8v SOHC swap

Israel · Post by **Israel** » Tue Aug 03, 2010 5:38 pm

I just bought a 92 MM with the 2.4 SOHC motor. I got a good deal on it because the timing belt broke and ruined the head. My long-term plans are to build up the motor into a 2.4L DOHC turbo motor, but for now, I just want to get it running with a good, used head. From the Engine Look-up Chart, it appears that I have a wideblock, 6 bolt (built in Feb. 02), non-MCA Jet head. My local yard has a 8v head off a 91 2.0L Galant that I believe is also non-MCA. Do you think this head will fit?

Thanks in advance for your time!

Verdad · Post by **Verdad** » Tue Aug 03, 2010 6:42 pm

i believe that the engine is a non-interference setup. I'll double check my manual when i get home, but if it was just a broken timing belt, then you should be able to just slap a new belt on and be good to go.

Israel · Post by **Israel** » Tue Aug 03, 2010 7:28 pm

I hope that's the case, but I've already thrown a new belt on it and tried starting it. It turns over like it has no compression at all. Of course, it's possible that I may have done the belt wrong, or the previous owner wasn't fully honest about what was wrong with the engine.

77amc · Post by **77amc** » Tue Aug 03, 2010 9:55 pm

Your head probably bent all the exhaust valves.
Another thing is that sometimes the oil pump belt shreds and takes out the timing belt or visa-versa. Was the oil pump drive belt OK?

Braking the belt usually doesn't mess up the head, just the valves..
BUT, just pull a cam tower off to check to see if the cam seized in the head causing the breakage.
How many miles is supposedly on the motor?

E

Israel · Post by **Israel** » Tue Aug 03, 2010 11:10 pm

The balance shaft belt was fine, just the timing belt broke.

A cam tower? I'm accustomed to DOHC stuff, so I'm not sure what a cam tower is on a SOHC head. I could pull the valve cover off and check for bent valves, I suppose.

The odometer shows 146,000 miles, but it could be on it's second motor for all I know.

Thanks for the help so far, guys!

OLDIE · Post by **OLDIE** » Mon Aug 30, 2010 5:24 pm

77amc wrote:Your head probably bent all the exhaust valves.
Another thing is that sometimes the oil pump belt shreds and takes out the timing belt or visa-versa. Was the oil pump drive belt OK?

Braking the belt usually doesn't mess up the head, just the valves..
BUT, just pull a cam tower off to check to see if the cam seized in the head causing the breakage.
How many miles is supposedly on the motor?

E

Sorry mate but you are wrong when you say "bent exhaust valves " all 8 valve single cam 4g motors are not interference motors meaning that there is no danger of bending valves if the cam belt breaks BUT do the same in a twin cam then you will need new valves BEEN THERE DONE THAT WITH BOTH TYPES

lsr mike · Post by **lsr mike** » Mon Aug 30, 2010 11:51 pm

92 2.4 is an interference motor It's a 1G.

I have the broken #1 Exhaust Rocker arm to prove it.

and in reference to what it looks like under the valve cover...

http://mmeierle.com/images/Max/Blue%20E ... %20cam.jpg