_Rob_ Posted September 6, 2006 Share Posted September 6, 2006 Just fitted my Fluidyne rad and in the process of filling up the cooling system. My problem is the little screw in brass sensor at the bottom of the rad is leaking, only dripping mind, but still, its leaking. Ive had it back out and inspected the threads and O ring seal and all seems fine n dandy. Ive refitted it with a washer and a secondry O ring after the threads, this made it better, but its still dripping! is there anything that can be done to this to stop the leak? a gasket of some sort? or a thicker O ring? i dont want to carry on filling and getting rid of air only to have to drain the rad again! thanks guys! Link to comment Share on other sites More sharing options...
TRD3000GT Posted September 6, 2006 Share Posted September 6, 2006 Apparently its a common thing with these rads... You need to use LOTS of PTFE tape on the sensor to stop the leak. Link to comment Share on other sites More sharing options...
LeeT Posted September 6, 2006 Share Posted September 6, 2006 i agree with Chris, get yourself some PTFE tape for around 30p and wrap that around the threads Link to comment Share on other sites More sharing options...
_Rob_ Posted September 6, 2006 Author Share Posted September 6, 2006 Ahh, Martin mentioned PTFE when i ordered the rad but i wasnt sure where about to put it! so actually wrap it around the thread of the sensor? Link to comment Share on other sites More sharing options...
LeeT Posted September 6, 2006 Share Posted September 6, 2006 Ahh, Martin mentioned PTFE when i ordered the rad but i wasnt sure where about to put it! so actually wrap it around the thread of the sensor? yes Link to comment Share on other sites More sharing options...
TRD3000GT Posted September 6, 2006 Share Posted September 6, 2006 yes Quite a bit of it as well Im told.. 5 -6 ish wraps till you can barely get the sensor in then take off one wrap at a time... Link to comment Share on other sites More sharing options...
Guru Posted September 6, 2006 Share Posted September 6, 2006 What's PTFE tape? Link to comment Share on other sites More sharing options...
JamieP Posted September 6, 2006 Share Posted September 6, 2006 What's PTFE tape? Its a white tape look in plumbing section at b&q;) Link to comment Share on other sites More sharing options...
Pixelfill Posted September 6, 2006 Share Posted September 6, 2006 PolyTetraFluoroEthylene (I'm sure I spelt that wrong) It's a really thin tape used by plumbers to seal the threads of threaded connectors. otherwise the thread is one long helter skelter slide for fluids to escape down. It's dirt cheap, but apparently can't be used for oil or hydraulics, I guess coolant is okay. Mike Link to comment Share on other sites More sharing options...
Simon Posted September 6, 2006 Share Posted September 6, 2006 Coolant is OK and make sure you wrap it in the opposite direction of the thread Link to comment Share on other sites More sharing options...
TRD3000GT Posted September 6, 2006 Share Posted September 6, 2006 It's dirt cheap, but apparently can't be used for oil or hydraulics, I guess coolant is okay. Mike Its fine on the oil feed and return on our cars. Titan and many of the big US tuning houses use it I have for years without any problems.. Link to comment Share on other sites More sharing options...
Pixelfill Posted September 6, 2006 Share Posted September 6, 2006 Ah Chris, that's interesting, and good news. I was just going off something Chris Wilson posted in an oil filter relocation thread a while back. Mike Link to comment Share on other sites More sharing options...
TRD3000GT Posted September 6, 2006 Share Posted September 6, 2006 Just make sure its ON the thread only and does NOT go over the end of the fitting at all. Give it a few mm Link to comment Share on other sites More sharing options...
SimonB Posted September 7, 2006 Share Posted September 7, 2006 Ah Chris, that's interesting, and good news. I was just going off something Chris Wilson posted in an oil filter relocation thread a while back. Mike That was a different thing. There are two types of thread used for oil connections like that. If you have a straight thread (i.e. BSP) you need a dowty seal which is a kind of washer with a rubber bit in the middle. PTFE tape won't seal a thread like that because the threads don't lock together, there will always be a small gap between them. If you have a tapered thread like NPTF you need PTFE to stop oil working its way round the threads. Link to comment Share on other sites More sharing options...
Pixelfill Posted September 7, 2006 Share Posted September 7, 2006 Ah okay, thanks Simon, that makes a lot of sense now. It was your thread I was thinking of, the one with the Mocal cooler bits Mike Link to comment Share on other sites More sharing options...
Guru Posted September 7, 2006 Share Posted September 7, 2006 PolyTetraFluoroEthylene (I'm sure I spelt that wrong) It's a really thin tape used by plumbers to seal the threads of threaded connectors. otherwise the thread is one long helter skelter slide for fluids to escape down. It's dirt cheap, but apparently can't be used for oil or hydraulics, I guess coolant is okay. Mike Cheers mate Link to comment Share on other sites More sharing options...
_Rob_ Posted September 7, 2006 Author Share Posted September 7, 2006 For the record, the PTFE was a winner on the rad sensor. Ran the car, no drips. Left over night, no drips. thanks guys..! Link to comment Share on other sites More sharing options...
TRD3000GT Posted September 7, 2006 Share Posted September 7, 2006 Your very welcome Link to comment Share on other sites More sharing options...
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