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Somthing happened when I changed my waterpump this week. Took it out for a test drive and unknown to me the gearbox oil cooler pipe had moved and the altenator rubbed a hole in it, at least 4t of oil was lost. Went to bed and the next morning the E10 fuel had rotted through the rubber hose main supply to the fuel sump supplied by barrarts (made in China no doubt) so bad
week
Somthing happened when I changed my waterpump this week. Took it out for a test drive and unknown to me the gearbox oil cooler pipe had moved and the altenator rubbed a hole in it,
Yikes.
Having recently replaced my water pump I'm now prompted to check my cooler pipes!
A water pump job on a V12 is pretty darn invasive. Lots of opportunity for things to get knocked around a bit.
at least 4t of oil was lost.
If you didn't drive very long or hard your transmission likely escaped any injury
Went to bed and the next morning the E10 fuel had rotted through the rubber hose main supply to the fuel sump supplied by barrarts (made in China no doubt) so bad
week
How old was the hose?
I can't remember the last time I saw a rotted-out fuel hose that wasn't elderly.
But....with the very iffy quality of parts these days I reckon anything is possible.
BTW, I've found that marine grade hose is an excellent choice on old Jags. I can looks up the specs if you want. Or just search the archives
I am in various MG clubs. The advice over fuel containing ethanol which, as you say, can rot old fuel lines and seals, seems to be to use Super 99 octane fuels which are officially rated E5 but actually contain little or no ethanol. I think super unleaded Esso and Shell fall into this category but check their websites.
Rex
What a day! This is the stuff you need for the main tank to sump tank and sump tank to fuel pump: https://www.ebay.com/itm/163266054529
This is for 2 feet, you might need 4.
As far as I have found, only in the USA can you get 1/2 inch hose of top quality. I eventually got some when I redid my car in this area, including the fuel pump to an easier location, and it is terrific. Even my Wife cannot smell fuel any more - and it was pretty good before.
Last edited by Greg in France; 08-15-2021 at 12:40 AM.
the car was about 1/2 mile from home when it started lurching and at that point i didnt know about the fuel leak but i did think i had more gas than what it was showing, i changed cooler hose for 7.6mm R9 fuel hose, fingers crossed, added 2lt of dexron2 and took it round the block checked the dipstick and it was just showing at the bottom of the stick so i have ordered 2 more lt..the first indication i had was the brakes starte pulling a we bit to the left so i guess the rear right hand caliper got a covering.
Without wanting to sound alarmist I wouldn't be entirely comfortable with using fuel hose as transmission cooler hose....except as a temporary fix. The oil can break down the rubber and send little bits through your transmission.
You should seek out hydraulic hose of some sort. Or, easier still, simply buy hose specifically intended for the purpose.
The SAE J9 hose in your photo is rated to 50 psI working pressure. Transmission cooler hose is rated at 400psi. Normal pump pressure in a typical automatic is around 200-250 psi, but you will see lower pressures in the cooler lines.
I'd feel more comfortable using cooler hose vs. fuel hose simply for the pressure rating. The industrial hose supplier I use says their fuel and transmission hoses are made from the same type of rubber, but that doesn't mean all manufacturers do the same. You should be ok from a material compatibility point of view.
08-14-2021, 01:51 PM
Somthing happened
