yotaracer

Finally picked up a set of new casting Cnc ported ls6 heads for my ls1 build. I'm wondering if my valve guide clearance is too much. I'm running steel guides with Manley stainless valves. Right now I'm at .0021 clearance. Checked with deltronic .0001 pins and my mitutoyo mic so I know it's accurate. I've read a lot about bronze guides and most recommended about .0015, couldn't find a lot on steel guides. Will I have trouble if I assemble heads like they are ?

Georgies

Any update on this??

Ls6 heads original guides and valves. Biggest clearance so far is 0.0018.

I would like to know whats the spec in the service manual.

G Atsma

Updates? After 3years? If it's not here now, it won't be.

Georgies

Thanks for your input

dixiebandit69

Those clearances sound fine for a street engine, though the numbers you are looking for are .0017-.0021.