How is it posible to bend valves upon first fire up?
#1
How is it posible to bend valves upon first fire up?
Hey guys. Just figured out why my car would run on only 1/4 and barely on 2/3. It has bent valves. I have GSC zero tick lifters. I bled them before I put them in.
Setup is a 2.4 with mivec head, GSC r2 cams, kiggly behives and ferrea valves.
Engine was timed correctly etc. I've timed it many times previously. I am puzzled as to how this could happen? Bad lifters? When I took the lifters out. Some where squishy and some where soft.
Thanks
Setup is a 2.4 with mivec head, GSC r2 cams, kiggly behives and ferrea valves.
Engine was timed correctly etc. I've timed it many times previously. I am puzzled as to how this could happen? Bad lifters? When I took the lifters out. Some where squishy and some where soft.
Thanks
#2
Evolving Member
Maybe the valves hit the pistons. I think R2's have the most lift of any cam. Do your pistons have the recessed reliefs for the valves (valve pockets?). Just a thought, good luck solving you problem.
#6
Evolved Member
iTrader: (125)
lifters take time to bleed down after removed from head and reinstalled. they can hold valve open wider than normal for first few hours after install. has had me worries a few times on start up. but never used such a high lift cam. if head and block are both machined you can be in clearance trouble with those
#7
lifters take time to bleed down after removed from head and reinstalled. they can hold valve open wider than normal for first few hours after install. has had me worries a few times on start up. but never used such a high lift cam. if head and block are both machined you can be in clearance trouble with those
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#12
Yes. Both cheked while the engine was timed when it was on an engine stand and then cheked while it was having starting issues and then yesterday.
Hooked up my compressor to it with about 120 psi. Keep in mind. All lifters are out. When I pulled the lifters. Some where squishy and some where rock solid. Lifters are GSC zero ticks.
Took the intake manifold off.
#1- leaking out the intake port from valve closest to cam gear.
#2- leaking out the intake port from valve closest to cam gear.
#3- leaking out the intake port from valve closest to cam gear.
#4- leaking out of exhaust side.