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-   -   Dumb Valve Adjustment Questions (http://forums.pelicanparts.com/porsche-911-technical-forum/304230-dumb-valve-adjustment-questions.html)

bmgmd 09-13-2006 12:59 PM

Dumb Valve Adjustment Questions
 
Glad to see Doug's (aka 2.7 Racer) as an official tech article:

http://www.pelicanparts.com/techarticles/911_backside_valveadjust/911_backside_valveadjust.htm

Will be doing my first valve adjust and had some (dumb) questions:

1) The article doesn't specifically say, but do I put the normal feeler gauges for the intake rocker throught the exhaust side and vise versa? It doesn't look like a normal long feeler will fit under the rocker if you are going through the side you are adjusting.

2) Is it advisable to combine methods using the backside for the intake valves and the "classic" way for the exhaust valves?

Thanks,

Brian

sig_a 09-13-2006 01:52 PM

Yes. You've got it. First, the intake valve adjustment at the elephant foot adjustment screw from above, then move below the car and check the clearance on the same cylinder at the intake valve rocker arm and the surface of the cam. Vice versa for the exhaust valves. And remember, .003" no-go and .0025" go. Unless you're working under a real car lift, you'll be up and down a number of times on each cylinder. But be patient, the 2.7 Racer way is worth the peace of mind.

Not that it matters much, but I used a regular Sears feeler gauge for the actual valve adjustment and the "go", "no-go" clearance check

Good luck.

nesslar 09-13-2006 01:57 PM

Sounds right and sounds fine, in that order. I figure any combination over and over even, for checking and re-checking. :)
One poster here once wrote "Cool! The top from the bottom, and the bottom from the top!" I really like the normal feelers on the cam, personally.
Now I've got to get back to diggin' that pit in my garage... :D

sig_a 09-13-2006 01:59 PM

On your second question. It's your car, but you'll compromise the accuracy benefit of the go, no go method without being consistent.


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