radiator cap pressure

[dirtyfingernails]

On a search of the forum, I noticed that the duece radiator cap (for the multi) should be rated at 7-8 psi. I have two caps I received from memphis for the deuce, one is stamped with 8 the other 15. I've been using the 8psi one but occassionally get some dribble out of the overflow tube. Which cap should I be using. I searched through the TMs but couldn't find a specification.

 

[Westech]

dribble is ok. if it is poring out then you have a problem, but a dribble from time to time (really when shutting off or back from a good run) is 100% A OK.

 

[Jones]

I'd stick with the 7-8# range. A little dribble may just be excess coolant it's pushing out to get down to a level it likes. Once there you shouldn't have any more coolant loss. Just keep an eye on it and remember to include it in your pre-drive checklist.
The 14-15# caps are for the M-800 series 5 tonners with the surge tank.

 

[cranetruck]

If you can't find it in the TMs, try PS Magazine...

http://www.steelsoldiers.com/index....iator_cap&name=gallery&include=view_photo.php

 

[dirtyfingernails]

Dribble is what I got just like you said westec and jones. I'll stick with the 8psi cap. I guess Memphis just made a mistake. Interesting though. When I first got the truck, the rad cap was split. So, I ordered one from Memphis--received the 15# cap. Used it a few times and developed a radiator leak at the top seam. Replaced radiator (from Memphis) and got a new cap with the new radiator (8# cap). Think Memphis would reimburse me for blowing my first radiator? I should have known better and checked to be sure the psi was correct. Oh well--live and learn (and lose $800!).

 

[m-35tom]

using a 15 lb cap will seriously damage the radiator, even blow the top seam completely apart. not a pretty thing.

 

[clinto]

not a pretty thing.

or cheap

 

[readyman]

And don't forget to check the rad cap draintube, mine was plugged solid top to bottom. Gave me some real leakage scares at high speed(revs) at other engine points. Mine was steel(why?) and rusted solid, couldn't be reamed out with the bends it had. Now it's plastic. http://www.steelsoldiers.com/index.php?name=PNphpBB2&file=viewtopic&p=161648&highlight=#161648