heat hose engine bay connection hoses

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RobboMC
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Joined: Wed May 09, 2012 1:36 am
MGF Register Region: Eastern Australia
Model of Car: 1999 Mpi

heat hose engine bay connection hoses

Post by RobboMC » Mon Feb 13, 2023 4:19 am

Has anyone replaced the rubber heater hose connections at the engine bay end?

I have done all my radiator and coolant hoses except for a couple of these around the engine bay, the small
right angle hoses look impossible for a DIY to get at, nestled above the rear sub-frame.

Should I attack them from above, or is it a hoist job?

Or do I need to drop the rear sub frame ( which I have done before to replace the engine ! )

mowog73
Posts: 513
Joined: Sat Mar 26, 2011 12:48 pm
MGF Register Region: Canada

Re: heat hose engine bay connection hoses

Post by mowog73 » Mon Feb 13, 2023 12:46 pm

I've just finished replacing all 5 hoses that are associated with the heater on my wife's MGF and will soon be doing the same job on my MGF.

The two hoses at the engine bay end can only be replaced by removing the heater pipe first, which requires removing most of the interior in order to get to the pipes.
Mark

mgb281
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Joined: Sat Feb 05, 2022 8:37 am
MGF Register Region: Somerset & Dorset

Re: heat hose engine bay connection hoses

Post by mgb281 » Mon Feb 13, 2023 8:29 pm

I replaced them a few weeks ago while the engine was out, even then it was a bit of a struggle. The hoses go about two inches through the bulkhead so they have to be fitted with the sprung steel hose clamps due to the confined space.

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RobboMC
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Joined: Wed May 09, 2012 1:36 am
MGF Register Region: Eastern Australia
Model of Car: 1999 Mpi

Re: heat hose engine bay connection hoses

Post by RobboMC » Tue Feb 14, 2023 1:06 am

Oh joy!

Thanks for the advice.

Maybe a job for Xmas holidays

mowog73
Posts: 513
Joined: Sat Mar 26, 2011 12:48 pm
MGF Register Region: Canada

Re: heat hose engine bay connection hoses

Post by mowog73 » Tue Feb 14, 2023 12:20 pm

The two hoses that pass through the fire wall are not shown in the workshop manual, only on Rimmer's website. And they are sort of shown incorrectly in terms of the hoses that they connect to from the engine, so take note of which connects to which engine hose in terms of inlet and outlet. The heater pipe really isn't show correctly in the workshop manual. Also, the hoses to/from the heater valve are show incorrectly in the workshop manual. I've made up a coolant hose drawing that shows the hoses correctly.

I reused the factory constant hose clamps, which are superior to jubilee clamps, and replaced jubilee clamps, that a PO had installed, with constant tension hose clamps.

Here's a couple pictures to inspire you!
SAM_4468.JPG
SAM_4455.JPG
Coolant system with hose size and part numbers - corrected.jpg
Mark

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