Thermostat Housing
#1
Thermostat Housing
Replaced the thermostat housing assembly this weekend on my 2009 MCS with 99,500 miles. Mine was leaking, I had tightened the three bolts but that made it leak more. I would say that it was leaking past the gasket as the gasket on the new housing is different, quite a bit larger. No sign of a crack in the plastic housing.
#2
You will not see the cracks , they are very small on the old ones , but when its up to pressure it will leak. When replacing: also make sure you clean an residue off the side of the head and then tighten down . You might have residue between the gasket and the head or the gasket did not seat right. Thats my guess without looking at it.
Here is a DIY link and what to looks for.
https://www.northamericanmotoring.co...hermostat.html
Parts: https://www.northamericanmotoring.co...rmostat-6.html
That's what the gasket should look like when seated. That back big pipe should be seated all the way into the rear water pipe tube also. Double check all the connections.
Thanks and good luck.
Here is a DIY link and what to looks for.
https://www.northamericanmotoring.co...hermostat.html
Parts: https://www.northamericanmotoring.co...rmostat-6.html
That's what the gasket should look like when seated. That back big pipe should be seated all the way into the rear water pipe tube also. Double check all the connections.
Thanks and good luck.
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#4
The gasket looked about the same from the last one. Hard to tell as when you take off the old one the gasket is smashed down. Maybe a hair thicker. Double check and make sure its seated like the one picture about. I would double check your work. Should not leak with a whole new assembly and gasket. Make sure nothing it pressing back the thermostat housing like the rear pipe.
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Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
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Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
#5
#7
Good , did you clean any gunk or residue off the head where the old gasket was, sometimes dirt can get on the outside, might be in the way. Also maybe the gasket was not seated ? Also did the bolts go all the way back in ?
That's all I can think of.
That's all I can think of.
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Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
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#8
#10
Looks like the old one is smashed down from being seated and compressed and the new one is wider ( new ) like it should.
__________________
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
#12
Cheap plastic will do that and I'm not just talking about the thermostat housing, the main pump is also plastic. When will BMW learn?
#15
Plastic impellers aren't the problem, it's the plastic housing. That's why even Mini now has metal water pumps with plastic impellers, the housing cracks long before the bearings fail in most instances.
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