
AR281 $60.99 from Mancini is Torrington bearing cam button that is matched to this timing chain cover
Although pricey, is this the best solution?
Can I run stock alternator and power steering brackets with it?
(The 440 Source Timing Chain Cover at $59.95 is a $400 savings, with no easy way to measure end play. Savings is less if I replace my cam button. I need to check thickness of my stock timing chain cover to see if it's less than .083", although with the plate the 440 Source triangle is .166". Tempting to do like @Darrah said and set up end play measurement at an angle )
AR224 pics
View attachment 1946103
View attachment 1946104

not so fast my friend . I used the stock timing cover , welded a s.steel flat washer inside of it , where the button would rub on its side , not centered , then custom fit the button to it , ''about the cheapest way .''
Some Chevy guys shim between the cover and the water pump , with success...

Bird 426 · 2025-11-11T11:41:12-0600

There's no free lunch here, there are several ways to do this, but you still have to have some personal knowledge on how to get there. You may have to make this, or do that to accomplish the task. Pick one, and stay with the person that you have taken the suggestion from. Any one way that you choose will have it's own degree of difficulty. You can't just buy one and install it and done. Doesn't work that way.

Hydraulic Roller Cam Button End Play

Darrah

Well-Known Member

not so famous bob

Well-Known Member

LSS&B

Well-Known Member

not so famous bob

Well-Known Member

Bird 426

FBBO Gold Member

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