......Top of the seal may have been damaged while removing spring?? Just coincidence that its cylinder 2? Top of spring fits perfectly over it. [/b]
yes it's possible if the spring compressor compresses the retainer too far it will do that...i did that myself then i readjusted my valvespring compressor and did fine on the rest
i was looking at the pics alot closer and from the looks of things those valves have been cut, as well the seats may have been...i have yet to pull apart one of my heads and see that wide of a valve seat contact area...i hate to say it but if the seats have been cut they may already be recessed can you get me a closer pic of the valve margin and the valve seats on the head?
With the shorter pushrods on milled heads should have been fine. I wonder if slack in the timing chain could've retarded the cam enough to make things hit. What kind of springs on there again?
I thought he had the XP in there, I'm not so familiar with the S2 cam.
Here's the #'s on found on both cams; actually looks like the s2 is a little bigger than the XP.
ZZP XP: 212/224 .325/.335 116 N/A
INTENSE Stage 2 Blower: 214/222 .332/.338 115 111 [/b]
i honestly dont think thats the problem...i dont have my eyeballs on em but i dont see evidence of the piston smacking the valve
off topic, hey ron you using an oe shortblock or building your own?[/b]
OE parts, but cleaned up and coated. I'm removing any casting flash, smoothing/grinding out oil drainbacks...yadda, yadda. [/b]
you coating the oe pistons? i have a thought on too much skirt clearance on these engines escecially on those with coated aftermarket pistons that because of the horrible thrust loading experienced by the SII have most of the skirt lubricant coating worn off...on eric's engine it doesnt have even 20k miles and the skirt coating is almost completly gone expecially at the bottom of the skirt. i miced it compared to an oe piston skirt at the pin boss and half an inch from the skirt bottom and taking into account the .020 overbore the worn aftermarket piston is nearly 12 thou loose than the OE, while forged pistons expand more i wonder if when at operating temp the piston is a good fit for the bore when that coating is worn away...
drill your mains out...and relieve the bores to unshroud the valves
i have been looking at plugging the two valley drainback holes to keep the extra oil off the rotating assembly and force the oil to return by way of enlarged Tchain cover drain holes in the face of the block, i think that instead of my oil squirter T chain lub'r the oil returning to the pan from the front cover should provide plenty of splash lubrication of the chain and tensioner. before you say it yes i realise that the valley can hold oil but after the initial fill it shouldnt be an issue...and while sitting the oil would drain through the lifter bores to the pan, this may however be a track oriented mod...just as long as you have a full dipstick not long after running the engine it'll be fine, as with the valley full any drainback from the heads and lifter bleed would easily return to the pan even during a wot 1320 assault... i gotta go...got a date dont wait up fella's
