Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 9/2017 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

overflow tank cap?? 150kpa or 75kpa on 91' 740T 700

uid 7047's pic
posted by  thelostartof on  Sun Aug 31 04:55 CST 2003
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Sep 1 17:12 CST 2010
[RELATED]

well my stock one has a nice crack al around the top causing a bit of coolant to leak out so ... as of now its glued and taped up ...

went to the junkyard and picked up some 75kpa(11psi) caps. only to notice when i get back to my car that stock mine is a 150kpa(22psi)

so what do i do? wait two weeks till i can afford to buy a new 150kpa cap(only $5 but when you are broke you are broke) or can i use one of the 75kpa caps?? i know that the 150kpa cap helps raise the boiling point of the coolant so how much hurt will this put on my system w/ a 75kpa setup??








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    overflow tank cap?? 150kpa or 75kpa on 91' 740T 700

    posted by  Rtilghman on  Sun Aug 31 05:46 CST 2003
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]


    Any of the caps (grey, black, white, or green) are fine is you were safely running the highest cap (green, 150kpa) prior. All that will change is that the cap will release pressure earlier, but if your cooling system is in good shape and it doesn't heat up very often you have nothing to worry about.

    I have a 75kpa cap with a troubled cooling system and it works fine. In fact, I think I would only use the 75kpa cap if I had to choose... why not just be safe and use a lower pressure cap that will easily release before damage can be done to a hose, radiator, etc.?

    -rt








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    overflow tank cap?? 150kpa or 75kpa on 91' 740T 700

    posted by  t-bone on  Sun Aug 31 05:27 CST 2003
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue Sep 21 04:24 CST 2010
    [RELATED]

    I don't think running a 75kpa for a week or so is going to create any problems. If it's a choice between a leaking 150 (holding no pressure) and a functioning 75 ... it seems clear the 75 is the way to go. All my older Bricks had 75kpa black caps ... so I don't think 11 pounds is too little for safe operation. If the salvage caps are in good shape I'd wouldn't think you'd have any problem using one in until you can afford a new green cap. My $.02







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.