[DeTomaso] More valvetrain for 6143

Ken Green kenn_green at yahoo.com
Thu Jan 21 16:10:10 EST 2010


I thought they are 11/32, and there are plenty of 11/32 locks available.
 
http://www.summitracing.com/search/?keyword=11/32/%20locks&dds=1
 
Ken

--- On Thu, 1/21/10, Tomas Gunnarsson <guson at home.se> wrote:


From: Tomas Gunnarsson <guson at home.se>
Subject: Re: [DeTomaso] More valvetrain for 6143
To: detomaso at realbig.com
Date: Thursday, January 21, 2010, 12:39 PM


Are there single grove keepers that have the same diameter as the stock multigroove keepers? I couldn't find any myself. The suggestions so far have been using Boss retainers that supposedly have a smaller hole than the stock retainers and would fit the commonly available keepers.

Tomas

----- Original Message ----- 
From: <jderyke at aol.com>
To: <unlisted-recipients:>; <no To-header on input>
Cc: <detomaso at realbig.com>
Sent: Thursday, January 21, 2010 8:45 PM
Subject: Re: [DeTomaso] More valvetrain for 6143


> In a message dated 1/21/10 8:55:58 AM, ehpantera at yahoo.com writes:
> 
>> I don't know how you can check your valves. If I don't know what they 
>> are, I replace them.
>> Mark
>> 
> First, Ford valves are magnetic and most of the billet one-piece valves are 
> of non-magnetic stainless. Second, they will (as Bill Gaino said) have 
> three grooves for stock keepers, and one-piece valves are always made with 
> single grooves- which means that when you change valves, you also need a set of 
> single-groove keepers. The stock retainer washers will fit as-is.
> The big deal about this is, production valves are made with separate heads 
> and stems that are friction-welded together, which works OK up to maybe 5000 
> rpms. Or if the engine gets really hot like on a long, long climb up a hill 
> in the lower gears. Then the weld(s) break, the head comes off and destroys 
> the engine. Happens not only to Ford engines of all sizes but also VW and 
> many others. 
> And cheap 'stainless' valves from India or China may also be welded 
> together. Look for American-made valves that actually SAY they're one piece, not 
> just 'stainless steel'. Cheap grades of off-shore 'stainless' may be weakly 
> magnetic. Good valves will be around $14-16 each in name brands; cheaper= 
> suspect. Look at them as insurance, not power-producers. Good luck- J DeRyke
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