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Retainer to Seal Clearance? #230365
02/20/09 11:45 AM
02/20/09 11:45 AM
Joined: Jan 2004
Posts: 910
Southern Oregon
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toyotajeep Offline OP
super stock
toyotajeep  Offline OP
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Joined: Jan 2004
Posts: 910
Southern Oregon
Hello,

I am getting my basic 440 put together for some street/strip action.

The heads have new springs, and have been ported but are otherwise stock. Stock retainers, valves etc. Decent guides and valve seats.

I would like to run a .504-519 cam in it. Exhaust is decent for clearance between the retainer and seal.

Intake is about .474 right now for clearance. Not enough, hence the problem.

I should note that without the seal, I have over .700 clearance between the botton of the retainer and the top of the guide.

Are there alternate seals that I can get off the shelf and run as is? For a variety of reasons I would rather not go to the machine shop right now.

There must be some racer trick to fixing this.

Thank you for your help.

ROB


1989 Dodge Cummins & 1989 Dodge W-250
Re: Retainer to Seal Clearance? [Re: toyotajeep] #230366
02/20/09 11:49 AM
02/20/09 11:49 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
What seal are you using

Re: Retainer to Seal Clearance? [Re: MR_P_BODY] #230367
02/20/09 11:51 AM
02/20/09 11:51 AM
Joined: Jan 2004
Posts: 910
Southern Oregon
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toyotajeep Offline OP
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toyotajeep  Offline OP
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Joined: Jan 2004
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Southern Oregon
Stock ones in my 440 Fel Pro kit


1989 Dodge Cummins & 1989 Dodge W-250
Re: Retainer to Seal Clearance? [Re: toyotajeep] #230368
02/21/09 10:41 AM
02/21/09 10:41 AM
Joined: Jan 2004
Posts: 910
Southern Oregon
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toyotajeep Offline OP
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Joined: Jan 2004
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Southern Oregon
Anyone have any ideas?

I had heard at one point that GM BB seals would work, but I am not sure.

Grinding the top of the guide down won't do much either due to the seal design.

ROB


1989 Dodge Cummins & 1989 Dodge W-250
Re: Retainer to Seal Clearance? [Re: toyotajeep] #230369
02/21/09 12:09 PM
02/21/09 12:09 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
I Win
Cab_Burge  Offline
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Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Measure the diameter of the valve guide at the top of it and then order some aftermarket press on seals, those will help you get the clearances you need. It is very unusual for the exhaust to clear and the intake to not have the exact same clearances with identicle seals, maybe you need everything on those heads out real well to see if you can figure out what is causing this Let us know what you find and do to correct it I stock all kinds of valve seals for Mopars, PM if I can help you resolve this


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Retainer to Seal Clearance? [Re: Cab_Burge] #230370
02/21/09 12:32 PM
02/21/09 12:32 PM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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MoparforLife  Offline
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Posts: 25,200
Upper Midwest
Never seen a press on type Perfect circle type of seal that doesn't require machining the guide to install correctly. As for guide/seal to retainer clearance you need to have minimum of .060 at wide open valve lift preferably more. same as with valve spring travel to coil bind.

Re: Retainer to Seal Clearance? [Re: Cab_Burge] #230371
02/21/09 12:39 PM
02/21/09 12:39 PM
Joined: Jan 2004
Posts: 910
Southern Oregon
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toyotajeep Offline OP
super stock
toyotajeep  Offline OP
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Joined: Jan 2004
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Southern Oregon
Hey Cab,

I'm the obnoxious talks to much neighbor of yours to the south in Klamath County. The shop teacher from Woodburn's Mopar Meet last year.

Anyways, here is what I know:

The actual clearance is .720 on both Intake and exhaust without seals

The exhaust seal is more like a "washer" with rounded edges on the outside. It is quite a bit thinner

The intake is a typical rubber seal that goes down and fits fairly tightly around the top of the guide.

In my estimation, these are stock seals. They came out of the fel-pro box and fit fine.

And to answer the obvious question, why don't I take them to the machine shop. Well money is part of it, time is part of it, and I like to do things myself where I can.

Maybe I need some slightly taller retainers?

I will say that my current seat pressure matches my cam exactly and so forth.

Thanks, ROB


1989 Dodge Cummins & 1989 Dodge W-250






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