Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

John A. When you put your ARP head studs in, did you follow

Guest Anonymous

Recommended Posts

Guest Anonymous

ARP's recommended method of hand threading the studs into the block? I'm confused here. I've read your posts about studs and it seems I should put the studs into the block so that the stud sholders are not bottoming out on the deck and then use some locking compound to hold them in place.

The ARP folks say to put lube on both ends, hand thread them into the block deck and then torque to spec. I know the stud continues to turn as I torque it and I'm certain it is bottoming out. Am I missing something?


John N

Link to comment
Share on other sites

Guest Anonymous

Well, best I can remember..

The ARP instructions are to be followed, esp. with regard to the lube on the top threads (where the 12 pt nuts are fitted.) Their torque specs depend on the specific lube used -- different values for using engine oil vs their special lube. The less friction (due to the special lube), the higher clamp load for the same tightening torque.

IIRC, I used engine oil to lightly lube the bottom threads before hand-installing them into the block, then the special lube on the top.

Yes, the shoulder portion of the stud does reach the block, but it does not really get "torqued" into it.

Some of this will depend on the chamfer on the bolt holes on the block -- did you clean the threads with a chaser and also dress the chamfer at the top? A good fit here might minimize the spin of the stud.

The bottom threads are M12x1.75, and the top threads are M12x1.25. This combination makes it harder for the stud to continue turning into the block, it should not be a real problem. Just prep the hole and be careful, you should see the stud stop turning long before things get real tight. Not much else you can do there, I've seen no ill effects on teardown.

Note how one stud will interfere with the cam cover's breather baffle. You need to grind down one of your fancy ARP fasteners to get clearance.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

  • Create New...