Knock, Knock, Whos There? Help!

[deathraider6996]

Fire ring appears split and distorted between cylinders in one of the pics. Pistons are wet and oily. Likely running rich...and what heat range were the plugs?

Delco 43 gapped 35

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[deathraider6996]

I'm betting the sludge in the bottom is bearing material. Can you feel any ring ridge with your fingernail?

I tried go ogling what a ring Ridge is but with no luck

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[deathraider6996]

Driver side



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[Pyro6]

I'm betting the sludge in the bottom is bearing material. Can you feel any ring ridge with your fingernail?

I tried go ogling what a ring Ridge is but with no luck
It's the area at the top of each cylinder where the piston or ring do not travel. In your pictures, portions have a rust look to them. Sort of like the rust ridge on a brake rotor. We use a ridge reamer to cut it back on overhauls.

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[deathraider6996]

I'm betting the sludge in the bottom is bearing material. Can you feel any ring ridge with your fingernail?

I tried go ogling what a ring Ridge is but with no luck
It's the area at the top of each cylinder where the piston or ring do not travel. In your pictures, portions have a rust look to them. Sort of like the rust ridge on a brake rotor. We use a ridge reamer to cut it back on overhauls.

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I'll remember to bring that up to the machinist. I still need to find where this metal came from.


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[reality]

 Just going by those pictures that motor is beyond "reaming". To me it looks like the heads have been lifting for a long time.
 Going to be interesting to see the bottom end.

[deathraider6996]

Just going by those pictures that motor is beyond "reaming". To me it looks like the heads have been lifting for a long time.
 Going to be interesting to see the bottom end.

To me, it doesn't look like rust. More like carbon buildup and discoloration. Not saying it doesn't need to be reamed I'm just saying I think reaming it will work it out.

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[larrym]

Yes bearings will tell a lot make sure you mark and number the rods and caps when you take them apart either with a punch or a sharpie so they go back in same spot the same orientation

[Pyro6]

Just going by those pictures that motor is beyond "reaming". To me it looks like the heads have been lifting for a long time.
 Going to be interesting to see the bottom end.

To me, it doesn't look like rust. More like carbon buildup and discoloration. Not saying it doesn't need to be reamed I'm just saying I think reaming it will work it out.

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You're only reaming the top of the cylinder. As was mentioned earlier, can you catch your fingenail on it? The other rust discoloration on the cylinder bore needs to be measured to decide if it needs be bored on honed.

[Scoobum]

The cylinders will taper on a higher mileage engine...wider at the top. Clean the top of a piston off. Find out if it's over bored.

[Steve Wood]

I'm betting the sludge in the bottom is bearing material. Can you feel any ring ridge with your fingernail?

I tried go ogling what a ring Ridge is but with no luck

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http://www.freeasestudyguides.com/ridge-reamer-engine-block.html

drop piston down in the cylinder and little, then run your finger nail up the wall toward the top.  You will feel the ridge as shown in the picture.  trying to drive the piston past this ridge can break the ring or piston lands doing more damage to the cylinder as well as messing up the piston.

I am pretty sure that the block will need to be bored oversize and new pistons/rings will be required anyway, but it's good practice to avoid messing up anything you don't have to....

[Steve Wood]

note what Larry said above, the caps have to go back on the rods that they came off...so mark them so they cannot be mixed up

[deathraider6996]

If the bearings are offset that is to show that they were very loose

















Top to bottom 123456



Left to right 123456












Number 4 was spun and smashed



Left to right 1234


Rod 1


Rod 3


Rod 5


Rod 2


Rod 4


Rod 6



Blehh thanks in advance guys.

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[Steve Wood]

I suspect those rods will all need to be resized.  Only the machine shop can tell if the crank can be turned and reused.  It is perfectly fine to turn a crank down 0.030" if that is what it takes to save it.

[deathraider6996]

Well, I just need to finish tearing down the block to bare then I can bring it up to Phoenix.

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