charlie_pank Posted December 5, 2011 Share Posted December 5, 2011 Can anyone give me the thread size and resistance characteristics of: 1) Oil temp sender as fitted with apollo tank? 2) Water temp sender as fitted in standard K-installation to drive analogue temp gauge in middle of dash? Ta Link to comment Share on other sites More sharing options...
Steve Sheldon Posted December 5, 2011 Share Posted December 5, 2011 Oil Temp sender is 1/8NPT - www.raceparts-direct.com - P/No: RTECOT1/8 Link to comment Share on other sites More sharing options...
charlie_pank Posted December 5, 2011 Author Share Posted December 5, 2011 1/8 NPT not 1/8 BSP? I only ask as some other fittings I have on the car are BSP and the two are apparently very similar but not identical! Link to comment Share on other sites More sharing options...
Roger Ford Posted December 5, 2011 Share Posted December 5, 2011 They're both the same IIRC. Link to comment Share on other sites More sharing options...
tbird Posted December 6, 2011 Share Posted December 6, 2011 Not sure they are truly compatible BSP v NPT Tim Link to comment Share on other sites More sharing options...
Bricol Posted December 6, 2011 Share Posted December 6, 2011 They aren't. However, at 1/8th, and with brass bodied senders, use of some sealant, and a slight grimace as you now know you are wrecking one of the threads, they will go together and seal. Bri Link to comment Share on other sites More sharing options...
charlie_pank Posted December 6, 2011 Author Share Posted December 6, 2011 Quoting ssheldon: Oil Temp sender is 1/8NPT - www.raceparts-direct.com - P/No: RTECOT1/8 Thanks, do you know what the resistance characteristics are (ie what is resistance at 0 and 150 C) C Link to comment Share on other sites More sharing options...
Steve Sheldon Posted December 6, 2011 Share Posted December 6, 2011 What strange advice - I have just fitted mine and it was 1/8 NPT - why would you want to force on 1/8 BSP? Link to comment Share on other sites More sharing options...
Steve Sheldon Posted December 6, 2011 Share Posted December 6, 2011 Sorry, no idea. suggest you talk to Raceparts and ask them if they can help. this is very common sender so info should be available. VDO also sell them - another port of call. Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 Raceparts say that their sender is unlikely to work with the Caterham gauge. Caterham say their gauges have a tapered thread, which means I'm unlikely to be able to find an adaptor to fit any standard thread. So I really need to find out the resistance characteristics of the standard Caterham water temp sender so that I can find an equivalent that'll talk to the gauge. Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 very helpful guy at VDO can figure out an alternative if someone could just give me the part # for the original Caterham coolant temp sender (the sender to the gauge NOT the ECU) as fitted to a 2001 K series? C Link to comment Share on other sites More sharing options...
Roger Ford Posted December 8, 2011 Share Posted December 8, 2011 Am I missing something here? Why not buy it from Caterham? Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 you ARE missing something. Caterham will sell me a sender that will talk to my gauge, but I don't have the engine to fit it into any more, so I'd have to find a way of making a tapered female thread to match it. Given that: 1)Caterham can't tell me the thread size 2)I don't have a thread gauge or a tap and die set 3)or a means of drilling a tapered hole I decided it would be easier to find another sender with the same resistance characteristics with a sensible, known thread-size that I can get an adaptor for to fit the 5/8UNF or 3/8BSP fitting that I'm going to splice into the coolant hose. Link to comment Share on other sites More sharing options...
Roger Ford Posted December 8, 2011 Share Posted December 8, 2011 Ah, I see. Would it help if I dropped into Think Automotive and asked them what the thread is and/or asked them for an adapter? I have a spare sender in my parts box. I suspect trying to match the electrical characteristics might be quite hard. Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 Yes it would, if you can discover what the thread is and what the part-number is that would be extremely helpful. Link to comment Share on other sites More sharing options...
Roger Ford Posted December 8, 2011 Share Posted December 8, 2011 I'm not sure they'd be able to tell me the part number but they can probably tell me the thread. Will see what I can do. Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 You're a * Basically if they can supply a bunch of bits that I can use to fit that sender into a 32mm coolant hose adaptor(TGA4M) then I'd like it added to order OR304486, which I'm happy to call up and pay for! Link to comment Share on other sites More sharing options...
CharlesElliott Posted December 8, 2011 Share Posted December 8, 2011 They are tapered 1/8" NPT Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 The power of blatchat! Is 'tapered 1/8 NPT' a standard? Are all the tapers of the same angle etc..? Link to comment Share on other sites More sharing options...
Roger Ford Posted December 8, 2011 Share Posted December 8, 2011 Seems to be an ANSI standard: here. Link to comment Share on other sites More sharing options...
Roger Ford Posted December 8, 2011 Share Posted December 8, 2011 And it appears the T in NPT is for tapered - so this was actually answered earlier. Do you still need me to go to Think? Link to comment Share on other sites More sharing options...
CharlesElliott Posted December 8, 2011 Share Posted December 8, 2011 1/8 NPT is a common/standard sender thread. Link to comment Share on other sites More sharing options...
CharlesElliott Posted December 8, 2011 Share Posted December 8, 2011 More info here. Roger - you must already know the characteristics of the sender, because you have it feeding your Dash2? Link to comment Share on other sites More sharing options...
charlie_pank Posted December 8, 2011 Author Share Posted December 8, 2011 No, Roger, if we know it's a 1/8 NPT, I can get an adaptor for it to fit in the 3/8 BSP mounting for the coolant sender. Thanks very much for the offer and thanks to all for answering enough of my questions to allow me to order the bits and get on with it! Charlie Link to comment Share on other sites More sharing options...
Roger Ford Posted December 9, 2011 Share Posted December 9, 2011 Roger - you must already know the characteristics of the sender, because you have it feeding your Dash2Sort-of true, but that was pre-configured when I got it, and I don't think I can extract the table again. Also, it's not very accurate, it shows 64 degrees when the fan comes on, which should be a lot higher. One day I'll get around to reconfiguring it. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now