rb25det - changing headgasket

[sn00p]

i have used the following instructions:

posted on this site

Originally Posted by jomsy

quick rundown on how to do it, remove the following parts

1- fan shroud and engine fan,

2- intake cross over pipe,

3-leave intake manifold on head, just remove fuel hoses, and wiring, and some other hoses you will see then if you forget them when you lift of the head

4- crank angle sensor and covers and make index marks to put them back in the same place

5 all the belts, a/c , steer, alt

6- put motor on top dead center

7- remove balancer and lower cover breaker bar against the chassis and use the starter motor to crack the bolt which is 1-1/16 or 27mm, maKe SURE YOUR IGNITION PACK IS DISCONNECTED.

8- mark camgears and crank gear with liqud paper in (ie put a dot on the gear and on the belt)

9- loosen tensioner and remove belt the tensioner is a 14mm nut and needs an allen key to turn away far enough to remove tension and make it easy to reassemble

10- take of plug cover and rocker covers

11- drop the exhaust at the dump pipe or just use a 17mm open end spanner and remove the turbo from the manifold (4 nuts) and leave the manifold attached to the head

12- remove turbo feed hoses (the hardest bit of the whole job) then you can leave these on and the turbo will hang on the exhaust dump

13- you may have to remove the cams to get to the head bolts just check i can remember its not hard at top dead centre there are indents cast intop the cams to allow you to access the studs with a 10mm hex drive. Buy a good quality one.

14- remove head bolts

15- get someone to help you lift the head off, check nothing is still attached, ie hoses wiring small bolts

16- idealy get the head checked, get a razor blade and scrap away the old head gasket

of head and block then sand it with some wet n dry cleanlyness is the key hear

17- wipe down with a clean rag and re assemble in the reverese order, just torque up the head bolts to correct tensionHead torque settings

These are the specs I used on my last rebuild engines

Head is torqued down in 5 stages.

1. 22ftlbs

2. 72ftlbs

3. slacken off

4. 22ftlbs

5. 75ftlbs

I have undone all the 10mm hex studs where the cams are and can see the other one at the front driver side of the head but am not sure where the other bolts are located...I think they might be under the inlet manifold - Do I need to take inlet manifold off to get at these (whereever they may be)?

Thanks, Ben

[benm]

Damn after reading that i'm glad to be taking mine to a mechanic tomorrow to get done

[riceline]

There are also 2 small bolts up the back of the head that you need to remove. as well as one that sits behind and under your rear cam cover (bit that goes behind the cam gear's)

They are only small but you will not get it off without removing them.

Good luck mate

[sn00p]

i have found one of the which is to the back right of the head, where is the other one located?

Thanks, Ben

[wrxhoon]

there is 3 little bolts ben , 2 are at the rear of the head ( 1 on the inlet side and the other on the exhaust side ) and 1 at the front of the head on the inlet side .