How do you torque Subaru head bolts?

How do you torque Subaru head bolts?

Tight but not too Tight Loosen all bolts in reverse order. Loosen them again another 160°. Tighten bolts one and two to 25 to 36 foot-pounds. Tighten bolts three, four, five and six to 132 inch-pounds.

What size are Subaru head bolts?

The Snap-on Headbolt Socket for Subaru vehicles (No. S6214) is a 1/2″ drive, 12 point 14mm mid-length specialty tool that is designed to remove and install headbolts on 1995 to current Subaru vehicles.

How hard is it to replace a head gasket on a Subaru?

In most cases, a Subaru head gasket replacement takes two full days. This gives us time to repair, road test and recheck the vehicle. Every so often we run into a parts problem and the repair could take longer.

Can you reuse Subaru head bolts?

They are reusable, even subaru says so. You have very strong steel bolts in aluminum heads with aluminum block, the threads would give out before the bolts would.

Do Subaru head bolts need to be replaced?

When it’s done properly, the head bolts shouldn’t be permanently stretched to their yield point, as they are with the TTY method. For this reason, it may not be absolutely necessary to replace the head bolts. In fact, Subaru service information does not specify new head bolts as part of a head gasket repair job.

Are all head bolts torque to yield?

They provide more consistent clamping loads, across the entire head-to-block mating surface. When a shop manual indicates that a bolt is to be discarded and new ones used; they are almost always torque to yield bolts.

Can I reuse my cylinder head bolts?

A head bolt should not be reused if the threads are galled or badly damaged. 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.

What happens if I reuse head bolts?

An old head bolt that doesn’t allow for proper clamping can lead to leaks in your engine. Coolant will be able to leak through the bolt hole and cause more issues for your engine. One of the largest issues with reusing old head bolts that are past their prime is the risk it creates for your gasket.

Should you replace head bolts when replacing head gasket?

If the head bolts of your engine are the stretch type, they MUST be replaced when reinstalling the head(s). Stretch bolts are for one-time use only. Head bolts should be replaced when you change the head gasket to prevent bolt failure.

What can occur if bolts are not torqued properly?

Another consequence of failing to torque the head bolts properly can be head warpage. Uneven loading created by unevenly tightened head bolts can distort the head. Over a period of time, this may cause the head to take a permanent set.

Do you have to torque head bolts?

Certain types may require you to re-torque the head bolts. And if it’s needed, you should do it. Re-torque the bolts as required while your engine is warm. But if you’re using aluminum cylinder heads, you should wait until your engine is complete cooled until re-torquing.