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Post by mccarefree on Aug 3, 2008 20:52:30 GMT
Ok guys. If I want to fit a head without a bypass onto a car that had one, do I have to do anything other than plug the existing water pump (or replace it with a non bypass type)? Cheers. M.  |
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Post by paul1275s on Aug 3, 2008 21:02:35 GMT
you need to drill a hole in the thermostat or buy a thermostat blanking sleeve and run the car without a 'stat. not sure about the size of hole, i think probably about 5mm, although saying that my green car has been running like this and i have never had any problems without drilling the hole although i do run it in the summer with a blanking sleeve.
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Post by paul1275s on Aug 3, 2008 21:09:12 GMT
Stolen from Keith Calver on the Mini Spares Website Back to thermostats for a moment. It is common practice to remove this and fit a blanking sleeve in a bid to improve cooling. If this is done, you must blank off the by-pass hose, otherwise stagnant areas of water will occur causing the dreaded hot-spots. However, the danger with fitting a blanking sleeve is that the engine may not reach proper operating temperatures, and this can be every bit as bad as running a little too hot. I would strongly advise using a thermostat in ALL road cars, of at least 82 degrees to make sure the correct running temperatures are achieved. A blanking sleeve is not the answer to over-heating problems. I always run a thermostat in my race engines unless bound for foreign shores where high ambient temperatures are experienced. Many folk think that they have to fit a blanking sleeve if they are blanking off the by-pass hose. Not so. Blank off the troublesome by-pass hose then fit a thermostat that has had six or eight eighth-inch holes drilled around the periphery. These holes allow water to circulate before the engine is up to temperature and the thermostat opens. www.minispares.com/Article.aspx?aid=90 |
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Post by monkeyjim on Aug 4, 2008 19:40:27 GMT
Always fitted a stat with 6 1/8 holes drilled in it when fitting a Metro engine or any head without the by-pass tube . Obviously a non bypass waterpump to . If you dont know how old the pump is for the sake of £15 its worth putting a new non bypass pump on anyway .
Never had overheating issues with this set up.
D
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Post by oldgit on Aug 4, 2008 19:52:59 GMT
Always fitted a stat with 6 1/8 holes drilled in it when fitting a Metro engine or any head without the by-pass tube . Obviously a non bypass waterpump to . If you dont know how old the pump is for the sake of £15 its worth putting a new non bypass pump on anyway . Never had overheating issues with this set up. D Ditto thats whats been done on GT and beany's . |
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Post by mccarefree on Aug 4, 2008 21:54:18 GMT
Gentlemen, I thank you all. I knew I'd seen something about it. Now I'll not make a right c0ck of it, come fitting time! Cheers! MMc.
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