440 Leaking Question

[stinger]

Hope it's something simple  Good Luck!

[TelisSE440]

Thanks, i'll take a look at it in the weekend and hopefully end this headache...

[cudabob496]

Will do the compression test in the weekend. I didn't get any white smoke out of the exhaust. One and a half years no coolant leak until no, before placing the new gasket i had dripping all over the place from the same spot. I'll find a pressure tester, i just want to avoid the tear down. Even if putting a bead of copper seal in the cylinder head - block line to achieve it.

I'd try an aluminum based stop leak product first

[1970 RT Challenger 1970]

I'd try an aluminum based stop leak product first

On a Car I used to have, I tried Rislone Liquid Copper Block Seal Stop Leak. It was a Ford 4.6L aluminum engine and leaking from the block and the plastic intake manifold/ water neck that Ford should have recalled as it was a bad design. The Rislone product worked real good for about 8 months then the manifold needed to be replaced on a cold January 1 when it blew it's top spewing steam at the grocery store!

[cudabob496]

On a Car I used to have, I tried Rislone Liquid Copper Block Seal Stop Leak. It was a Ford 4.6L aluminum engine and leaking from the block and the plastic intake manifold/ water neck that Ford should have recalled as it was a bad design. The Rislone product worked real good for about 8 months then the manifold needed to be replaced on a cold January 1 when it blew it's top spewing steam at the grocery store!

yep, won't know till we try.  hate to tear down an engine when $6 might solve problem.
I had header bolt leaks 15 years ago, and alumaseal has cured them for last 15 years.

[TelisSE440]

I made sure that the coolant leak was between the bock and head, so I took off the cylinder head eventually (for the second time) to see what the problem was. The following photos seem confusing to me. What is more confusing and surprising is that both intake sides had coolant on them when disassembled (some rust in chamber No 5). Can't figure out what the problem is, coolant crystal clean, engine oil also...

[TelisSE440]

A little more...

[xtopfuel]

Did you say heads were fresh? I believe I would send them out and fav them checked not looking to good on that gasket for being fairly new

[TelisSE440]

I had the heads cleaned and found nothing wrong anyway i did shave them 0.0039 inch. I have a theory, the heads needed retorque sometime in their life, so as time went by the lower head bolts became weaker and didn't push a lot. The engine ''sucked'' air and fuel along with a little coolant fired it out and by blow by, the gases reentered the intake via PCV valve. I believe that the coolant was minimum because i couldn't understand if the coolant went out of the exhaust.

[xtopfuel]

not a very good theory since the heads are off again have them checked

[TelisSE440]

not a very good theory since the heads are off again have them checked

I didn't express the time right, the cleaning was done two days ago along with the resurfacing.

[burdar]

They checked the heads for cracks right?

What does the gasket surface of the block look like?  If there is a block problem, that can cause your issue to.  How are you cleaning the block before you install the new gasket?  I usually just use a new razor blade to clean the old gasket material off of the surface.  Then use something like brake clean to degrease the surface.  Never use a roloc disc or sand paper to clean the surface.

[cudabob496]

use paper gasket along with metal gasket.
looks like you are sucking oil into intake runners.

one .060 gasket, or two .30 gaskets, with RTV around openings

[TelisSE440]

They checked the heads for cracks right?

What does the gasket surface of the block look like?  If there is a block problem, that can cause your issue to.  How are you cleaning the block before you install the new gasket?  I usually just use a new razor blade to clean the old gasket material off of the surface.  Then use something like brake clean to degrease the surface.  Never use a roloc disc or sand paper to clean the surface.

The block surface has some little pieces of the gasket. I cleaned them with a razor and a paint reducer. Don't know how the surface is, i will take a steel ruler to check straightness.

[TelisSE440]

use paper gasket along with metal gasket.
looks like you are sucking oil into intake runners.

one .060 gasket, or two .30 gaskets, with RTV around openings

Will do, but what about the coolant around the intake openings Bob? Could think a possible cause for the coolant to be there?