D3 Cat has no intake suction

I have a used 1979 D3. Because I would be using it in warm weather, I used a group 27 truck to start it. It worked fine

It started using anti-freeze. I discovered a leak on the timing cover where it meets the block. That cover is about part #3 in the assy process of the engine. I decided to postpone repair till spring 2017 as I had a 1/2 completed project with it.

I constantly checked the engine oil for signs of leakage into that. None ever showed up.

I stopped the Cat on a Sunday and went to use it again the next weekend. It would turn about 1/2 a rev then stop. Turning the key off and on again, it would do the same.

After trying many things, extra batteries, etc, I went out and bought the correct full sized battery. The same thing happened except there was a metallic bang when it stopped after 1/2 a turn. I tried once more, same thing. Damage probably done...

I waited a day and loosened all the injector pump fittings just in case it was getting hydrostatic lock from diesel fuel. Now it would turn at the normal speed. A quick shot of ether produced nothing.

I then disconnected the intake connecting hose and laid just 2 fingers across it while trying to start it. Nothing. Nothing even with it completely covered. No exhaust pressure either.

Ideas? Whatever is wrong has to be affecting all cylinders. It is a 3204 DI engine

Steve

one guess would be the camshaft drive gears--pull the valve cover and see if the valves are moving

(quoted from post at 13:06:35 12/28/16) one guess would be the camshaft drive gears--pull the valve cover and see if the valves are moving

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in the spring, I will pull the valve cover. Being a small machine, things are tight. the heavy hood will need my backhoe to remove, then the muffler.

If there was no cam drive, then some valves would be open causing air movement in the intake and exhaust that I would be able to feel. Additionally, with some cylinders compressing, and some just pushing air around with 1 or more open valves, when cranking, the starter would speed up and slow down due to the load being unequal.

My guess is that something is affecting all cylinders equally. My thoughts: Pistons all broken and in the oil pan, all pushrods bent bad enough that no valves open, rocker shaft mounting bolts all sheared off so the shaft rose up preventing any valves from opening.

Any other thoughts? Anyone?

(quoted from post at 18:17:03 12/28/16) ?

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Go to www dot acmoc dot org and ask there.
A bunch of cat people are there.

i removed the hood on my D3B by just sliding it off. you could pull the injectors and using thin wire check each piston for movement??

Hi, I had a similar thing happen with a Case 188d
engine. It turned out the cam shaft broke at the
gear end. Everything seized! Pricey fix. Ed Will
Oliver BC

Hi, I had a similar thing happen with a Case 188d
engine. It turned out the cam shaft broke at the
gear end. Everything seized! Pricey fix. Ed Will
Oliver BC

You should be able to hear if the engine has compression or not while cranking it over without removing the valve cover and hood. Otherwise
hook a clamp amp meter to the battery cable and watch it as the engine cranks over. It should fluctuate as each piston comes up on
compression. You say it started using antifreeze? It sounds like to me that antifreeze has gotten in on top of one or more pistons and that's
causing your hydraulic lock and not letting it crank over. Drain th engnine oil and see if antifreeze comes out first before oil starts
flowing. BTDT. Let us know what you find.

(quoted from post at 06:37:30 01/01/17) You should be able to hear if the engine has compression or not while cranking it over without removing the valve cover and hood. Otherwise
hook a clamp amp meter to the battery cable and watch it as the engine cranks over. It should fluctuate as each piston comes up on
compression. You say it started using antifreeze? It sounds like to me that antifreeze has gotten in on top of one or more pistons and that's
causing your hydraulic lock and not letting it crank over. Drain th engnine oil and see if antifreeze comes out first before oil starts
flowing. BTDT. Let us know what you find.

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I kept checking the motor oil for any signs of antifreeze. With the injector pump not completely shutting off 2 of the injectors when in stop mode, I suspect it may have gotten hydrostatic lock in 2 cylinders from diesel fuel. The engine turns evenly, not slow-fast-slow-fast like a valve or 2 were open. It turns the same speed it did before this problem. If the cam shaft was broken, wouldn't 1 or more valves be open causing no compression in 1 or more cylinders.

my theory is if one cylinder has both valves closed it would compress on the up stroke and then decompress on the down stoke--all without letting any compression out the exhaust and no intake vacuum. On a cylinder that has one valve open the piston pushes air out and then sucks it back in