Hamilton 188/220 Camshaft Help. PVC!

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kurtimas

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Jun 1, 2012
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Ok well I did not quite do my research well enough and thought that this was a drop in cam, it might be but i'm not sure need a little help here, well alot haha

Doing a overhaul on the motor.
So its quite easy for me to access measurements etc, can have the cam in and out if needed in minuets. just need to figure this out this piston to valve clearance.

Piston protrusion is .026-.027 on 1-6.
Valve depth from flat surface on head
Intake starting 1 to 6 -- .051"/.052"/.053"/.052"/.052"/.055"
Exhaust starting 1 to 6-- .044"/.047"/.044"/.042"/.045"/.050"

I'm not sure what the thickness of a compressed head gasket is but, i believe the spec calls for valve depth from the block deck, I measured from the head surface.

Unfortunately I was unable to check center line on the camshaft because we do not have a degree wheel in the shop.

Used to be a time crunch as I'm graduating from the diesel program in a couple days I will not be able to fix my pickup in time, so it looks like I will have a 2 week grace period to figure this **** out :bang


Not too sure if all that made sense! I've kinda got my head up my ass with alot of things at the moment.

Have a brand new fire ring headgasket STD size and a .020 gasket just in case of clearance issues and a easy fix.

Thank you so much for your help.
Zach I'm sure I'm going to love the cam, like you say if everything is done right it has to work. just gotta a little figuring to do.
 
The boat has sailed but man if you have to throw a twenty over gasket for that cam your kicking your own ass.

Throwing in a thicker gasket just for "clearance" is the wrong answer.
 
If I am correct, the #4 exhaust will give you .044 PTV on a stock gasket. That is a hair tight. Zach asked for .047 on 12vers. But cannot see it being a reason to move to .010 gasket. An expert should see this soon and line me out.

Edit:
Nevermind, the expert already posted.
 
Last edited:
It would be better to pull pistons and get them cut for valve clearance than to use the.020 head gasket.

Iirc there is a tool that will do this on the engine, looks like a valve with a cutter face. But I don't know if that its the best of ideas.
 
24vriviera said:
It would be better to pull pistons and get them cut for valve clearance than to use the.020 head gasket.

Iirc there is a tool that will do this on the engine, looks like a valve with a cutter face. But I don't know if that its the best of ideas.
Click to expand...

What is that tool called? Link?
 
The #s OP posted are the valve depth (recess)not the piston to valve continue on and check the PTV.
 
You can print off a degree wheel from your computer just google degree wheel.

Everything looks good except your piston protrusion. It is about .010 past maximum height. You will be fine with the .020 gasket pending you can verify a 99 intake centerline. If you want, p.m. Me your phone number and I can go over all the measurements and how to verify centerlines etc.

Zach
 
Hamilton Cams said:
You can print off a degree wheel from your computer just google degree wheel.

Everything looks good except your piston protrusion. It is about .010 past maximum height. You will be fine with the .020 gasket pending you can verify a 99 intake centerline. If you want, p.m. Me your phone number and I can go over all the measurements and how to verify centerlines etc.

Zach
Click to expand...

where else can you get customer service like that.........:Cheer:
 
SHughes said:
Must be a rehash of an older article. I remember seeing this LONG before the LS1 came out.

Renopker...How do you keep/get ALL the metal shavings out of the ring lands?
Click to expand...

We used a big Oring and a vacuum cleaner, and a junk cylinder head with good guides.
 
You are about .008-.010" too tall on you piston protrusion. Because of this you will not see all of the negative side effects if you use a thicker gasket that you would see if you had clearance issues because of shallow valve face depth.

If you had shallow valve face depth, you would have close to factory CR and the thicker gasket would lower it. With the clearance issue arising from the piston being too tall in the bore, this creates a higher than stock compression ratio. A .010" thicker gasket 3283337 I believe will put you back to stock CR and put your clearances correct.

If you get your pistons cut .030" and end up going with a stock 3283335 head gasket, you will have a higher than factory compression ratio, which would be ideal.
 
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