need4speed Posted December 19, 2012 Share Posted December 19, 2012 Can anyone tell me if there are differences between the tdi heater, and the one fitted to the td5? I know that the electrical plug is different where it attaches to harness but i was wondering if there are any other differences? Reason im asking is that ive noticed that the hole in the td5 bulkhead where heater attaches, is a lot smaller than the opening in the heater body itself? Quote Link to comment Share on other sites More sharing options...
=jon= Posted December 19, 2012 Share Posted December 19, 2012 The hole on my bulkhead is a lot smaller than the heater opening too.. (non TD5 bulkhead) Quote Link to comment Share on other sites More sharing options...
Maverik Posted December 19, 2012 Share Posted December 19, 2012 Hey up Phil, Its one of those wierd things, I've read bits on here about people opening the aperture up... I forgot to do it! - I think it harks back to when the bulkheads could be adapted for RHD/LHD with just poping some cover plate type panels off etc. Some of the early matrix's the inlet outlet pipes point down, the newer ones just come out horizontally. I use a TD5 matrix I belive the blower plug was the old style just the plug to the resistor to the main harness was new style. i used an old resistor from another heaterbox i had, which had the lucas 3 way connector. and just re-pop rivetted it it the old resistor hole. Other than that I don't think there are many more differneces. Mav Quote Link to comment Share on other sites More sharing options...
=jon= Posted December 19, 2012 Share Posted December 19, 2012 Does opening the hole up make a noticeable difference to the airflow? I had the heater box off over the weekend, I didn't even consider doing it! Quote Link to comment Share on other sites More sharing options...
need4speed Posted December 19, 2012 Author Share Posted December 19, 2012 Hmm never considered opening up the hole in the bulkhead. Interesting idea. Im sure that would let quite a bit more airflow through. Surprised i havent heard of that one before considering how many people moan about how carp the heater output is... Quote Link to comment Share on other sites More sharing options...
reb78 Posted December 19, 2012 Share Posted December 19, 2012 I didnt think there were any differences apart from the matrix pipe shape. I have a TD5 heater matrix and box in my 1989 110 and it was a straight swap. Quote Link to comment Share on other sites More sharing options...
need4speed Posted December 19, 2012 Author Share Posted December 19, 2012 Has anyone opened up the hole in bulkhead to match heater outlet? If so, was it worth the effort? Quote Link to comment Share on other sites More sharing options...
Lars L Posted December 19, 2012 Share Posted December 19, 2012 Well, the difference isn't that big. I did it when I had the heater out of my previous 110. And I won't take it out of my present Defender just to make the hole larger... Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted December 19, 2012 Share Posted December 19, 2012 Is the corresponding hole in the back of the dash duct also larger? As if not then there's little point enlarging the bulkhead one... Quote Link to comment Share on other sites More sharing options...
need4speed Posted December 19, 2012 Author Share Posted December 19, 2012 Thats a good point james. i will take a look at the back of the dash tomorrow. Quote Link to comment Share on other sites More sharing options...
Lars L Posted December 20, 2012 Share Posted December 20, 2012 There's not a "corresponding hole", the hole in the bulkhead leads directly into the lower part of the dash. Which means that this has to be warmed up before there will be any heat inside... Quote Link to comment Share on other sites More sharing options...
Adam001 Posted December 20, 2012 Share Posted December 20, 2012 There's not a "corresponding hole", the hole in the bulkhead leads directly into the lower part of the dash. Which means that this has to be warmed up before there will be any heat inside... Yes there is a corresponding hole in the dash section. I just re-assembled everything on mine, looked at the 2 holes and saw little point enlarging the hole. But then my bulkhead is galv so didn't want to! Quote Link to comment Share on other sites More sharing options...
Lars L Posted December 20, 2012 Share Posted December 20, 2012 If there is, I didn't notice. I cut both in one go. Not much use to cut one and not the other... Quote Link to comment Share on other sites More sharing options...
Les Brock Posted December 20, 2012 Share Posted December 20, 2012 Yes there is a corresponding hole in the dash section. I just re-assembled everything on mine, looked at the 2 holes and saw little point enlarging the hole. But then my bulkhead is galv so didn't want to! Thats what I did Quote Link to comment Share on other sites More sharing options...
Ex Member Posted December 20, 2012 Share Posted December 20, 2012 Opening up the bulkhead hole is simple and I thought quite common..... I'm not sure on later vehicle, but earlier ones need larger vents in the dash as well as that is the main restriction to airflow. Quote Link to comment Share on other sites More sharing options...
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