Peaklander Posted February 8 Share Posted February 8 I am about to buy an EGT gauge with a probe (direct from the USA). I have been presented with a choice of fittings as you can see. I believe that they are often supplied with 1/8"NPT thread. I don't have a tap for that. I can specify an M8 or M10 thread and for that I do have a tap. The NPT thread is taper and I suppose that it might be more secure than M8 but then again would it? Any advice would be great. Which one would you go for? Quote Link to comment Share on other sites More sharing options...
Wytze Posted February 8 Share Posted February 8 Following this, thinking about doing this aswell. Quote Link to comment Share on other sites More sharing options...
hurbie Posted February 8 Share Posted February 8 watch out for the M8 and M10 threads , these are what is called "fine" pitch ... so your normal m8 and m10 tap won't fit ! 1 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 9 Author Share Posted February 9 I checked my box and I have M8 x1 but also 1/8” NPT. Result! Which to use though? 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 9 Share Posted February 9 NPT is most common for this sort of thing, if you ever had to swap it out you're more likely to find a direct replacement, IMHO. 4 Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 9 Share Posted February 9 I'd agree - 1/8" NPT is a super common thread for sensors and fittings, not hard to find a tap or die even here in metric land a lot of tap kits come with one by default. Quote Link to comment Share on other sites More sharing options...
Sigi_H Posted February 9 Share Posted February 9 M10x1 is very often used with brake callipers and connections. What do we learn from it? You never have enough tools 😁 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 9 Author Share Posted February 9 50 minutes ago, FridgeFreezer said: a lot of tap kits come with one by default. Just as I discovered. It does pay to go and look, rather than just ‘assuming’. Quote Link to comment Share on other sites More sharing options...
simonpelly Posted February 9 Share Posted February 9 Fitted one last year. Decided to weld the EGT boss at an angle to a blanking plate covering that is normally used for the EGR valve. In this way the EGT probe can get right into the middle of the exhaust gases without having to be bent. IMG_1547.MP4 1 1 Quote Link to comment Share on other sites More sharing options...
Popular Post simonpelly Posted February 9 Popular Post Share Posted February 9 Some more images. Hope it helps... 7 Quote Link to comment Share on other sites More sharing options...
fmmv Posted February 9 Share Posted February 9 That's very neat. Inspirational even. And gives a lot more thread than just a tapped hole. 1 Quote Link to comment Share on other sites More sharing options...
92a Posted February 9 Share Posted February 9 If anyone wants to start making ones like Simon made, I will be first in the queue, I gave an EGR blanking plate to an engineer friend but he just tapped it at 45 degrees and it looks awful 😢 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 9 Author Share Posted February 9 I will be second. I saw that orientation on a YouTube video and thought - "yes". Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted February 9 Share Posted February 9 28 minutes ago, Peaklander said: I will be second. I saw that orientation on a YouTube video and thought - "yes". 2 hours ago, 92a said: If anyone wants to start making ones like Simon made, I will be first in the queue, I gave an EGR blanking plate to an engineer friend but he just tapped it at 45 degrees and it looks awful 😢 What's the thread in the bung, if I have the right taps I could easily make a couple for you guys Regards Stephen Quote Link to comment Share on other sites More sharing options...
92a Posted February 9 Share Posted February 9 The thread is 1/8 npt Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 9 Author Share Posted February 9 Yes that is would I would get now. @Stellaghost that would be really great. Thanks. I’ll send a pm. I don’t know what that probe union thread is but a welded 1/8” angled nut would accept the whole thing. Quote Link to comment Share on other sites More sharing options...
soutie Posted February 9 Share Posted February 9 (edited) I have one fitted to my 110 200tdi. Bought it off a well know seller site for a price cheaper than fleabay. It is 1/8 NPT thread. I tapped the manifold when off the engine. Edited February 9 by soutie Wrong photo Quote Link to comment Share on other sites More sharing options...
muddy Posted February 9 Share Posted February 9 Try and get a 3mm probe over a 6mm you get a much better idea about what's going on. Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 9 Author Share Posted February 9 Is that because it responds more quickly due to thermal mass? Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 9 Share Posted February 9 1 hour ago, Peaklander said: Is that because it responds more quickly due to thermal mass? I’d expect so. Any particular reason for going for one from the states? Got to be a suitable supplier in the UK? Quote Link to comment Share on other sites More sharing options...
Sigi_H Posted February 10 Share Posted February 10 (edited) I used a flight instrument without any additional electronics and drilled the hole in the bottom plate of the turbo. (200Tdi) It was M10x1, because I already had it 😁 Unfortunately I cant´t translate my site with any webservice. No idea why. https://heiderei.ch/Abgastemperatur.html Edited February 10 by Sigi_H Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 10 Author Share Posted February 10 11 hours ago, landroversforever said: Any particular reason for going for one from the states? Got to be a suitable supplier in the UK? I am looking at Auber Instruments after following a link from a post on this forum. They do some nice panel mount displays, with a max memory and an alarm. Can buy with the probe too. Plus I can buy in $ 😜 1 Quote Link to comment Share on other sites More sharing options...
David Sparkes Posted February 10 Share Posted February 10 11 hours ago, landroversforever said: Any particular reason for going for one from the states? Got to be a suitable supplier in the UK? In years gone by, for EGT, I bought K type thermocouples, with cable, from a firm called Kalestead Ltd Network House 300-302 Cressing Rd Braintree CM7 3PG They still have a web presence https://kalestead.co.uk/ but appear to have changed slightly. I do not see thermocouples listed, and as today is Saturday the office is closed. I was feeding into a personally built interface, the 'display' was a laptop running Picoscope, in about 1999. Regards. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 10 Share Posted February 10 If it's just a thermocouple they're all over eBay for no money. Quote Link to comment Share on other sites More sharing options...
muddy Posted February 10 Share Posted February 10 Yes you can watch the temperature change quicker with a 3mm, I personally prefer an analogue gauge as you only need a rough idea. I bought glow shift from the states because I could get a matching diesel boost gauge. That VDO vision one above is very nice though... 3 Quote Link to comment Share on other sites More sharing options...
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