[DeTomaso] Valve Stem seal and Keeper replacement

[Tomas Gunnarsson]

Asa Jay,

I want to use the same springs that I had prior to the head overhaul but they are not the stock springs. The springs are the ones recommended for the cam in the engine. They have the same installed height as stock springs.

Tomas

----- Original Message ----- 
From: "Asa Jay Laughton" <asajay at asajay.com>
To: <detomaso at realbig.com>
Sent: Sunday, August 09, 2009 7:10 PM
Subject: Re: [DeTomaso] Valve Stem seal and Keeper replacement


> To me, this implies you want to use the same stock springs.  Why would 
> you want to do that?  Are you just replacing the valves and nothing 
> else?  Why not put in another cam while you're in there, and then use 
> the recommended springs, retainers, etc. from the cam manufacturer?  
> Personally I'd go the whole route, not just replace the keepers when 
> changing valves.
> 
> Asa Jay
> 
> Asa Jay Laughton, MSgt, USAFR, Retired
> 
> & Shelley Marie
> Spokane, WA
> 
> 1971 Mach I Mustang  [ASA JAY]
> 1973 Pantera L 5533  [ASASCAT]
>    
> ******************************     
> http://www.asajay.com
> http://www.teampanteraracing.com
>  
> 
> 
> 
> Tomas Gunnarsson wrote:
>> On the subject of keepers I have a question that I asked before but never got a reply for. What single groove keepers will allow me to keep the stock spring retainers when switching to new valves? I can find new keepers match the angle but not ones that match the old keeper OD. I've been unable to find aftermarket retainers that dimensionally replicate the stock ones for correct installed valve spring height.
>>
>> Tomas
>> ----- Original Message ----- 
>> From: <JDeRyke at aol.com>
>> To: <asajay at asajay.com>; <detomaso at realbig.com>
>> Sent: Sunday, August 09, 2009 4:19 AM
>> Subject: Re: [DeTomaso] Valve Stem seal and Keeper replacement
>>
>>
>>   
>>> In a message dated 8/8/09 5:39:29 PM, asajay at asajay.com writes:
>>>
>>>     
>>>> Dan has told me the stock valve stems and keepers can separate after long 
>>>> use, and possibly at high rpm. 
>>>>
>>>>       
>>> True- and its happened to Pantera owners, especially if the keepers are 
>>> multi-groove ones that do NOT clamp the valve stems tightly. But changing to 
>>> stronger forged single-groove keepers also requires changing the valves 
>>> themselves to match. If you do that, and the requisite valve job, it's easy to 
>>> change to all-teflon stem seals. Maybe next engine.... Good luck- J Dertyke
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