Heater matrix hoses

Jimsiss · May 4th, 2023, 19:46

What is the difference between left hand and right hand drive heater matrix hoses? Split one and I want to replace it with silicone ones as they are pretty much the same price as rubber hoses. If they are different then can I modify the LHD ones to fit?

Forrest · May 5th, 2023, 02:05

Assuming you mean the ones under the bonnet, I think you’ll find the RHD part numbers are:

1336133 - upper
3507447 - lower, incorporating the heater valve

and the LHD equivalents

3507412 - upper
3507413 - lower

Maybe Google pictures of them and see what you think.

It looks to me as thought you might persuade the LHD lower hose to fit if your car has aircon and you therefore need to cut it to accommodate the heater valve. You could change the orientation of the ends.

The upper hoses look different and quite complicated so I expect you’d end up restricting the flow by having to bend it.

If you cannot find the right ones pre-made in silicone maybe you could buy straight hose and bend it yourself. Either get super-flex hose, or the stuff with an integral spring wire to stop it kinking. For a more professional job get oridinary 5/8” silicone heater hose and a bending spring and form it yourself into the shape you need. I think you get it to assume its shape permanently by heating it and letting it cool. Never tried it myself though.

Good luck.

May 4th, 2023, 19:46	#1
Jimsiss Senior Member Last Online: Jun 1st, 2024 18:40 Join Date: Jul 2012 Location: Northwich	Heater matrix hoses What is the difference between left hand and right hand drive heater matrix hoses? Split one and I want to replace it with silicone ones as they are pretty much the same price as rubber hoses. If they are different then can I modify the LHD ones to fit? __________________ 940 B230FT

May 5th, 2023, 02:05	#2
Forrest VOC Member Last Online: Today 01:35 Join Date: Feb 2008 Location: Gloucester	Assuming you mean the ones under the bonnet, I think you’ll find the RHD part numbers are: 1336133 - upper 3507447 - lower, incorporating the heater valve and the LHD equivalents 3507412 - upper 3507413 - lower Maybe Google pictures of them and see what you think. It looks to me as thought you might persuade the LHD lower hose to fit if your car has aircon and you therefore need to cut it to accommodate the heater valve. You could change the orientation of the ends. The upper hoses look different and quite complicated so I expect you’d end up restricting the flow by having to bend it. If you cannot find the right ones pre-made in silicone maybe you could buy straight hose and bend it yourself. Either get super-flex hose, or the stuff with an integral spring wire to stop it kinking. For a more professional job get oridinary 5/8” silicone heater hose and a bending spring and form it yourself into the shape you need. I think you get it to assume its shape permanently by heating it and letting it cool. Never tried it myself though. Good luck.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)