Case 630 diesel problem

Milk · Aug 21, 2022

Hi guys,
I have a case 630 diesel tractor that was getting water in the crankcase. The problem just started and it s so bad that water was coming out of the oil breather cap. I pulled off the head, didn t see anything that would be obviously broken or cracked as of yet! I have to have the head checked out by a mechanic. One thing I noticed was that there s two head gaskets! Any thoughts on why someone would have put two gaskets on? Also, any thoughts on what could be the problem with the water getting in the crankcase? Thanks in advance for your ideas.

Willow Lane · Aug 21, 2022

Those are a wet sleeve engine, so you could have a failed o-ring at the bottom of one of the sleeves or a cracked sleeve. On the double head gasket, they may have planed
the head or the top of the block because it wasn't flat and had to add the second gasket to get enough valve to piston clearance

Milk · Aug 21, 2022

Okay, thats what I was thinking on the double gasket. I suppose the safe thing is to double up the gaskets again! What is the best way to check for cracked sleeves? Thanks for the reply!

casecollectorsc · Aug 21, 2022

Have to take the sleeves out and have them magna fluxed by a good machine shop. They should also be able to measure your head and check for valve to piston clearance. Are you sure the block isn't cracked...seems like a lot of water in the pan if only a sleeve. Never heard of using two head gaskets on any Case engines.

Milk · Aug 21, 2022

Never have seen this before either! I just pulled the head off yesterday late so I havent had a chance to check it out thoroughly. I am thinking that maybe a cracked sleeve is the case! I wouldnt think that there would be that much water in the oil! I am talking about a gallon and a half was mixed in the oil when I drained it! Thanks for the reply!

Dieseltech · Aug 21, 2022

Stacking two gaskets is asking for trouble, direct injection diesels usually have a flat surface, adding a second gasket would LOWER the compression too much for the
engine to start and run right, and would make compression and water leaks more likely to happen.

Milk · Aug 21, 2022

Probably the first thing to do is have machine shop check out the head to see if clearance is the issue! I am thinking that it is, thus the two head gaskets!if clearance is the problem, what should be the fix for this tractor? Its just a scraper attached tractor, not used for anything else. Thanks for response!

Dieseltech · Aug 21, 2022

I'd drop the oil pan, and fill the block with water and see if there's any LOWER sleeve area leaks for a few days. If no water leaks away I'd have the head checked and if OK, replace it with ONE gasket as it should have.

caterpillar guy · Aug 21, 2022

Probably if it has been run with that much water in it have the bearings a look see and push some oil through the oil pump or just flat change it for a new one. Cam bearings too.

Fritz Maurer · Aug 21, 2022

You need to get a service manual and see what the
maximum piston protrusion is.... or talk to
knowledgeable Case guys about it. If its too high,
two head gaskets will certainly work, although this
is less than ideal.... a better way would be to
remove a specific amount off the top of the piston ,
after the protrusion has been carefully measured.
The puzzling thing to me is if the block was in fact
decked, that would mean re-cutting the
counterbores... certainly any party capable of this
work would know that will raise the pistons
accordingly... to just stop right there and slap on
another gasket?

560Dennis · Aug 21, 2022

What did the head gaskets was in there look like ? Thats the road map to repair . Never seen two head gaskets use before . That tells me
more that further investigation an repairs are nesssary .

Take the head to a machine shop have it pressure tested ,clean up cut for sure. Make sure the the sleeves are protrude the proper height.

Follow the head gasket mgr. recommend retorque procedure.

jon f mn · Aug 21, 2022

I don't see valve clearance as creating a
need for 2 gaskets. My guess is the head or
block is out of spec and they thought 2
gaskets would cure it. I would start with
sending the head in and checking the
sleeves for cracking and o-ring failure.
Also check the block for cracks, especially
around the sleeve deck.

Milk · Aug 21, 2022

Ok, I will do. How do you check for cracks? Magnaflux??

Milk · Aug 21, 2022

Thanks, I will have it checked out! Head gaskets were beat up pretty bad, mostly because of wedging bar in between head and block!

Milk · Aug 21, 2022

My plan is to do an inframe overhaul!

Milk · Aug 21, 2022

Yep, gonna take it to machine shop and see what they say and follow their recommendations. Thanks for the reply!

jon f mn · Aug 22, 2022

I just visually check, most times it's either obviously good or bad.

Milk · Aug 22, 2022

I poured water in all the cylinders today, removed the pan first, water slowly trickled down the cylinder walls until all had run out! Wondering if maybe the block is cracked!! This is becoming a money pit!!

WilBury · Aug 23, 2022

By filling the block with water, Dieseltech meant the [i:4fe40b8131]cooling system[/i:4fe40b8131], not the cylinders!

Milk · Aug 23, 2022

Okay, thanks! Would there be leakage of water if cylinders
are filled with water ? I am trying to find out if block is
cracked, hard to tell!

WilBury · Aug 23, 2022

Absolutely, if you shone a light in there you could probably see daylight past the pistons.
Wet liners are surrounded by coolant so if they, the block, or bottom liner seals are leaking, you should be able to see something somewhere, especially if you can put a bit of pressure to it.

Case 630 diesel problem

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