iain Posted January 16 Report Share Posted January 16 I found with my engine that plugging the bypass caused over cooling, even with increasing sizes of hole through the bung. I took it out completely and the engine now runs at normal temperatures……strange these Tr’s. Quote Link to post Share on other sites
Z320 Posted January 16 Report Share Posted January 16 (edited) 11 hours ago, BlueTR3A-5EKT said: Just reviewed this very useful thread, my 4mm drill hole in the cork is really wrong. Drilling the restrictor to 8-9mm is the way to go as proved by Marco’s investigations. I now turn up brass plug with a 9 mm hole to fit the large hole type housing. It simply taps into place. Most owners now use the waxstat type thermostat. Marco. The internal thread in the TR2-4 water pump housing bypass connection is a modification advised in ‘More BS about TR’s. By Bob Schiller. The idea was to buy a regular plumbing fitting and screw it into the threaded hole to block the tube. This is aimed at TRs in hot states like Arizona. Read it here. . https://drive.google.com/file/d/0B2H2NJt34OffMmE1YTU0YzctMTQyOC00MmJmLWFiZGItNTI5ZjI3N2NjZTIy/view?resourcekey=0-lXvz6nHUvMR_xQs2mCWxmA Hi Peter, interestng to know, this TR3 water pump housing with threaded bypass I bought from the USA. But the plug was missing. Perhaps another one finding out the bypass is needed for the engine in some situations. Ciao, Marco Edited January 17 by Z320 Quote Link to post Share on other sites
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