jimmysisson
Veteran Member
- Joined
- Jul 11, 2005
- Messages
- 2,358
- Location
- W.Mass
- Tractor
- 1993 NH 2120 (the best), 1974 MF 135 (sold, but solid), 1947 Farmall A (bought, sold, bought back, sold again), 1956 MH50 lbt (sold, in 1980, darn it)
Ireally can't tell for sure that it's sucking coolant back into the system. If I had to guess I'd say no. It's never full and the radiator is still positively pressurized even after days of non use.
Unless the cap is designed to let coolant back in as the rad cools, I can't see why it should suck coolant back in. When the pressure goes down the cap spring closes the cap seal against the rad neck - and the overflow is above the seal, so no sucking back.
Let us know what you find.
Jim