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Old 22-12-13, 03:11 PM   #1
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Default Coolant leak!

I think I have a coolant leak in my car:

Peugeot 307
2001 mod
1,6
156 000 km

Looks like it is some "irr" from the thermostat housing unit house, (look on pic) .

It is a packing that is inside, so you have to remove the whole "thermostat house unit". Is it someone that knows if it is normally to have "irr" in these place, and could check in their car ? I can see its more when its really hot (in summer time).

I noticed the problem in May, after the garage had replaced the timing belt and water pump, and had flushed the cooling system. But I cant see anything dripping from the area with the timing belt, so I think it leaks from the housing unit. The thing is that for 2 years ago (only 16000 km) the garage changed the pack in the housing unit, so I think its a bit weird if it is the pack again! I have to refill some coolant fluid just sometimes (maybe a little bit after two tanks of gas or so) , so the leak is small.
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Old 22-12-13, 03:28 PM   #2
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Join Date: Feb 2012
Location: margate kent ct9 1ly
Posts: 114
Smile hi

hi had same problem last week. i put some K SEAL IN HEADER TANK no more leaking i would give it a try first only about 9 or 10 danny
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Old 22-12-13, 03:38 PM   #3
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Default

Ok but I think it wouldnt solve the "real" problem. Also I have this annoying issue. I think the engine is overheating a bit sometimes .....Especially in summer times driving "city driving" the engine gets a bit hot, like 100 C before the fans kick in and it goes down. I think the effect of the engine becomes worse of this. Also I dont remember it was like this a few year backs, but used to happen in like two years ago. I have replaced the thermostat. Maybe a flowing issue?
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Old 25-12-13, 08:10 PM   #4
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Default Coolant leak

the thermostat housing, with hose connector is one of the worst that I have ever encountered.

The assembly is held in place with two bolts and being made of plastic, doesn't provide the best pressure for the full diameter of the seal. Eventually some corrosion of the metal surface occurs and thus allows coolant to leak around the seal.

A new housing can be found via eBay for less than $20 ( having just done this myself).

Be very careful when undoing the bolts, best to spray with WD40 or similar about a day before removing, as it is possible to shear the bolts as happened with me.

Discard the old bolts and replace with high tensile bolts which one can get from a hardware store.
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Old 25-12-13, 08:49 PM   #5
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Default Sonoma

Sonoma:

So why does it help with a new housing ? And why doesnt only a new seal helps ?

Is it by the way hard to unscrew the device and put a new one in place ? Does the new housing need a new sealing?
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Old 25-12-13, 09:07 PM   #6
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Default New housing

New housing comes as a complete assembly. Thermostat and seal included.

The old seal will be corroded as well as the mounting block surface, so clean up the surface of the mounting block before fitting the new housing.

Old housing will be warped due to heat, pressure and age.

Spend a few bucks and do the job right.
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Old 25-12-13, 09:13 PM   #7
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You know this is the housing im talking about ?

Look herehttps://www.google.no/search?q=therm...59%3B300%3B225


and I had a new thermostat last winter, so its almost new.. Is the housing difficult to change?
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Old 25-12-13, 09:57 PM   #8
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Default Thermostat

The thermostat and housing connect to the water pump. It has a connector for the inlet hose.

If they jus replaced the thermostat only, then they most likely have done you no favours, as it would have left an old, hardened seal and warped housing in place. Also they may not have cleaned up the mounting surface.

Two bolts, nothing so difficult if you have a 10mm ring spanner or socket spanner. A pair of pliers will be needed to undo the hose clip.

These guys have them advertised.

jolly good car spares ltd
geoff williams
gorsey bank farm
shifnal
Shropshire
tf11 8jg
United Kingdom

Phone:01952|691329
Email:[email protected]
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Old 25-12-13, 11:06 PM   #9
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Hello, I am talking about this whole unit.. Look at pic.

The garage did replace the pack wich lies into the engine, but I think its leaking again .... I my self did last winter replace ONLY the thermostat, and the thermostat doesnt leak.

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