Piston to valve contact. How bad is this?

[stockymcstock]

oh yeah it could be valve float, muz is right. what are the springs rated at?

very uncommon to get excessive valve float on an atmo engine though, much more common on a high-boosted engine with shitty springs.

[Steve]

And white is better than everything, especially maroon.

Buicks are the new black.

[BigMuz]

The shitbox roller followers these taxi engines use weigh about a pound each. I could never believe what the formula holden guys used to have to do to keep springs alive.

[TK]

Most of the valve springs you get for these fuckers will run into coil bind before the valve bumps a slug, but it is definately a possibility - especially if old mate has fitted some weird ass springs.
I've seen a head that was chopped clear through to the water jacket by the damper in the valve spring - thrashed hard & valve bounced in every gear, the damper slowly cut through the spring base untill it hit water, water mixed with oil, knob owner keeps thrashing & engine seizes.

[Billzilla]

I've seen a head that was chopped clear through to the water jacket by the damper in the valve spring - thrashed hard & valve bounced in every gear, the damper slowly cut through the spring base untill it hit water, water mixed with oil, knob owner keeps thrashing & engine seizes.

Good to see that they have the common sense to try to commit suicide.

[Steve]

I've come to the realisation that V6 Buicks suck arse. After a lengthy discussion, my engine builder, whom shall remain nameless, has agreed to make some changes for a moderate fee, which shall ensure what I can only compare to the running of the bulls. I can drive it, and when it goes bang, well, I got what I asked for. It may well hang together for 12 months if I treat it well. Next time around, if there is one, will be something else.
What sort of power can be had out of a 2J NA?

[BigMuz]

Float also makes the valve hit in a different position to the where the flycut is centred on. I'm not saying it is in this case but it can make you scratch your head and wonder what the buidler was thinking when he did the flycuts.

What changes are going to be made?

[stockymcstock]

sounds promising steve, i'd get it the fuck out of there before the gayness infects the rest of your car

[RB30-POWER]

out of curiosity would the ecotec engine have made a better base engine to begin with?

[Steve]

Float also makes the valve hit in a different position to the where the flycut is centred on. I'm not saying it is in this case but it can make you scratch your head and wonder what the buidler was thinking when he did the flycuts.

What changes are going to be made?

The fly cuts didn't appear to be on centre for where they'd been marked, and have been re done to the size of the valve and give clearance where the contact was, and look like a heaps nicer cut than the original. We"ve also gone from an ACL race series head gasket to a Cometic MLS 040'' gasket. What you said about the lifters weighing a pound each made sense and even with hardened pushrods and heavier springs and roller rockers would contribute to float compared to other engines i've had experience with. The coolant bypass has been re-fitted where it had been deleted, which i'm sure was the cause of the head gasket blowing in the first place.

[Andrew Bolt]

What sort of power can be had out of a 2J NA?

Plenty. I got ~150 rwkW from unopened motor with ITBs and exhaust. 200 would be a doddle.

[Steve]

So, finally, after everything else that went wrong with this build, old mate has 'repaired' my timing cover so I can hook up the coolant bypass again.

LIKE THIS!!!!

Needless to say I've now replaced it with a standard one.

[F|sh]

nasty

[GTSBoy]

what sort of assclown is this guy?

[stockymcstock]

a high-grade assclown by the looks