Volvo STORIES Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 12/2004

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

About those so-called 'Freeze Plugs'....

uid 18083's pic
posted by  lucid on  Wed Dec 23 12:00 CST 2009
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

"Their purpose is to be sacrificial in case the coolant freezes -- the pressure of expanding ice will hopefully just push out the caps, instead of literally cracking and bursting the block."

Fortunately for many, over the years those plugs have popped due to freezing, as you describe. However their real purpose is to plug the holes left when the sand core is removed after the block has been cast (as in cast iron). In the trade they are called "core plugs".

The freeze protection is purely serendipitous, and should not be relied on in lieu of anti-freeze.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New 1989 740gle oil light flickering in 7 degree weather
posted by  jacquewong  on Fri Dec 18 14:33 CST 2009 >


<< < > >>



©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.