Re: '55 engine back to life! Mostly worked...
Posted by Bob E. On 2018/8/12 19:47:38
Yes, I do realize that I am an idiot. Before I installed mechanical fuel pump, i put a paper towel in the opening to keep crap from falling inside. I must have forgotten to pull it out.
So good thing I have this hollow knock sound that I have been chasing as it led me to pull the pan and find this mess now.
Pulled rod bearing caps 1,2,4. Pics attached. Some slight wear evident but I would think there is an initial break in with new bearings and machined journal and this would be okay. Seem like plenty of oil everywhere.
I mentioned in a previous post a little evidence of vertical scuffing in a couple of the cylinders and some wear evident on those piston skirts. Probably doesnt sound normal,??
I have seen no evidence of paper anywhere but in the pan and all over the inlet screen. Without a doubt, some of the paper towel must have 'extruded' itself through the screen in tiny bits.
Next step is to pull the heads. Those are easy enough to clean up and I am curious if there is any debris in the ports between the block and heads. I'll pull the rocker arm assemblies apart and give them (arm, rockers themselves etc) a good cleaning.
I don't know what dissolves paper towel, so I'm thinking I'll buy a new inlet screen for the Old high vol pump as I won't be able to get all the paper out of the screen. I assume I can buy those separately from the pump?
1 step forward, huge few steps back! But I'll get there.
Since I got this think mostly apart, I see that Jack has an updated cam retainer plate for sale. My understanding is that the mod allows more oil to flow past it. With the Old high volume mod (and no paper towel...) would that plate still be worthwhile? Again, there seems to be plenty of oil everywhere in this engine.
But I still can't figure out where this cam-speed noise is coming from. Maybe pulling the heads will help.
Thanks to all for reading and esp to those that are replying. Your willingness to share and your advice is crucial to me getting this back on the road. BTW, if anyone wants to hear an audio recording of this elusive sound (small file size), PM me your email address.
Attach file:
(190.17 KB)
(144.19 KB)
(151.01 KB)
(204.65 KB)
So good thing I have this hollow knock sound that I have been chasing as it led me to pull the pan and find this mess now.
Pulled rod bearing caps 1,2,4. Pics attached. Some slight wear evident but I would think there is an initial break in with new bearings and machined journal and this would be okay. Seem like plenty of oil everywhere.
I mentioned in a previous post a little evidence of vertical scuffing in a couple of the cylinders and some wear evident on those piston skirts. Probably doesnt sound normal,??
I have seen no evidence of paper anywhere but in the pan and all over the inlet screen. Without a doubt, some of the paper towel must have 'extruded' itself through the screen in tiny bits.
Next step is to pull the heads. Those are easy enough to clean up and I am curious if there is any debris in the ports between the block and heads. I'll pull the rocker arm assemblies apart and give them (arm, rockers themselves etc) a good cleaning.
I don't know what dissolves paper towel, so I'm thinking I'll buy a new inlet screen for the Old high vol pump as I won't be able to get all the paper out of the screen. I assume I can buy those separately from the pump?
1 step forward, huge few steps back! But I'll get there.
Since I got this think mostly apart, I see that Jack has an updated cam retainer plate for sale. My understanding is that the mod allows more oil to flow past it. With the Old high volume mod (and no paper towel...) would that plate still be worthwhile? Again, there seems to be plenty of oil everywhere in this engine.
But I still can't figure out where this cam-speed noise is coming from. Maybe pulling the heads will help.
Thanks to all for reading and esp to those that are replying. Your willingness to share and your advice is crucial to me getting this back on the road. BTW, if anyone wants to hear an audio recording of this elusive sound (small file size), PM me your email address.
Attach file:
(190.17 KB)
(144.19 KB)
(151.01 KB)
(204.65 KB)
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