I had a mystery leak on a BBC in my stock car and got black flagged at a couple of races for putting water down on the track. It took a while but of course it was behind the flywheel. Pulled it apart and I could see a trail of water running down the back of the block. Outwardly, the plug looked fine and it was the OG steel one. I replaced it with a brass one.
Even tho I’m a fix it right and can’t imagine why something this new has a leak to begin with, a weeper with the GM tablets might be a good idea. It was made for head bolts that go into the water jackets and is/was the standard dealership repair. I’m concerned with a K-Seal/Aluma-Seal like products on what happens to to the rest of it. If it can’t settle out of solution that’s good but it’s an unknown to me. I put Permatex #2 on all new expansion discs and never had a leak. When rebuilding a few engines I’ve found old ones in the water jackets..always pi..ed me off.
Put on lift pulled starter went up back of engine with lighted camera looked at all freeze out plugs all brand new steel ones done at engine redone all dry and clean-- all new ones on sides and new rear main seal-- took it for a good 35 mile run put in garage let cool down NO leaks on on white paper put on garage floor-- PRESSURIZED system to 12 PSI let set for 3 days did not drop in pressure or drip any anti freeze on paper all dry---- took it for another test drive 25 miles parked it again checked it again paper is dry---- so maybe it needed a good test drive to get everything up to temp to settle in everything working perfect as it should TEMP gauge-- Electric fan on at 200 degrees brings it down to 170 degrees with AC on-- All is well and ready to use-- Thanks for all your help--
Don't laugh......I've seen it work..........and it's cheap too!(Of course.....replace the leaking plug is the final fix but....if the pecker works wait until cold weather to replace plug!) 6sally6
Unless you have an special block, small block fords dont have freeze plugs under the bell housing like chevys do. Only place to leak on the back are the ones in the back of the heads or as another suggested the intake is weeping. Also could be coming from below the heads and running along the pan or top of block then collecting on the lowest point such as the bell housing. But seems like you may have figured it out.
Is that a chrome plated intake or polished ? Chrome is not a friend when dealing with leaks of any type . Intake bolts on SBF will leak also . But seems as you have cured the issue . Good luck and be safe , the fun factor is near the top at the moment .
The Jalopy Journal
