Valve Stem Guides
Thread Starter
Instructor
Joined: Oct 2001
Posts: 117
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Valve Stem Guides
Anyone know the diameter of valve stem guides on a stock 69' 350 L-46 engine? I assume the guides are 11/32" but don't know the diameter.
Also, I have looked through the archives and noticed several different recommendations for valve stem guide seals. I can't afford the machining necessary to do "Positive" type seals. Does this mean I am stuck with Umbrella type or can I use something like this? http://www.hughesengines.com/www/hug...stem_seals.asp
OR THIS? http://www.enginetech.com/pr_valvestemseal.shtml
Opinions?
Thanks
[Modified by rickc, 9:00 AM 5/24/2003]
Also, I have looked through the archives and noticed several different recommendations for valve stem guide seals. I can't afford the machining necessary to do "Positive" type seals. Does this mean I am stuck with Umbrella type or can I use something like this? http://www.hughesengines.com/www/hug...stem_seals.asp
OR THIS? http://www.enginetech.com/pr_valvestemseal.shtml
Opinions?
Thanks
[Modified by rickc, 9:00 AM 5/24/2003]
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Re: Valve Stem Guides (rickc)
umbrella seals will work well on a street engine,just make sure the you have enought clearance betweev the top of the valve guide and the bottom of the the valve spring retainer. on race engines i use positive seal on the inatakes but use a umbrella seal on the exhaust because in the turns the g force will prevent the oil from getting to the lalve stem and may cause the valve to stick in the guide from lack of lubrication. :chevy
Racer
Joined: Jun 2001
Posts: 440
Likes: 0
From: Sanford Florida
Re: Valve Stem Guides (rickc)
I have the houghes on my bowtie heads. Different bosses will be different (my bowties were .561") Most, if not all stock heads will be more than that. I had to spring for the machining because my valves had no place for the o-rings, and my dual springs had just to small of an ID on the inner springs for ANY other seals to fit. I went through box after box at NAPA, and into the machine shop was the final answer.
Positive seals are nice, umbrellas work great, o-rings came on millions of cars. By the way, the machining of guide boss is only about 50-75 cents each. (8-10 bucks for the set) if you have them off and disassembled. :cheers:
Positive seals are nice, umbrellas work great, o-rings came on millions of cars. By the way, the machining of guide boss is only about 50-75 cents each. (8-10 bucks for the set) if you have them off and disassembled. :cheers:
