dogsballs

Correct, 5364 rectangle heads
236/246 615/615 110

jerr6

iTrader: (1)

i measured assembled valve drop. 821 heads milled .007,.051 headgasket i got .
i got .210 assembled. i only have a digital caliper to use.

speedtigger

iTrader: (16)

Wow. That is quite a lot of room. Apparently the dished pistons make a nice amount of difference.

jerr6

iTrader: (1)

I founds online the dish measured .053 deep and I measured .051

TXsilverado

iTrader: (18)

since we're posting pics. I had to hit my pistons with a grinder .090 to get .070 PTV clearance.

speedtigger

iTrader: (16)

My quick math says those dishes bought you about .033" extra clearance over a flat top. That is a nice bonus for the guys running the LY6. So, you get something for the compression you give up.

jerr6

iTrader: (1)

Can u guys answer something for me. If some of my lifters are still pump up all the way does the valve spring pressure bleed them down?

speedtigger

iTrader: (16)

Yes. They self meter. This allows them to adjust to a variety of preloads. That is why they do not need adjustment.

jerr6

iTrader: (1)

So if I was using a lifter that was fully pumped with checker springs to find PTV clearence my first test that's like adding length to the pushrod since the lifter didn't take any preload. That would make the valve open way more ?

speedtigger

iTrader: (16)

You could probably successfully check the valve clearance with checker springs if you used an adjustable pushrod set at 0 lash. That is about the only way but, using a hydraulic lifter still adds a variable and some uncertainty.

TXsilverado

iTrader: (18)

checker springs with a full length pushrod would add whatever preload you have build into the pushrod measurement (assuming the lifter does not plunge). I measure using checker springs, a solid lifter, an adjustable pushrod set at zero lash and a dial caliper sitting on top of the retainer. this pic was playing around watching the base circle. it's really not necessary to use the gauge for base circle. stick your thumb into the pushrod and rotate motor and stop when the pushrod reaches the lowest point. use a junk gasket, snug down the head bolts, snug down a rocker at zero lash and mount the caliper onto the retainer like I have it on the pushrod. make sure to try and match the angle of the valve. rotat motor 2* at a time and push the rocker down and watch the caliper. it will eventually give you exact PTV measurements without playdough sticking to your valve, or falling off of the piston.

jerr6

iTrader: (1)

Hey guys thanks for all your help! I really appreciate it.