Engine Noise - afraid to ask

[roaniecowpony]

You can take a lenth of PVC pipe and rest it on a surface of the engine and put your ear to the end for a makeshift stethoscope. It usually helps identify the problem area.

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[Swisskidd]

Cams sound good to me but plan to look when I swap the oil cooler

Using a section of fuel hose like a stethoscope could likely help you better localize the source for the noise.

Edit: Looks like @roaniecowpony beat me to it.

 

[roaniecowpony]

Using a section of fuel hose like a stethoscope could likely help you better localize the source for the noise.

Edit: Looks like @roaniecowpony beat me to it.

Hey, give us a peek at that 57.

 

[Swisskidd]

Hey, give us a peek at that 57.

Here you go………
First owner took it off the road in 1966. Two subsequent owners never used it. I was lucky enough to find it in 2020 and sorted it out. Never restored.

 

[jjmarkus]

Standard Trans? Sounds like the rattle of a worn throwout bearing. Does in go away when you engage the clutch? Even if throwout bearing, it'll go for a longtime making that noise.

 

[mwilk012]

RTV.

 

[Shellbird01]

A few fine flecks in the pan, oil pump sump screen is clear. More varnish that I thought. Holy dip stick, yesh.

Any suggestions from here? Thinking oil pump chain or cam chains / tensioners.

was wondering if I’d find an oil galley bolt down there….

 

[mwilk012]

It would be a good idea to Inspect the flywheel while you have access. Turn the engine over 1/2 turn.

 

[mwilk012]

Didn’t notice anything out of place, gonna borescope too

Man I hope it’s just something cheap like that, even if it is a good amount of labor

 

[mwilk012]

Dang. Those are large pieces, looks like bearing material.

 

[Shellbird01]

Pulled the rod bearing lowers tonite, some wear but certainly not catastrophic. The rods look fine, nothing out of place.

Thinking I’ll pull the head covers check the cams. If nothing there do I consider pulling the crank mains…. Not feeling good about that one.

 

[DaltonGang]

Pulled the rod bearing lowers tonite, some wear but certainly not catastrophic. The rods look fine, nothing out of place.

Thinking I’ll pull the head covers check the cams. If nothing there do I consider pulling the crank mains…. Not feeling good about that one.

I dunno, that looks like a lot of scratch marks to me. But, I'm not a professional mechanic. My guess would be cam/lifter being the culprit, as others have guessed.

 

[jeepingib]

Pulled the rod bearing lowers tonite, some wear but certainly not catastrophic. The rods look fine, nothing out of place.

Thinking I’ll pull the head covers check the cams. If nothing there do I consider pulling the crank mains…. Not feeling good about that one.

Our rule with bearings is that if the lead of a mechanical pencil can be caught by it, then it's scratched and should be replaced. Used to be fingernail, but we went finer for the tighter tolerances.

 

[jeepingib]

Noticed metal when cleaning out the oil this am, looks like a lot to me, but frankly it’s the 1st oil pan I’ve removed? will pull the oil pump and windage tray and do some borescoping.

That's a lot of glitter. You are going to need to do a thorough teardown and inspection. It's hard to tell from the picture what kind of metal that is. If you can, I'd send a sample to the lab, at very least check if it's magnetic. Does the oil feel thin between your fingers? You can do the old paper test for possible fuel dilution. take a piece of sheet paper and lay the edge on a drop of oil vertically. If there is fuel in the oil it will wick up the paper.

 

[jeepingib]

One piece was magnetic, the others probably aluminum. Fuel dilution - thinking there’s an injector stuck open?

Hard to say at this point. Just checking for potential signs of loss of lubricity to account for the damage shown.

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