Shackleton Posted November 6, 2006 Share Posted November 6, 2006 My early 3.5 has three wires travelling forward to the oil filter area. One is the oil temp sender, what are the other two. One plugs into this pot shaped cylinder thing - looks like a squarer version of a vacuum unit? The other wire goes god knows where. I've got the temp sender wire hooked up - pretty straight forward but the other two wires are a mystery. Haynes isn't much help. I'd love my pressure guage to work with the 3.9 - what do I need to do? Quote Link to comment Share on other sites More sharing options...
western Posted November 6, 2006 Share Posted November 6, 2006 The one that's screwed into the filter head body is oil pressure sender for the dash warning light. the pot shaped thing could be the pressure transmitter for a pressure gauge, the other sender is probaly for the oil temp gauge. have a look my 200TDi oil pressure & oil temp transmitters do yours look like those ? just click on the picture to make it larger Quote Link to comment Share on other sites More sharing options...
DEANO3528 Posted November 6, 2006 Share Posted November 6, 2006 Oil temp gauge is light grey/green Oil preesure gauge is light green Oil light is white/brown The biggest one is the oil pressure transmitter for the gauge. Oil temp sender points downwards Quote Link to comment Share on other sites More sharing options...
Shackleton Posted November 7, 2006 Author Share Posted November 7, 2006 guys, sweet info... thats perfect and yeah the 'pot' type thingy is akin to your Disco one Western. So thats the pressure guage sender. That (along with the light sender) is what the late lump doesn't have. Is it swoppable over? Oh and my pressure sender has two contacts on it but only one ever had anything plugged into it. The pressure guage worked fine but the temp guage never worked? Could the second contact be a built in temp sender? Oh just realised I have a pic.... of both early and late filter housings See in the second pic theres a boltjust over the temp sender wire, right on the edge of the housing - could either of the 'extra' early senders that aren't on the later car be offered up there? Quote Link to comment Share on other sites More sharing options...
Shackleton Posted November 13, 2006 Author Share Posted November 13, 2006 The answer is yes.... In fact I would say (based on a brief look yesterday) that all three senders are interchangable between early and late housing. Quote Link to comment Share on other sites More sharing options...
reitsma Posted November 13, 2006 Share Posted November 13, 2006 @shackleton: I've got some sort of the same problem, bought a set of aftermarket gauges (oil pressure&temp) for my '86 carb. V8 but haven't got a clue where to put them... (the sender units that is). You managed to put them installed? Where did you put them? Got any pictures..? I've got the original sender for the dashboard warning light in place in the engine bay, but need place for both temperature and pressure sender units, are there any 'free' outputs I can use? Thanx... Quote Link to comment Share on other sites More sharing options...
Shackleton Posted November 14, 2006 Author Share Posted November 14, 2006 I'm gonna offer mine up.... Here... and here.... Note though - the arrow that looks like it's pointing at an existing sender is actually pointing to another bolt around the back... Quote Link to comment Share on other sites More sharing options...
reitsma Posted November 14, 2006 Share Posted November 14, 2006 must be possible with 2 extra units so it looks like... I will give it a go with the new ones on the places you pointed out. I'll let you know. Quote Link to comment Share on other sites More sharing options...
western Posted November 19, 2006 Share Posted November 19, 2006 Found this picture in EPC Defender V8 section it shows the oil pressure & oil temp sender units, hope it helps. remove item 14 & fit item 13 & 15 [oil temp sender] & remove blanking bolt & fit items 11 & 12 [oil pressure sender] Quote Link to comment Share on other sites More sharing options...
Shackleton Posted November 20, 2006 Author Share Posted November 20, 2006 Bolted the pressure on at the weekend - couldnt' get her running but I'm sure that once she fires the sender will work - the aperture HAS to be for a pressure sender.... Quote Link to comment Share on other sites More sharing options...
western Posted November 20, 2006 Share Posted November 20, 2006 the left red arrow in your thumbnail pic above is the correct location for the oil pressure gauge sender, compare it to the parts page above. Quote Link to comment Share on other sites More sharing options...
Shackleton Posted November 21, 2006 Author Share Posted November 21, 2006 just to note that thats a different housing then - well certainly then whats on my 1990 EFI, theres another seperate collar between the main housing and the filter that has the unions for the oil pump. But I suppose it's the main housing that counts. The housing on my '73 3.5 is almost directly comparable to the '90 unit - so I've literally mirrored one to the other. But that places the pressure sender at the right red arrow position Quote Link to comment Share on other sites More sharing options...
reitsma Posted December 14, 2006 Share Posted December 14, 2006 I was thinking this set up regarding transmitters, any comments on that? Quote Link to comment Share on other sites More sharing options...
Shackleton Posted December 15, 2006 Author Share Posted December 15, 2006 Fella I replied on the other forum too - I offered up the sender and it works... But your arrows should read left to right: Oil pressure, blank, oil temperature Quote Link to comment Share on other sites More sharing options...
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