push rod and cam question

[amcinstaller]

any chance you could grab a casting number and a picture of the crack on that head?

[vashxj]

it was a 0630 head ill post pics tonight now i got a 7120 head i like the temp sensor hole i can use that for my elec. fans sensor

[92tank]

i have seen a 0630 head crack in the same place

[vashxj]

between cyl 1 and 2 its hard to see


and cyl 3 into the surface

[Cheromaniac]

Cracks in the head around the valve seats are usually a sign that the head's been overheated.

[IH 392]

I would prefer the nipple. My stock 2000 Cover had one.

Yep, the cover on my '00 core is the EXACT same cover that's on my '97.

Cracks in the head around the valve seats are usually a sign that the head's been overheated.

I agree, that engine has been COOKED!!!

[vashxj]

ya bad things happened in there, that was off a 98 my new one looks good its off a 93 the #2 piston was blown up but the head looks good so far

[vashxj]

another question whats the best oil/way to break in the new cam

[Cheromaniac]

another question whats the best oil/way to break in the new cam

Valvoline VR1 with some GM EOS additive for the cam break-in.

[SilverXJ]

another question whats the best oil/way to break in the new cam

There are a fer break in oil available. I would recommend Joe Gibbs or Brad Penn. Just use their oil straight, no additives.

[vashxj]

thanks alot you guys i got to put it on as soon as i get the head back this week, cuz im going to byron dragway the 15. and my springs are still on back order. im going to use the new stock ones i have for the break in. i might have to race on those if the performace ones dont get here in time

[Retlaw01XJ]

im going to use the new stock ones i have for the break in. i might have to race on those if the performace ones dont get here in time

Be careful, you'll be running the stock springs in the danger zone!
My stock 2001 springs would coil bind (stack solid) at 1.120". At a 1.64" installed height, there's 0.520" left for valve lift.....subtract the 0.060" safety margin, and those springs are only good for 0.460" lift. The Comp cam you mentioned has 0.485" lift.... more lift than is safe for those springs.

[vashxj]

good point thanks for saying something i didnt really pay attention

[Retlaw01XJ]

good point thanks for saying something i didnt really pay attention

Just trying to keep you out of trouble!

[vashxj]

hey so how beneficial is exhaust wrap anyway, i was thinking of doing that before i put the header on but it is ceramic coated to. guess it wont hurt to put on wrap