LB7: Turbo go boom need opinoins on rebuild

[DIESELMAFIAPER.LB7]

well damn piston rings didnt show up so but i guess i'll put the crank and cam and get the lifters back in and secured down got the studs yesterday though wish i had piston rings that thing would be waiting for the heads by mid day ha ha

 

[ripmf666]

Just got the pricing on the rings fron mahle oem 330.00+ shipping

 

[DIESELMAFIAPER.LB7]

well shit maybe i'll cancel the perfect circle ones how long for you could have them to me?

 

[JoshH]

well shit maybe i'll cancel the perfect circle ones how long for you could have them to me?

They should be the same rings. http://mahleclevite.com/p_lv_pistonrings.asp

MAHLE Original piston rings lead the way in ring technology and innovation for the Aftermarket – after all, MAHLE is the largest manufacturer of piston rings in the world. MAHLE Original rings (formerly Perfect Circle) are at the forefront of light vehicle piston ring technology.

 

[DIESELMAFIAPER.LB7]

hm well i'll have to see when ripmf666 can get rings to me by 330 is alomst 120 bucks cheaper

 

[Mike_S]

hm well i'll have to see when ripmf666 can get rings to me by 330 is alomst 120 bucks cheaper

So does that mean I have more time to work on your heads? LOL! I got about 8 hours left on them... :thumb:

 

[DIESELMAFIAPER.LB7]

Lol no i got rings i can take them back though:thumb:

 

[DIESELMAFIAPER.LB7]

an no no more time ha cause once the rings are on the studs will be waiting for the heads

 

[DIESELMAFIAPER.LB7]

well short block is pretty much together now waiting on parts

 

[Mike_S]

well short block is pretty much together now waiting on parts

Least 7 more hours dude...LOL!:spit:

 

[DIESELMAFIAPER.LB7]

lol really:thumb:

 

[DIESELMAFIAPER.LB7]

k whats everyone tourqing there headstuds to what the gm specs say 37-59-90*-75* or just what arp has three equal steps to 125ftlbs?

 

[emiller3]

I did 80 then 125.Some say just do 125?

 

[DIESELMAFIAPER.LB7]

well i did 42 then 84 then 125? that's what they said to do but iwasn't sure what everyone else was doing? im only toured to 84 i think i broke my BRAND NEW tourqe wrench so im going to have it checked and get another one before i finsh the tourqe pattern so i know i got to 125 an not more or less

 

[JoshH]

well i did 42 then 84 then 125? that's what they said to do but iwasn't sure what everyone else was doing? im only toured to 84 i think i broke my BRAND NEW tourqe wrench so im going to have it checked and get another one before i finsh the tourqe pattern so i know i got to 125 an not more or less

If the studs are new, make sure you loosen one stud at a time and retorque to 125. Repeat that 3 times so you end up torqueing the studs to 125 4 times.

 

[ripmf666]

The last tq you should let it seat over night then do it.

 

[Mike_S]

If the studs are new, make sure you loosen one stud at a time and retorque to 125. Repeat that 3 times so you end up torqueing the studs to 125 4 times.

Interesting that ARP doesn't call for this, and I haven't heard of it in any other engine build that I have done or been involved in. Guess it really won't hurt anything long as you do one at a time...cheap insurance in case the studs do tend to stretch the first time they are stressed.

 

[DIESELMAFIAPER.LB7]

If the studs are new, make sure you loosen one stud at a time and retorque to 125. Repeat that 3 times so you end up torqueing the studs to 125 4 times.

why is it done that way? so break one loose at a time then retourqe then move to the next? is that right? what a damn pain

 

[DIESELMAFIAPER.LB7]

well the vodo process is done on the heads talk about pain in the ass..rocker arms are on turbo and nozzles show up today bottom has new bolts in it oil pan on getting a little closer

 

[ripmf666]

When I did mine I just cracked them all loose. Not all the way to take pressure off the head gasket just enough to redo the tq ea time. Then we left it over night and just went over each one the not loosening just set at the 125 and went thru the patern they all moved more just from the heat change over the night to day change.


Not sure if anyone has tried it on a Duramax but a trick with a sbc and BBC with alum head are to save from retq after it's been ran with heat. You take a heat gun or 2 if you have them 1 for each side make a heat funnel to all the runners and getthe heads to working temp then redo the tq. It saves alot of time when working on a race car with alot of turbo plumbing and other stuff to remove to to retq the heads.