8 replies to this topic

[franklinstower]

I got my cometic hybrid gaskets and now I am ready to put the heads on.

The 2.2 headbolts are longer than the 2.5 head bolts. Use the 2.2 bolts?

How much oil on the threads of the bolts, just a few drops or coat them good? Will too much oil on the bolts cause hydraulic locking and inaccurate torque specs?

Since this will have higher cylinder pressure than a normal 2.2, should I use the torque specs of the EJ22T?

Thanks,
Paul

[MilesFox]

general rule is to use the bolts and torque sequence for the heads you are using. Ithis is how i did on a frankenbuild 2.5 with 2.2 heads.

Oil the bolts enough that it coats the threads, but not so much that is tis dripping.

I just dipped the bolts in a bottle of oil and shook them off before installing them.

[cal_look_zero]

You also want to get a bit of oil on the washer/bolt head surface. The torque specs are for a "wet" torque. Doing it dry causes more friction and inaccurate torque readings.

Ej22 heads means EJ22 bolts and EJ22 torque specs.

[franklinstower]

One more question regarding my '98 ej25 block with '92 22 heads build:

 

I had a collapsed HLA that wouldn't pump up (in a jar with oil), so I went to the PnP to get some new/used HLA's.

 

There was a '97 wagon at the yard with an EJ22. That wagon had the (Obd2) single port exhaust heads on it with non adjustable roller rocker shafts - it had HLA's and roller rocker shafts? I thought all roller rocker shafts on the EJ22's had adjustable lash adjuster? I would assume those cams are designed to run the roller rockers and are not interchangeable with the cams from the Obd1 dual port heads. 

 

So is there any benefit in my Frankenmotor to run those cams with the HLA roller rockers from that '97 wagon in my '92 heads? Are the cam profiles the same between the two heads?

 

Thanks,

Paul

Edited by franklinstower, 11 February 2013 - 07:00 PM.

[MilesFox]

roller rocker would be considered and upgrade and gives you better options for aftermarket cams.

[Crazyeights]

One more question regarding my '98 ej25 block with '92 22 heads build:

 

I had a collapsed HLA that wouldn't pump up (in a jar with oil), so I went to the PnP to get some new/used HLA's.

 

There was a '97 wagon at the yard with an EJ22. That wagon had the (Obd2) single port exhaust heads on it with non adjustable roller rocker shafts - it had HLA's and roller rocker shafts? I thought all roller rocker shafts on the EJ22's had adjustable lash adjuster? I would assume those cams are designed to run the roller rockers and are not interchangeable with the cams from the Obd1 dual port heads. 

 

So is there any benefit in my Frankenmotor to run those cams with the HLA roller rockers from that '97 wagon in my '92 heads? Are the cam profiles the same between the two heads?

 

Thanks,

Paul

I am pretty sure the Roller/HLA EJ22 was only done for a short time in '96 and '97.

[Fairtax4me]

95, 96, and early 97. 97 they went to the SLA rollers. Don't mix roller cams with tappet rockers or vice versa.

[franklinstower]

So it is correct that I can install the cam and roller rockers together as a set (from the '97) into the early heads with no problems. just don't mix and match the early to later cams and rockers?  Is there any benefit to using the roller rockers & cams over the stock '92 cams and rockers?

[ShawnW]

So it is correct that I can install the cam and roller rockers together as a set (from the '97) into the early heads with no problems. just don't mix and match the early to later cams and rockers?  Is there any benefit to using the roller rockers & cams over the stock '92 cams and rockers?

That is correct.  I have done this quite a few times but ideally I use the cams and all its parts from the same head to guarantee the cam won't seize in the head.  It hasn't happened yet but it is possible to have one that the head doesn't fit perfectly with.