Pete Attryde Posted December 14, 2006 Share Posted December 14, 2006 As above can anyone tell me what the thread size and pitch are for the oil pressure switch and sump plug on a 300 TDi. I want to put a oil pressure gauge and a oil temp gauge on my truck and I want to get an adapter for the pressure switch to allow me to run both and I want to replace the sump plug with a temp sender for the oil temp. Thanks in advance, Pete. Quote Link to comment Share on other sites More sharing options...
Countax Posted December 14, 2006 Share Posted December 14, 2006 Pete, I know this is no comfort, but the sump plug on a 300TDi is a real odd size. I can't remember the exact size but i think its a 19TPi something.... I recently had to re thread mine as the plug was cross threaded. I took a new plug to a local engineering works and they went through their old bin of taps and dies and eventually found the right one. I think this is the best way to find out the size unless someone else comes up trumps with the correct size. Good luck. Nigel Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted December 15, 2006 Author Share Posted December 15, 2006 Thanks, I may just get a boss brazed in to the sump for the sender in that case, however I could still use the thread size for the oil light pressure switch so that I can get an adapter. Pete. Quote Link to comment Share on other sites More sharing options...
Tonk Posted December 15, 2006 Share Posted December 15, 2006 AFAIK they are M10 x 1mm pitch. i could be wrong though, demon tweeks is where i got my T piece Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted December 15, 2006 Author Share Posted December 15, 2006 Cheers Tonk, I am going to get one from demon tweeks but wanted to confirm the thread size before I ordered one. Pete. Quote Link to comment Share on other sites More sharing options...
MB_on_D110 Posted March 15, 2007 Share Posted March 15, 2007 As above can anyone tell me what the thread size and pitch are for the oil pressure switch and sump plug on a 300 TDi. I want to put a oil pressure gauge and a oil temp gauge on my truck and I want to get an adapter for the pressure switch to allow me to run both and I want to replace the sump plug with a temp sender for the oil temp. Thanks in advance, Pete. M10x1 it is the same as in older VW models. Note it is not conical thread conical thread will fit but will cause the casing damage with time. Quote Link to comment Share on other sites More sharing options...
freeagent Posted March 15, 2007 Share Posted March 15, 2007 the sump plug on my 300tdi disco is 1/4 BSP... i'm certain of this as i recently trashed the thread and had to re-tap it.. The difflock sump plug i bought also had a 1/4BSP thread on it.... Quote Link to comment Share on other sites More sharing options...
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