blown head gasket?
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blown head gasket?
Hello, I have this motor that I purchase. 86 302 HO. It came out of a 86 MUstnag GT. The owner said that it had a blown headgasket.
I purchased some 87 heads to put on along with hookers comp headers.
When I removed the cylinder heads, cylinder 2,3 and 4 had water in them. Cylinder number 4 had the most water.
I pulled off the cylinder head from the right side of the motor as you face it. Cylinders 5-8 had no water in them.
I couldn't find the a bad spot in the headgasket.
Could the water have gotten in when I loosen the cylinder heads bolts or could I be looking at a more serious problem.
The radiator and the water jacktes are sludge with water/oil mix.
The oil looks fine.
Also when removing the intake manifold, the intake gasket look like it had failed. Could this have been the source of the oil getting into the cooling system?
Thanks
I purchased some 87 heads to put on along with hookers comp headers.
When I removed the cylinder heads, cylinder 2,3 and 4 had water in them. Cylinder number 4 had the most water.
I pulled off the cylinder head from the right side of the motor as you face it. Cylinders 5-8 had no water in them.
I couldn't find the a bad spot in the headgasket.
Could the water have gotten in when I loosen the cylinder heads bolts or could I be looking at a more serious problem.
The radiator and the water jacktes are sludge with water/oil mix.
The oil looks fine.
Also when removing the intake manifold, the intake gasket look like it had failed. Could this have been the source of the oil getting into the cooling system?
Thanks
Postmaster
Joined: Jun 2005
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I alway get water in the back holes when ever I remove heads, I even drain the motor as much as posable and I still get it...
If you know the new heads are good run them if you have no idea about them let a machine shop check and freashen them up before you put them on.
If you know the new heads are good run them if you have no idea about them let a machine shop check and freashen them up before you put them on.
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From: fargo, nd
usually just look on the block face where the head gasket was... scrape away whatever head gasket material is left there if any... and look for any discoloring on the metal... same with the heads... and hemi is right about getting the heads checked over... probably the reason you only got water on one side of the engine is that only one head gasket went... or yes it could have just blown the intake gasket and caused it to suck antifreeze into that side... but usually its only 1 or 2 cylinders that get filled either way unless it got seriously overheated and warped the head... then all 4 could have filled
Last edited by darrin1999; Dec 7, 2006 at 08:20 AM.
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Will pressure test
I didn't see any rust on the head or block. The number two cylinder head chamber intake valve didn't have any carbon build up, all metal. The spark plugs from the right bank looked normal.
Will put it back together and pressure test.
Will put it back together and pressure test.
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From: Tucson, AZ
Originally Posted by wifes65
The radiator and the water jacktes are sludge with water/oil mix.
The oil looks fine.
Also when removing the intake manifold, the intake gasket look like it had failed. Could this have been the source of the oil getting into the cooling system?
Thanks
The oil looks fine.
Also when removing the intake manifold, the intake gasket look like it had failed. Could this have been the source of the oil getting into the cooling system?
Thanks
i've seen water/oil mix, a long time ago, and it didn't look fine to me.
if the intake gasket failed/did not seal at the water passages from heads to intake, then that is a possible source of water/oil mix.
if i had a 20 yr old block with water/oil mix, i would get it torn apart and taken to a machine shop for cleaning and magnafluxing before spending any more money on the project. best of luck, cheers, garsten
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Yes radiator from mustang
Yes the radiator from the mustang has the goo.
Will try this first and then if that doesn't solve the problem will look into a better diagnosis from a machine shop.
Will try this first and then if that doesn't solve the problem will look into a better diagnosis from a machine shop.
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The problem I have with this is the oil only getting in the water no water in the oil???
The oil in the block is under no pressure but the cooling system is. So for the oil to get into the cooling system it has to overcome the pressure in the cooling system. I have seen cracked heads as well as bad head gaskets put water in the oil, but not the other way.
I'm thinking there is no oil gallies in the heads, the valve train gets oil from the lifters/pushrods and then drains back to the oil pan through the drain holes in the heads/block. So how is a bad head gasket letting oil get into the cooling system. the only thing under pressure in the heads is coolant.
Could it be a cracked block maybe????
And the water you found in the cylinders when you took the heads off is normal when you remove the heads...happens all the time.
The oil in the block is under no pressure but the cooling system is. So for the oil to get into the cooling system it has to overcome the pressure in the cooling system. I have seen cracked heads as well as bad head gaskets put water in the oil, but not the other way.
I'm thinking there is no oil gallies in the heads, the valve train gets oil from the lifters/pushrods and then drains back to the oil pan through the drain holes in the heads/block. So how is a bad head gasket letting oil get into the cooling system. the only thing under pressure in the heads is coolant.
Could it be a cracked block maybe????
And the water you found in the cylinders when you took the heads off is normal when you remove the heads...happens all the time.
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From: charlotte nc
I think maybe the owner dogged the engine so hard he doesnt even know whats wrong with it. You can not be sure of his diagnosis , and you dont know how hard he pushed the engine, Did the engine ever overheat?
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Curious also.
Well by Saturday the cooling will be pressure tested an dthe engine ran. So I will let you know what I find out.
I was just as curious about the oil in the cooling system, unless it was tranny fluid and not oil?
So far no other problems can be found except for the bad intake gasket.
I did not check the crank and bearings, but the oil pan was clean, so was the lifter valley, valve covers, lifters show no damaged on the bottom or sides. cam looks good.
I did hear engine run for 20 seconds or so, no knocks, it started right up.
The end of the intake, the false ports where clogged with some sludge and carbon mud. That was about it.
I was just as curious about the oil in the cooling system, unless it was tranny fluid and not oil?
So far no other problems can be found except for the bad intake gasket.
I did not check the crank and bearings, but the oil pan was clean, so was the lifter valley, valve covers, lifters show no damaged on the bottom or sides. cam looks good.
I did hear engine run for 20 seconds or so, no knocks, it started right up.
The end of the intake, the false ports where clogged with some sludge and carbon mud. That was about it.
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Yes and no
Yes it would but I would also know the upper gaskets are good. And I got a good look at the top end of the motor.
I was told the blown head gasket diagnosis was based on white fluffy smoke coming out of the right tail pipe.
Motor is back together going to flush system and pressure test. Will let you know the results.
I was told the blown head gasket diagnosis was based on white fluffy smoke coming out of the right tail pipe.
Motor is back together going to flush system and pressure test. Will let you know the results.
Last edited by wifes65; Dec 8, 2006 at 12:22 PM. Reason: spelling error