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

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Originally Posted by repoman3809

LOL....aint that the truth!

i do not get it ? did they wall us in...... here in mi ? roads still working ?

Originally Posted by pat mccarthy

i do not get it ? did they wall us in...... here in mi ? roads still working ?

Well, it was more about "today" comment. Little hard to pull a motor, then make the 6 hour drive though Ohio to MI, all in the same day.

you going to pull it? hey that liberty recovery thats repo deal only ..is that racer als brother

I plan on completing the compression test, running a leakdown and then pulling the timing cover. Just to know the exact issue(s). I did talk to the dealer. Not much help. He offered his rebuild services. Supposed to get back to me on exact cam size.

I will be pulling if necessary. If that's the case, I'll likely be doing some business with you Pat. It's gonna take some time though. The boat, as it sits in dry dock, is roughly 8ft high. I used a bobcat for the last motor replace, but the boat was on a rented trailer. I barely had enough height then. This time it sits higher(on blocks) and I may need something else to get the motor out.

Originally Posted by repoman3809

I plan on completing the compression test, running a leakdown and then pulling the timing cover. Just to know the exact issue(s). I did talk to the dealer. Not much help. He offered his rebuild services. Supposed to get back to me on exact cam size.

I will be pulling if necessary. If that's the case, I'll likely be doing some business with you Pat. It's gonna take some time though. The boat, as it sits in dry dock, is roughly 8ft high. I used a bobcat for the last motor replace, but the boat was on a rented trailer. I barely had enough height then. This time it sits higher(on blocks) and I may need something else to get the motor out.

man at the boat yard i work at we did some.. heavy ...dock work. i did the heads on a house boat . fun fun all i could thing about was droping the head in the water . did some velvet drives and ex logs them heavy iron pigs . right after i left the boat yard to work at a body shop. they lost a bbc engine on a pick. drop it on one of the yard guy foot and he lost his toe

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

Update....with pic.

I pulled balancer and timing chain cover. Before doing so I made sure I was set TDC. The crank and button were both right.

After the pic, I put the balancer and cover back on. The balancer mark was still on 0.

Timing Chain4.jpg

You know the picture is 180 out

You know the picture is 180 out

Not at TDC on #1....right? When the marks are at 6 o'clock on cam and 12o'clock on crank, your TDC on #6.

The 12o'clock / 12o'clock(pictured above) is TDC on #1. Right?

I really, really, really, hope your right and I'm wrong. That would be great.

Charlie is correct. Cam dot needs to be at 6 o'clock & Crank dot needs to be at 12 o'clock with # 1 cylinder @ TDC. (IMHO!)

Originally Posted by 34_40

Charlie is correct. Cam dot needs to be at 6 o'clock & Crank dot needs to be at 12 o'clock with # 1 cylinder @ TDC. (IMHO!)

Again, I sure hope so.

I got to searching the net after I seen Charlie post. I figured what was in the pic was right.

Upon searching the net I got mixed results, but more seemed to say 12 and 12 o'clock was right for #1 TDC. I even found a shop manual pic.

Now I see your post, I'm just confused. LOL

yep 180 out but still need to fix the low cranking psi on the one bank .mark 5 or 6 block ? if thats a mark 6 with a flat lifer cam in it ?. i am short blocking the 330HP mark 6 merc roller engine right now