By Pass Hose

[Kevin]

At our last branch meet the subject of Bypass Hoses came up, we all know that the straight type are more durable but which came 1st as both an old spares and workshop manual show the bellows type, I hace been informed that the commercials were originally bellows type that later changed to the straight type, has anyone else got any ideas
Thanks

[tuning72]

Hi
At BMC we always fitted a quality straight hose. The bellows ones were supposed to be easier to change. We found a lot of leakages were because the bellows hose was not fully on each stub or had perished. The straight hose was a lot more servicable and provided not too long lasted the life of w/pump. Ivor

[tuning72]

Hi
Just a thought. When racing the "A" series we used to blank off the w/pump and cyl/head
stubs, do away with the by-pass hose AND drill two holes in thermostat. If taking the thermostat out there was a circular blanking
sleeve put in to stop cavitation, makeing sure water would circulate to rear cylinder.
Do not remove thermostat without fitting sleeve!
(talked about elswhere) .....Ivor