James_Douglas Posted February 24, 2007 Report Posted February 24, 2007 Hey Guys, Remember that engine sound that I could not nail down ? Well, it appears to be related to the cooling system! You read that correct, the cooling system. When the engine is started cold AND the heater control valve is pulled out I get a sound that is very similar a valve or a slight rod knock. It is some kind of water hammer. It may be due to my unique water neck. If I push the heater control valve back in it goes away. If I let it heat up and cycle the valve a couple of time it fades away. I may have some air in the system or ? I am going to see if I can find a small inline one way valve for the heater return, to make sure no water is trying to back up that system. The reason it just started a few weeks back is that is when the cold snap started here and I pulled the heater control when cold. Very odd. James Quote
Plymouthy Adams Posted February 24, 2007 Report Posted February 24, 2007 you must be running hard water in that system..use some water softner...lol that is a unique situation you have there... Quote
1just4don Posted February 24, 2007 Report Posted February 24, 2007 Here and now,,,hard water is defined as solid ICE. soft water is anything liquid and meant for drinking. Quote
Don Coatney Posted February 24, 2007 Report Posted February 24, 2007 Living in Tennessee I thought the clear liquid meant for drinking came from a still:confused: And this distilled stuff will keep your radiator from freezing in a cold snap. Quote
TodFitch Posted February 24, 2007 Report Posted February 24, 2007 Sounds like you have some air in the heater circuit that is not being purged. Is there a high point in the plumbing that you can install a purge valve? Quote
De Soto Frank Posted February 26, 2007 Report Posted February 26, 2007 Interesting... My '48 NYer has the same dual-heater system as James' Burb... Never recall any funky noises related to water-hammer from the cooling system... but I have had other vehicles where I would hear gurgling and "whooshing" in the heater area, especially when the t-stat would open-up... IFRC, the through- piping on the MoPar dual comfort-master is higher-up on the firewall than it is with the "Deluxe" or Model 36 heaters... I had one of those Prestone flushing tees on the NYer(I put it in one the "high lines"), which made for a convenient place to bleed-off any air... Plumbing systems can be funny things, whether it's hot-water, single-pipe steam, brakes, etc... My '72 Chevy pick-up(250 six) had a cooling system that was quite prone to air-entrapment in the heater... finally had to resort to drilling a 1/16" bleed hole in the flange of the 'stat to allow it to "self-bleed" during warm-up... Good luck with it James... FRank McMullen Quote
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.