Jocko_51_B3B Posted May 25, 2019 Report Share Posted May 25, 2019 (edited) I applied 5 psi air pressure to the coolant system of my 218 and the pressure leaked down to zero after 40 minutes. So OK, I know there's a leak somewhere, but what is considered an acceptable leak down rate? Zero? Is there a rule of thumb about this? Meanwhile I'll keep looking, listening, and spraying soapy water on bolt heads etc. If I still can't find a leak, I'll fill it with water and check for leaks that way. Thanks. Edited May 26, 2019 by Jocko_51_B3B Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted May 25, 2019 Report Share Posted May 25, 2019 Is your radiator vented on the top as pictured below? Quote Link to comment Share on other sites More sharing options...
Jocko_51_B3B Posted May 27, 2019 Author Report Share Posted May 27, 2019 I found the leak. The engine has been re-sleeved and there is a leak coming from near the bottom of the #4 cylinder sleeve. So for now I'll disassemble the engine and take it back to the rebuilder. I should have pressure checked the block immediately after the rebuild. Live and learn. Hopefully the block can be repaired. If not, then the search for a replacement block begins. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.