What am I overlooking?

[datzenmike]

Squirt a couple of teaspoonfuls of motor oil in and retest. If the compression jumps up then the rings are bad on #3

[Hooligan]

Yeah Mike that was with oil in the cylinders. Gonna pull the motor and do a full rebuild

[flatcat19]

What were the numbers dry?

[q-tip]

SON OF A BITCH!!!!

 

 

 

 

There, I said it for ya man

[Hooligan]

Its all good man.... keeps me on my toes

[datzenmike]

SON OF A BITCH!!!!

 

 

 

 

 

 

 

I always here

saying that

[ggzilla]

Engine will start and run well with 122 psi

[dr.feltersnatch]

If it was even maybe. That much difference between cyl I wouldnt think it would run very smooth.

[Driftease]

Either way the engine should start and put around a little. That is a rather large spread of compression indicating major problems, still it should be able to run however badly.

[dr.feltersnatch]

Agreed

[q-tip]

I agree with the above, it may have low compression but it still has enough to do SOMETHING that resembles life

[datzenmike]

Welllll...... double checked and the engine has spark. Valves are adjusted... then, well then.... did a compression test. Cylinder 1 - 192, Cylinder 2 - 155, Cylinder 3 -122, and Cylinder 4 - 145

 

The cylinders should be within 10% of each other or it will chug. Yes even 100 across all cylinders will run smooth but lack some power.

[Driftease]

Could be carbon blocking the valves (some of them) open. My advise would to be getting it running first, romp on it a bit then recheck compression before pulling the motor. If your valves were extremely loose before adjusting them that would be a good indicator of something not allowing the valves to close all the way

[banzai510(hainz)]

If your valves were extremely loose before adjusting them that would be a good indicator of something not allowing the valves to close all the way?????

You mean valve lash too tight I think.

 

going by the readings it should run.

Its soemthing else. dont pull motor

 

 

what timming light say in the middle of the timming plate.???? if one has to crank the dizzy hard to gt it in time then that wherew your proplem is . reck the spindal or recenter your timming plate under the dizzy.So you have more adjustment when you center the timming plate on the front cover

[Hooligan]

Well guys... I appreciate all of the advice. I have Sunday off so I will spend the day digging into this before pulling the motor and see what I can find

[ggzilla]

Pull the motor? Best to troubleshoot it while installed. Much harder to do once its out.

[Driftease]

If your valves were extremely loose before adjusting them that would be a good indicator of something not allowing the valves to close all the way?????

You mean valve lash too tight I think.

 

going by the readings it should run.

Its soemthing else. dont pull motor

 

 

what timming light say in the middle of the timming plate.???? if one has to crank the dizzy hard to gt it in time then that wherew your proplem is . reck the spindal or recenter your timming plate under the dizzy.So you have more adjustment when you center the timming plate on the front cover

By the valves being loose I meant excessive clearance between the valve and rocker due to the valve not closing all the way, too tight would be the rocker holding it open.