740 & 760 Expansion tank cap pressure rating
Tiny (@Brehon47)
Western Sydney
Would someone be able to confirm the pressure rating for the Expansion tank cap on my 1989 740 sedan NA B230F engine ? I have been advised it should be 150kpa but the present cap is black and 75kpa. I contacted Trivett's Parramatta & they could not confirm what it was - and had none in stock. Thanks, Tiny
Comments
The factory cap pressure is 150kpa
You should use a black 75kpa cap as used on all 240 models
Less stress on the old cooling systems?
What's that? A question or statement?
A question?
Yes
I have significant empathy for my ageing Volvos however it is the physics that engage me not metaphysics! Tiny
I have had several 740s both turbo and NA and have always run 150KPA caps on them .
You're either lucky or you live in a cold part of town to not suffer from a meltdown
when your cooling system reaches 30 years of age and you're stuck in traffic on a 45° day and a heater hose or something else blows, I can assure you you'll wish you bought a 75kpa cap
I'm going with Crackers - let the chips fall where they may!! The Colonel consents also. Tiny