Cylinder head tightening procedure
 

Need help!!

Does anybody know the torque/procedure for cylinder head bolts on a my99 uk turbo

Thanks Lee

Not sure on the torque settings, but with any head you should work from the inside and work your way out in a spiral pattern to prevent the head from resembling a bannana ;)

I have it here, will find it and post in a bit.

here you go.

Tightening sequence of bolts:-


.................exhaust side...................
.....................3 1 6..........................
front of engine......... Rear of engine ....
.....................5 2 4..........................
..................inlet side........................


Then tighten torque and angle in the following stages, in the sequence above

1. 29 N/M OR 22 FT/LB
2. 69 N/M OR 51 FT/LB
3. BACK OFF 180 DEG. (REVERSE SEQ 6-1)
4. BACK OFF FURTHER 180 DEG (REVERSE SQ. 6-1
5. RE TORQUE 29 N/M OR 22 FT/LB (1-6)
6. 80 TO 90 DEG. (NOT OVER 90)
7. 40 TO 45 DEG. (NOT OVER 45)
8. NO.1 AND NO.2 40 TO 50 DEG. FURTHER (NOT OVER 50)

Step 1-2 are basically for settling the gasket, as step 3-4 pretty much take all the torque off. Put a little bit of oil (or better still a small blob of moly grease) on each bolt thread.

Don’t guess the angles. Get an angle disc for your torque wrench.

that is wrong im sure 2 of the bolts are a different torque to the other 4 but cant find it think its the centre 2 that are a lesser torque to start with

http://www.saxonfields.freeserve.co.uk/

Try this for manual shows sequence and torque settings , open page up and click on subaru , then engine and you have chose of files to open 93-96 , 97-98 ,for head sequence this will be the same for 99

hope this helps

Mark

the last step says tighten bolts 1 and 2 only 40 to 50 degrees more;)

This is torque sequence and settings RCM use, and i think they know a thing or two about building a reliable engine. Wether its the same as subarus i know not but i know which one i would rather trust.

I used this anyway, and running a peach for 8K now at over 400 BHP, with standard bolts and gaskets.

:thumb: cheers