Bent Exhaust Valve
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2nd Gear
Joined: Oct 2007
Posts: 6
Likes: 0
Bent Exhaust Valve
I put a new EV-27, right bearing, crane time savers, and ultra lifters in my 93 evo. Took me awhile to get the lifters, so in my haste to get it running did'nt let the rear lifters bleed down. Started up, but ran horrible. Put my hand over exhaust pipe and was getting a vacuum pulse! Put a compression gauge on it, zero. Went through the pushrod adjustment procedure and after 2 1/2 or 3 turns the seemed like the spring pressure went soft. Could it be a lifter (trying to be an optomist)? How do I confirm bent valve before I tear the top off?
Road Warrior
Joined: Dec 2007
Posts: 1,854
Likes: 20
From: Eagle River WI
When you put new lifters in they should be dry What I do is leave the pushrods out pull the spark plugs then turn the engine over to allow oil to fill the new lifters Now put the adj pushrods back in and adjust per instructions You might have adjusted the pushrod (with a dry lifter assembly ) cam at bottom tighten pushrod till valve starts to open then turned 21/2 more opening the valve even further thinking you were adj a pumped up lifter
Road Warrior
Joined: Apr 2007
Posts: 1,354
Likes: 1
From: S.W. Florida
When you put new lifters in they should be dry What I do is leave the pushrods out pull the spark plugs then turn the engine over to allow oil to fill the new lifters Now put the adj pushrods back in and adjust per instructions You might have adjusted the pushrod (with a dry lifter assembly ) cam at bottom tighten pushrod till valve starts to open then turned 21/2 more opening the valve even further thinking you were adj a pumped up lifter
Last edited by Buddy WMC; May 13, 2010 at 08:43 AM.
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