[DeTomaso] Valve Stem Seals for ferrea f5040 valve / triple spring

[Tomas Gunnarsson]

Rolf,

The Cleveland heads are not machined to use that kind of seal from the factory. The outside of the guide is machined cylindrical to enable the seals to stay put. If your heads already had this type of seal installed before you simply measure your guide and buy what fits. Otherwise you have the head machined to fit the seal you choose.

Tomas

----- Original Message ----- 
From: "Rolf Poulsen" <rolf_poulsen at hotmail.com>
To: <detomaso at realbig.com>
Sent: Tuesday, June 02, 2009 6:55 PM
Subject: [DeTomaso] Valve Stem Seals for ferrea f5040 valve / triple spring


> 
> 
> I need to buy some valve stem seals. The valve stem diameter is 11/32 in. the outside 
> 
> diameter of the old seals is about 0.630 in. 
> 
> 
> 
> But what about the valve guide diameter? does this matter?  there are two different sizes at summit: 0.500 in. and 0.531 in.
> 
> http://store.summitracing.com/partdetail.asp?autofilter=1&part=HRS%2D93310&N=700+0&autoview=sku
> http://store.summitracing.com/partdetail.asp?autofilter=1&part=HRS%2D93315&N=700+0&autoview=sku
> 
> 
> 
> These are designed for triple spring but as long as the other ones fit inside the spring I guess there are no reasons for buying these?
> 
> http://store.summitracing.com/partdetail.asp?autofilter=1&part=HRS%2D93370&N=700+115&autoview=sku
> 
> 
> 
> Summit writes: "Machine Work Required - Yes". What do they mean by this? 
> 
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