Morris Minor Owners Club

Does anyone have any tips on changing bypass hose on 1098. Seem to remember hearing that it could be done without taking head off. Is that so?

Yep. If you fit the straight pipe type bypass hose, taking the water pump off is easier than removing the head. If you fit the concertina type bypass hose then you can get it off/on without removing the pump.

if you have a concertina type, remember to use plenly of greese; the way I did it was put one end on, then squish the hose down with a steel rule, get it lined up, release the rul, and hey presto it pops into place!

I do not think that it is a very good idea to use the same grease to lubricate rubber components that you would use on the other parts of the car.

If you need to make rubber more slippery then use a small amount of soap or washing up liquid.

or KY Jelly

The concertina ones do not last as long but I'd use one unless the water pump was leaking too (new water pump around £13...).

Thank you all very much. A concertina one it is then. I thought it could be done. Cheers.

I recently changed the bypass hose on my saloon, the old one was concertina type and as I didn't fancy removing the water pump replaced with similar. It is a bit of a fiddle but washing up liquid works as an excellent rubber lubricant. Try to only get the minimum of liquid inside the hose ends and not outside otherwise you will be swearing.
This hose tends to get neglected tucked away where it is. I try to inspect it, with the others, each time I check underbonnet levels. Any signs of cracking I just change it before getting caught out if it bursts on the move. That's why I changed it, there were signs of external deterioration. It had been in place about three years.

Aye, KY-jelly or AquaGel (and presumably other similar water based lubricants) are excellent when attempting to change the rubber hoses on [any car] and *shouldn't* have any negative long term consequences for your hoses...