Heater Matrix Cleaning

My heater is not very efficient and after having to jet wash the radiator and Allard intercooler following a dunking in the quarry I am suspect that the heater is probably filled with silt as well.

Any guides on how to get at it and clean it all up?

What engine?

If 200/300 Tdi you can crimp hoses to/from to avoid coolant loss, remove pipes and flush through in situ.

if that doesn't work, think I saw a Busters guide on removal

http://www.landyzone.co.uk/lz/f41/heater-box-removal-75685.html


Can also need cleaning out under the wing plastic cover, and quite often they just don't seal very well to the bulkhead

I'm about to re-assemble mine on a '87 110. Rammed full of silt and water in the fan housing stopping the fan from working.

It's pretty easy to unbolt. I just undid the hoses and poked them up against the bulkhead so the coolant didn't come out. Screenwash bottle had to come off and a little angle on the bulkhead just above the heater box, but i managed to wriggle it out without undoing the intake duct.

Mine had 6 screws where i think there was originally rivets so the military had been in there before. I can send you a few pics tonight but i undid these screws and just bent the metal flap open to reveal and remove the matrix.

I've given it a pressure wash, a flush with water and a fresh coat of paint before re-fitting. Prove to be a much easier job than I thought.


Also i noticed my drain hole in the intake duct was blocked, just inside the duct from the heater end, so it was letting the water floor into the fan.

its a 200TDI that I put into an ex MOD 90. I think the heat exchanger part must be full of silt as it does not get very hot!

Mine is ex-mod and i think the heater didn't change untill after the tdi's. I've attached a pic of my matrix, i reckon some was military sand, some was yarwell quarry mud.

Thanks Guys. I will drag in and pull it apart this week!