Posted By: dvw
See how to find a small oil leak - 04/17/24 08:39 PM
Plug off your breathers and dipstick. Mine has a vacuum pump so no breathers to worry about. The dipstick is O ringed so it seals. Grab yourself a handy dandy Harbor Frieght regulator. This one was $7. Attach the hose to the valve cover at about 5 psi. Spray away with the soapy water. When the trans was pulled for service there was a little oil at the bottom. Just a few drops at the bottom of the bell housing. Once the trans was out everything looked dry. As always this method finds any leak.
Doug
Posted By: rickraw
Re: See how to find a small oil leak - 04/17/24 09:12 PM
Sweet. I always put some ultra gray around the plug just for extra measure.
Posted By: Neil
Re: See how to find a small oil leak - 04/17/24 09:13 PM
Very clever idea.
It's a good idea to use a sealer around cam plugs I think. Most people don't do it that I've noticed, but the sealing contact surface on those is so narrow it makes me think twice about them. The last engine I built I took my finger and smeared some sealant around it after the plug was installed anyways just in case.
Posted By: Gabby63
Re: See how to find a small oil leak - 04/17/24 10:05 PM
Thanks Doug , we all love cheap & easy . Gary
Posted By: Bad340fish
Re: See how to find a small oil leak - 04/18/24 10:26 AM
Cool tip, ever since I had one of those plugs fall out I smear them heavily with RTV, then I remember it can't be seen and I smear a little more.
When I lost one of those from my 360 it only leaked under heavy acceleration. Just driving or idling it didn't leak. Hammer down and you got a bellhousing full of oil.
Posted By: DoubleD
Re: See how to find a small oil leak - 04/18/24 11:32 AM
I learned from day one - Indian Head Gasket Shellac on freeze plugs - Then I back that up with a bead of grey Permatex
Posted By: HardcoreB
Re: See how to find a small oil leak - 04/18/24 01:42 PM
Conversely, you'll find a crankcase leak with sight, sound, and possibly smell and feel (ouch) if you don't trouble using a regulator?
Posted By: HardcoreB
Re: See how to find a small oil leak - 04/18/24 01:43 PM
I learned from day one - Indian Head Gasket Shellac on freeze plugs - Then I back that up with a bead of grey Permatex
Green wicking Loctite too!
Posted By: moparacer
Re: See how to find a small oil leak - 04/18/24 06:12 PM
I use Ultra grey on that. Some on it when it goes in, and a coating around outside to be sure.
A leak there would be about as fun as a rear main seal leak.
Posted By: 340Cuda
Re: See how to find a small oil leak - 04/18/24 06:19 PM
I have one of these cheap smoke machines from Amazon.
I have found it invaluable in sealing up a race engine to pull a good vacuum with a pump.
https://www.amazon.com/AutoLine-Pro-Automotive-Diagnostic-SMK-1/dp/B06XHRBKTM?th=1
Posted By: dvw
Re: See how to find a small oil leak - 04/19/24 11:36 AM
It was installed with Ultra-Grey. I was just to stingy. It has enough now.
Doug