cheesy 0 Posted July 25, 2011 This is on my blue 16v From the start I put in a replacement engine in It had geniune VW cambelt, tensioner, Thermostat & water pump fitted New flanges,Gaskets & seals Beru Plugs New dizzy cap & arm KR Cam New oil cooler Used sensors off the old engine which to my knowledge were all a ok Quantum oil & gen filter Mk4 Expansion tank conversion G12+ Once i had the engine running on the drive Water,oil temps & levels were spot Did this a few times over the space of a few weeks & couple of trips of couple miles round the vilage again temps & levels all ok Few weeks passed & it was time for its first longer journey about 12 miles to my folks Once out onto the main dual carriageway & took my time Car was driving ok, driving around the 50-65mph But then i noticed the temps Water 100 Oil well into the 120's SO I looked into checking things over & seeing that the hoses/pipes get hot Oil is oil & water is nice & clean Water returning to tank Top & bottom Hoses get hot Heater Gets hot, again both pipes to matrix get hot All other associated hose/pipes get hot Fan kicks as it should But when the temps stay up is on almost all the time Whilist doing this found the main earth cable to gearbox loose Tighten up After a few ideas as to what to try next or something i;ve missed ??? Quote Share this post Link to post Share on other sites
davidwort 0 Posted July 25, 2011 It could be a partial blockage in the radiator, enough flow to get both hoses hot when stat opens but not enough flow to keep the temps right down. Quote Share this post Link to post Share on other sites
P3rks 11 Posted July 25, 2011 Or maybe a pressure leak in the system? Is the system over pressurising or losing pressure? What colour expansion and cap has it got? Black is old and pap, blue are the replacements and better. Even then at £7 odd from TPS it might be worth a renewal? Quote Share this post Link to post Share on other sites
cheesy 0 Posted July 25, 2011 Cheers for that david, gave the rad a good flush threw, made a little difference but still something amiss enthusiastowned, expasion tank & cap is all new & mk4 conversion Quote Share this post Link to post Share on other sites
cheesy 0 Posted August 17, 2011 Been flat out with work for a few weeks I drained the colant flushed the system Found the geniune thermostat that i fitted which has only done a few run ups on the drive & the 20 odd mile drive FAILED Closed permanently Stat changed as faulty at dealers today Refitted new one upto temp & a 20mile drive & all seems ok Now just to get the ignition timing set up Quote Share this post Link to post Share on other sites
cheesy 0 Posted September 23, 2011 well looks like that thermostat has failed now this is crazy i'm starting to think something else is wrong Quote Share this post Link to post Share on other sites
Rustynuts 0 Posted September 23, 2011 You can run it without the thermostat for a bit, only it won't warm up very quickly. The real issue here must he the stats though. I once bought a new one that would not open when I tested in a pan on the stove. So just put the old one in that worked ok. You can't overheating the stat so sounds all a bit strange Quote Share this post Link to post Share on other sites
