Can i reuse arp head studs

Chasing damaged head bolt threads with a die will clean up the threads but also remove material metal and undermine the head bolt's ability to torque down and hold to specs. On the top end of the scale we have racing engines where a fastener failure can mean a lost race, and on the bottom end of the scale are garden-variety engines with less critical demands.

It's the same rule as when someone is shopping for a used car; the mantra is, "condition is everything. The best-known aftermarket manufacturer of premium-quality head bolts used for racing and high-performance street applications is ARP Automotive Racing Products , and ARP head bolts can be reused. That said, a thorough engine builder will closely examine the condition of all fasteners being reused, including ARP head bolts.

Condition is everything; this ci Chevy small-block V-8 received a new Edelbrock top end and new ARP head bolts to hold the Edelbrock cylinder heads down. The original OEM head bolts could have been reused were they not rusted from a leaking head gasket in the ci Chevy engine's previous life.

You bought a used high-performance engine and the seller said it had all the good parts. If that is true, the engine will have ARP bolts fasteners throughout, and that can be proven by reading the head of the bolt and finding ARP stamped in the bolt head. They subsequently sent me an email as well reiterating the same thing: "As long as you have not exceeded the recommended torque for that fastener, and it takes the torque and does not feel spongy, the stud should be fine.

Hopefully this will be helpful to some of you guys. Sort by date Sort by votes. Upvote 0. Cs4g63 Proven Member. I never thought of it before but where would you be able to pick up individual head studs.

All of the head studs I have seen come in a full kit. It would suck to have one go bad and in order to fix the problem you have to buy another full kit, but at the same time it would give you a lot of extra ones for if it happened again. Again just a thought. Yeah, I don't think you can buy them individually. Which illustrates even more the importance of not exceeding their recommended torque specs.

DSMunknown Proven Member. If anyone is wondering, this thread also has some info about reusing ARP head studs. You must log in or register to reply here. Similar threads. Question ARP head studs? Replies 3 Views Question arp head studs. Replies 2 Views Nov 12, andytalon. Replies 1 Views After test fitting the studs in the block, it is generally easier to remove the studs, put the head gasket and head on the block and install the studs.

This will reduce the possibility of damaging the upper threads of the stud and scraping the cylinder mounting holes.

If the block has no alignment dowel pins, you can use the stud to align the gasket and head. The chamfered side of the washer goes up, towards the head of the bolt. The chamfer is there to create clearance for the radius between the bolt shank and the bolt head. Yes, cylinder head studs are installed only hand tight. Other than the use of an allen wrench on the hex broached into the end of the stud to ease installation, not to apply torque , use no tools to seat them in the block.

However, it is extremely important to ensure that the studs are fully bottomed out in the hole in the block and not hung up on damaged or corroded threads in the block preventing the stud from being fully seated. This is often indicated when the stud threads extend past the deck surface. I have heard that some people have had trouble with newly installed cylinder head studs leaking water. Prior to installing your new head studs, it is very important that you have clean threads on both the block and the studs.

First, clean up all the threads in the block with a thread-cleaning chaser, NOT a regular tap. Thread chasers are designed so that they do not remove material from threads but merely remove debris and corrosion. Make sure you go all the way to the end of the threads in the bottom of the hole.

Then clean out all the holes in the block with brake or carburetor cleaner to remove all the debris. Make sure the threads on the new studs are clean.

Use a liberal amount of ARP thread sealer, high temp silicone or Loctite to ensure that there will be no air pockets that can cause leaks. Then follow the ARP instructions for installing the fasteners. Sometimes ARP will recommend using torque specifications that are different than the manufacturer, but not always.

To achieve our target clamp load, it may be necessary to use a different torque figure than what the factory calls out.

Which specification do I use? Custom Age is an austenitic alloy that has a tensile strength of , PSI, providing a greater clamping force than that of ARP Like most high-strength quench and temper steels, L19 requires special care to avoid hydrogen embrittlement or stress corrosion.

The material is easily contaminated and subject to stress corrosion. The parts must be kept well oiled at all times and not exposed to moisture.