Help me figure out why cyl 1 has 0 compression….

[TheVintageVw]

I’m not seeing it so far….. I was sure the rings were toast. They look good….

[VW_Jimbo]

What are you running for fuel delivery? Spark? Got any pictures Of your engine?
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[Tvättbjörn]

There is lots of oil in that cylinder. Are your oil rings still moving? The adjustment screws on the right side in the picture look a lot more tight. Burned / defective valve seat? Do you have your valves adjusted correctly?

[TheVintageVw]

[TheVintageVw]

[Tvättbjörn]

with so much dirt on your engine. Measure your cylinder i.d. to see if it is still round. Maybe it did overheat due to having no cooling.

[Tvättbjörn]

[Lo Cash John]

Pour liquid gas into the combustion chamber (head sitting with chamber facing up obviously) and see if it holds liquid for any amount of time or leaks out right away. That's a quick valve test.

Do rings still have tension (springy and stiff) or are they soft bendable?

Were the wrist pin clips still in place when you pulled it apart?4


I just have to ask, why would you pull apart such a nasty engine without COMPLETELY washing all the dirt and debris away first? Thinking of the particulates and contaminates now inside that case is going to trigger my OCD for days...
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[oprn]

1)Dirty engine causing it to overheat badly in that Bus.

2)Overheated rings with no tension left.

3)Cylinder is scored badly as is the piston skirt.

Where did all the dirt come from to do that damage? Running tar for oil and the filter is bypassing most of the time?
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[TheVintageVw]

[TheVintageVw]

[raydog]

That thing looks used and abused. What is that screwed into the #2 plug hole? A plug anti foul adapter? It's got to be the rings or loose head. Being a work vehicle on a farm, probably never got much maintenance by the looks of it. Did you pull the oil screen and see how much sludge is in the sump?
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[TheVintageVw]

yeah the screen was pulled, no sludge. Flashlight into the case also shows its pretty darn clean.

Its the compression gauge adaptor. thats screwed into #2.

[Pruneman99]

How much deck did that thing have?.

[Chickensoup]

did some retard put shims on only 1 cylinder?
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[TheVintageVw]

didnt check the deck...

If you notice in the photos there is fuel on top of the pistons. Wouldn't that effect compression? but 0?

[QRP]

Well at this point with all that dirt and crap getting into the block the compression debate is basically over.
Strip down the entire motor and start over!!!!

But that's just me.

[RCP Phx]

[Glenn]

It would of been better to do a leak down test before taking it apart. It would of let you know if it was the intake, exhaust or rings.
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[ept000]

I still want to know why the valve adjuster screws look so much further down into the rocker arms on that cylinder.....

It's not pulling the rocker shaft studs, is it?