Thread: Harmonic balancer on 454 has 4 timing marks.....

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I had a little spare time this evening and finished the compression test. Again, I had charged batteries, TP opened, disconnected fuel and ign and no plugs in. Here's the readings:

1=67psi l 2=120psi
3=65psi l 4=122psi
5=80psi l 6=113psi
7=31psi l 8=72psi

I didnt bother adding any oil. I did start pulling apart the front on motor(pulleys, belts, water pump). I got down the harmonic balancer(didnt have a balancer pulley on hand). Will check the timing chain as soon as I get one.

Originally Posted by repoman3809

I had a little spare time this evening and finished the compression test. Again, I had charged batteries, TP opened, disconnected fuel and ign and no plugs in. Here's the readings:

1=67psi l 2=120psi
3=65psi l 4=122psi
5=80psi l 6=113psi
7=31psi l 8=72psi

I didnt bother adding any oil. I did start pulling apart the front on motor(pulleys, belts, water pump). I got down the harmonic balancer(didnt have a balancer pulley on hand). Will check the timing chain as soon as I get one.

yep you may have bent valves . bbc can not stand much lift and duration with some pistons.yep oils not going to help them holes .i would pull it or pull the heads and timing cover off or just pull the engine out . but with heads off be less weight to play with it your call .l would bit the bullet and pull it

yep you may have bent valves . bbc can not stand much lift and duration with some pistons.yep oils not going to help them holes .i would pull it or pull the heads and timing cover off or just pull the engine out . but with heads off be less weight to play with it your call .l would bit the bullet and pull it

Yeah my thought too. I'm going to do a leakdown anyways. Then I'll pull the balancer and timing cover. Sure that will tell all I need to know. Amazing thing(or at least to me) is that once I got it started, it actually ran well. No load on the motor, but it revved good and idled decent around 1200.

I wish I would have done the compression test the first day I bought it. I'm not even blaming the dealer. I screwed up! But again, lesson learned.

Hopefully I can get out of this with a smile.

Crazy I happened to test the left side first. 2-4-6 were acceptable, 8 made me get ticked and quit the test.

After returning a few days later and seeing 1-3-5-7. I wasnt as mad, I already came to grips with the worst.

If I would have completed the whole test the first day. I might have really put the screws in the cylinders and fired her up. Us repo guys tend to have a short fuse. LOL