KarlH Posted February 25, 2012 Share Posted February 25, 2012 Reading something on here recently I noticed mention of the heater bypass hose. I don't have a heater, nor do I have a bypass hose - the point on the water rail is capped off as is the other side. Should a bypass hose be fitted, does it make any difference or not? Link to comment Share on other sites More sharing options...
Wrightpayne Posted February 25, 2012 Share Posted February 25, 2012 Which engine? If it's a K the it should have a the hose fitted between the t stat housing and water rail. (according to posts on here). Ian Link to comment Share on other sites More sharing options...
KarlH Posted February 25, 2012 Author Share Posted February 25, 2012 Knew I'd miss out the important bit of info! It's a 1.8 K. Maybe I'm just getting confused - I'll have a look tomorrow and see what's plumbed in where. Edited by - KarlH on 25 Feb 2012 21:40:08 Link to comment Share on other sites More sharing options...
Shad Posted February 25, 2012 Share Posted February 25, 2012 I seem to remember that you don't need the bypass hose there, but it helps with circulation? Link to comment Share on other sites More sharing options...
CharlesElliott Posted February 25, 2012 Share Posted February 25, 2012 If you have no bypass hose, that's fine as long as you don't have a thermostat either. Is it an ex-race engine? They are often like this. Link to comment Share on other sites More sharing options...
KarlH Posted February 25, 2012 Author Share Posted February 25, 2012 Quoting CharlesElliott: If you have no bypass hose, that's fine as long as you don't have a thermostat either. Is it an ex-race engine? They are often like this. Ah, ok - that could explain it then. The previous owner used it for sprints and hillclimbs, maybe he removed the thermostat . Now you've said that I'm sure Dave Walker commented that it either didn't have one or it wasn't working when I was up there. Is there an easy way of telling if one is fitted or not? Would there be any difference in temperature behaviour - for example the water temperature never seems to get that high unless I'm sat in traffic for ages but on the move it seems to run quite cool or is that nothing to do with it?! Link to comment Share on other sites More sharing options...
pebblebuoys Posted February 26, 2012 Share Posted February 26, 2012 Sounds like you have no thermostat. My 1.6K has holes drilled in the thermostat and never gets up to temp. That's with almost half the rad blocked off. I'm about to fit a PRRT. Start the engine and feel the radiator, if it starts to feel warm pretty soon, then chances are you haven't got a thermostat. Plus, you must have a return path for the water, otherwise you would have no coolant flow, so if the heater bypass has been removed, then there must be another return path. Link to comment Share on other sites More sharing options...
KarlH Posted February 26, 2012 Author Share Posted February 26, 2012 Ok, I'll give that a go later. I was going to fit the QED remote stat, if there isn't one fitted I take it I won't have to go through the pain of putting in that blanking ring or whatever it is when you take the stat out? Link to comment Share on other sites More sharing options...
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