alum p-51 heads

useing arp lube what torque need to be?

Recommended to me by Charlie for my P-51's 6 inner studs on each head 140 ft. lbs. Outer 4 studs 135 ft. lbs. Make sure you warm up the motor completely then let it cool overnight. Then retorque all studs. I failed to do this and ended up with some blown headgaskets. Charlie had to surface my heads slightly also.

That was with oil on the threads. That will be a little too much with the ARP lube, and we need to back off a bit. Check the ARP website and see what they recommend. The re-torque after a heat cycle is very imo.

Charlie

Not running P-51'S but I retorqued my heads and thought I was wasting my time until I found one loose stud..Glad I went through them now....

Glad you piped in Charlie. I don't think I wrote down oil in my notes. Anyone ever use the CRC moly graphite assembly lube on threads? I used this stuff on my bearings and wondered if it is similar to the ARP lube.

not sure but we use the crc at work look alot like the arp moly that cam with my rods for the bolts to me

Just found this on ARP's website. They compare their stuff to Moly and oil.

http://www.arp-bolts.com/pages/viewcatalog.shtml

thanks guys

135-140 with 30 or 40 straight wt. oil

Well everything went smooth torque them babys 135 with 30wt thanks for the help guys.

What's your head gasket?

cometic

I did the 140/135 on mine, oil on the threads... moly on the washer face, cometics as well..... so far so good.

richter69 wrote:I did the 140/135 on mine, oil on the threads... moly on the washer face, cometics as well..... so far so good.

If a guy was gonna get down to the hair spliting deal....a voodoo mix of that gray stuff & oil for the underhead of a bolt or washer face for stud nuts...no moly on the threads for the head and main fastners....2nd choise.

#1] Oil on the threads + that CMD extreme pressure lube # 3.... that yellow & green tube that Manley sells as part # 40177 on the underhead. You guys that have assemblied many engines will know what I mean....when you pull on the tq. wrench it's smooooth...no hitch, no jerk, just smooth.

damn junk ass 6.0/6.4 headbolts....... JT6 grease on the face and 75-140 gear lube on the threads is the only thing to make um smooth......

richter69 wrote:damn junk ass 6.0/6.4 headbolts....... JT6 grease on the face and 75-140 gear lube on the threads is the only thing to make um smooth......

JT6 ? Is anything like TA31?

So, you know of which i speak. If a guy was useing 10-w30 oil on a performace tq. job...he'd not only feel but hear what a poor job was being done....more so if the fastners were new.

Don't know if it was a rookie mistake but i tried to put the head on with a few studs to guide the head and the dowel gave me a time so after pulling the head a few time i took them out and then put the head on the dowels and then screw the studs in. Looks as i would have known the dowels was not just for looks lol.

Speaking of TA31....I need to get some more

John Myrick wrote:Speaking of TA31....I need to get some more

I sold the last 6 tubes today....how many of the 6 that'll be here tues. do you want?

Lem Evans wrote:

richter69 wrote:I did the 140/135 on mine, oil on the threads... moly on the washer face, cometics as well..... so far so good.

If a guy was gonna get down to the hair spliting deal....a voodoo mix of that gray stuff & oil for the underhead of a bolt or washer face for stud nuts...no moly on the threads for the head and main fastners....2nd choise.

#1] Oil on the threads + that CMD extreme pressure lube # 3.... that yellow & green tube that Manley sells as part # 40177 on the underhead. You guys that have assemblied many engines will know what I mean....when you pull on the tq. wrench it's smooooth...no hitch, no jerk, just smooth.

The CRC stuff I was referring to was also called pressure lube. It was a moly graphite mix. I used a little with the 30 wt oil on my rod bolts and main studs. It was nice and smooth just like you say. Seemed very similar to the ARP stuff. I just didn't get around to buying any of that. I haven't put the heads on yet but I might mix in a little. It seems so much smoother than just oil.

Lem Evans wrote:

John Myrick wrote:Speaking of TA31....I need to get some more

I sold the last 6 tubes today....how many of the 6 that'll be here tues. do you want?

2 please