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Visible Moisture Between Head and Block?

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78 granada
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Visible Moisture Between Head and Block?

Post #1 by 78 granada » Fri Jun 09, 2017 4:06 pm

Have any of you experienced a small amount of moisture visible between the head and block where they come together on the driver's side of the block? I noticed this the first time I assembled my motor. Not a lot and not running down the block - just visible. I had to pull the head because I managed to pull one of the lifters out and flopped it on its side! So I figured good enough I would just replace the Felpro gasket with another new one anyway. So I reassembled everything with a new gasket. Torque is right on. Head and block are flat. Had the head milled but used washers to compensate so the bolts wouldn't bottom out. But still, I see just a bit of residual moisture when I run it. Plugs look good - not like any amount of coolant is getting into the combustion chamber. Really scratching my head!! Is it possible this is nothing more than condensation? Been offline for a while but good to get back on with you guys.....

Bill

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Re: Visible Moisture Between Head and Block?

Post #2 by CZLN6 » Fri Jun 09, 2017 4:24 pm

Howdy back Bill:

IIWIYS, I wipe the fluid off and watch it for a couple of days. Take a close look at the other side also. It's a little more difficult under the exhaust manifold but worth doing. Watch for color of fluid, amount of fluid, smell and/our odor of fluid. If appearance of fluid stops with repeated heat cycles, good. If not start by loosening and retorqueing the head. That's where I'd start and go from there.

Good luck and keep us posted.

Adios, David
co-author of the Falcon Performance Handbook
http://www.falcon6handbook.com/

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wsa111
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Re: Visible Moisture Between Head and Block?

Post #3 by wsa111 » Fri Jun 09, 2017 9:49 pm

Normal seepage from the drivers side of the engine. It can be fixed with block machine work & o'rings.
I have has better luck with a Victor-Rentz headgasket sold at advance auto parts. Plus the Victor gasket is .004" thinner.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6425CL & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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ags290
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Re: Visible Moisture Between Head and Block?

Post #4 by ags290 » Fri Jun 09, 2017 11:23 pm

Back years ago, we used to have porous block problems with Cadillacs. It was a similar situation to what you are describing. I would recommend a retouque on the head bolts and adding some GM coolant sealing tabs if the leak persists. I have used them more times than I can remember with very good results.

Just my 2 cents

Kevin
Kevin
Early 1965 Mustang with a 170

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wsa111
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Re: Visible Moisture Between Head and Block?

Post #5 by wsa111 » Sat Jun 10, 2017 1:46 pm

ags290 wrote:Back years ago, we used to have porous block problems with Cadillacs. It was a similar situation to what you are describing. I would recommend a retouque on the head bolts and adding some GM coolant sealing tabs if the leak persists. I have used them more times than I can remember with very good results.

Just my 2 cents

Kevin

Kevin, the gold coolant sealing tablets are almost a must after a rebuild. They can be purchased at any GM dealership.
Part #3634621. They come in a six pack. Just add 2 to the coolant tank before starting engine. They will not clog the system up.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6425CL & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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Soldmy66
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Re: Visible Moisture Between Head and Block?

Post #6 by Soldmy66 » Sat Jun 10, 2017 4:48 pm

Rather than use shims, might it be worth investing in ARP studs?

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bubba22349
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Re: Visible Moisture Between Head and Block?

Post #7 by bubba22349 » Sun Jun 11, 2017 8:22 pm

:hmmm: Did you happen to use a bottoming tap to chase / clean the threads during your rebuilding process?
A bad day Drag Racing is still better than a good day at work!

I am hunting for a cheap project car to build up. My Ex-Fleet of Sixes sadly these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

78 granada
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Re: Visible Moisture Between Head and Block?

Post #8 by 78 granada » Mon Jun 12, 2017 10:40 am

I did actually chase the threads and finger threaded the bolts snug to the head without washers to be sure I wasn't bottoming out. I also retorqued the head. The ARP studs would be a good idea thought - I totally ignored my cheap conscience both time I reassembled the top end! Sure appreciate all of your advice, sounds like it's not too uncommon. I will get the coolant sealer and give that a shot. I have to say that the advice I have gotten from this blog has been put to great use and really paid off. This little motor runs beautiful and the sound of it turns heads every time!

Talk to you soon!

Bill

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Re: Visible Moisture Between Head and Block?

Post #9 by rwbrooks50 » Wed Jul 26, 2017 3:05 pm

Same thing is happening to my 73 Comet, 250 I6. I had the radiator roded. Still get hot after a few miles. The engine is original with only 14K miles. It was in a garage for 40 years. The cooling system was flushed and cleaned before I got the car. I put 6K miles over 4 years with no overheating. The pressure pump is hold at 14 lbs. The fluid at the head and block is rusty.

I am thinking of replacing the head gasket just to be cautious. And check the water pump.

Any advice welcome.

Rick

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