beaterX project thread

[Kevin 1G Drummer]

Shim/tappet valves are a bitch. When I put the motor for my bike back together I think I had each of the 4 cams in and back out probably 4 or 5 times to get the clearances right (mostly cuz my math skills are horseshit).

Were these new valves? My understanding is that if anything is going happen to the valve clearance, it'll get tighter, since the valve essentially stretches out a little. My suggestion is to just go down a shim size at a time till it meets tolerances. It's a bitch, but it's the easiest way to get the tolerances right. I assume you have an assortment of shims?

[Super Bleeder!!]

Shim/tappet valves are a bitch. When I put the motor for my bike back together I think I had each of the 4 cams in and back out probably 4 or 5 times to get the clearances right (mostly cuz my math skills are horseshit).

Were these new valves? My understanding is that if anything is going happen to the valve clearance, it'll get tighter, since the valve essentially stretches out a little. Exactly how much tighter than the minimum tolerance are they?

I dont think its the valve stretching so much as the valve seat being compressed?

[Kevin 1G Drummer]

I dont think its the valve stretching so much as the valve seat being compressed?

Could go either way I guess.

[scheides]

Think this alone could be causing oil consumption though? I don't want to go through the massive PITA of swapping out tappets to only fix part of the problem.

Plus, I am not confident in what tappets I ended up leaving in the car so the tappet swap could turn into a huge nightmare. There's *47* different tappet sizes.

http://i.imgur.com/TWQDAl.png

[turbotalon1g]

Not cool. I'm clueless on this subject so all I can do is wish you luck and hope for the best.

[goodhart]

Yikes.

[Kevin 1G Drummer]

I kinda doubt that tight valve clearances would result in oil consumption, the only thing that could really do is make it so the valve doesn't seat with 100% pressure. Hhow much oil is it burning? Enough to smoke all the time? Only on startup?

[JET]

Joe nailed the reason, compressed valve seats probably. That shouldn't cause any issues with oil consumption though. It could allow some combustion pressure to leak back in to the intake or exhaust, but since your power isn't down it does not sound like that is happening.

For the oil it could be valve seals or rings. After your incident I would think rings/cylinder wall would be the most likely but it could be many different things.

[scheides]

The car is down slightly on power so I'm on board with the compressed valve seat theory;

Love second third fourth opinions though keep them coming please!

[Super Bleeder!!]

Time for a leakdown test?