F-2 Speedy

mine to

getrdunn

Must have had some valves not closing all the way also. Could explain the overly rich looking chambers, down on power, chamber cc's? etc. Would be nice to know what installed height was suppose to be in comparison to what is shown.

sutphen 30

you are,,but remember this too.the springs seats in the head could also be all over the place.plus the seat on the valve could be in a different height also,,stacking the tolerances.

key is to put the head in seat cutter machine and index all the seats.see where they are.when I cut them,there dead nutz on.

getrdunn

So go by the furthest one in and cut all to same depth with new seats? Time to bake your heads in the wife's oven rather than a roast. Get lucky at 475 they might just fall out.

MILD THUNDER

Reminds me of the shop that replaced the seats and rebuilt my old heads. Install heights all over the place. However, those were 15 year old castings, that been thru a few hands. If the install heights varied that much on a new set of heads that never been cut, I would think that is , well, not so great. At the very least, even if the seat height varies that much, or like sutphen said, the casting itself having different heights of the spring perch, you would think that someone would go thru them, record all install heights with the retainer and locator installed, and shim accordingly, so at least, all the springs have equal pressures. .040 variance, is alot!

Any good shop worth its weight, would blueprint a set of heads so to speak, and check each valve. Not check one valve, throw 16 springs in there, and call it good.

F-2 Speedy

I thought this was all checked when the lifter stuck ?? before it went back together.......spring issues ect.

SB

115

sutphen 30

better check all the heights,,plus check all the springs.

sutphen 30

easier to run a tig torch around them and shrink them.then they fall out.

MILD THUNDER

For sure. On mine, we checked all 32 springs. Sure enough, we found 1 spring out of spec.