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      04-10-2018, 01:26 PM   #1
BMWguy206
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Coolant Leak on Connector Pipe (Cylinder Head)

Hey guys,

A friend has a 2010 335d and there is a very small coolant leak coming from a plastic connector pipe on the drivers side of the cylinder head right underneath the intake manifold. The dealer said that the intake manifold has to come off to replace it. Has anyone ever replaced this before or know if the manifold has to come off?

Thanks in advance.
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      04-10-2018, 01:29 PM   #2
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Yes, the manifold will need to come off. It's really not hard to remove though.

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      04-10-2018, 01:33 PM   #3
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Quote:
Originally Posted by Torqu3 View Post
Yes, the manifold will need to come off. It's really not hard to remove though.

Thanks for the info.
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      04-15-2018, 10:47 PM   #4
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Quote:
Originally Posted by BMWguy206 View Post
Hey guys,

A friend has a 2010 335d and there is a very small coolant leak coming from a plastic connector pipe on the drivers side of the cylinder head right underneath the intake manifold. The dealer said that the intake manifold has to come off to replace it. Has anyone ever replaced this before or know if the manifold has to come off?

Thanks in advance.

wait, so where is this connector located again ? cis there any way you or your friend can be more specific where exactly this leak is coming from, because i noticed i also have a slight coolant leak but couldn't find where its coming from (at least nothing that i can point out right way by opening the hood)
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      04-15-2018, 10:59 PM   #5
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Quote:
Originally Posted by 3wis3m3n View Post
wait, so where is this connector located again ? cis there any way you or your friend can be more specific where exactly this leak is coming from, because i noticed i also have a slight coolant leak but couldn't find where its coming from (at least nothing that i can point out right way by opening the hood)
The connector is located on the cylinder head on the drivers side. It's where the upper radiator goes to. The connector is made out of plastic but it also has a profile gasket that goes between the connector and head.

We were able to replace the connector without fully removing the intake manifold. We did have to remove the bolts for the manifold to loosen it up to get better access to the 3 bolts holding it down. We also replaced a leaking heater pipe (located under the EGR cooler), a coolant hose that goes to the transmission cooler and expansion tank, and the expansion tank itself.
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      04-16-2018, 12:36 AM   #6
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Quote:
Originally Posted by BMWguy206 View Post
The connector is located on the cylinder head on the drivers side. It's where the upper radiator goes to. The connector is made out of plastic but it also has a profile gasket that goes between the connector and head.

We were able to replace the connector without fully removing the intake manifold. We did have to remove the bolts for the manifold to loosen it up to get better access to the 3 bolts holding it down. We also replaced a leaking heater pipe (located under the EGR cooler), a coolant hose that goes to the transmission cooler and expansion tank, and the expansion tank itself.


ok by looking at the video that torque posted...

the upper radiator hose that your talking about
is it the one thats located right above the oil filter housing ? the connector at the end of that hose that goes into the head right ?
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      04-16-2018, 12:41 AM   #7
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Quote:
Originally Posted by 3wis3m3n View Post
ok by looking at the video that torque posted...

the upper radiator hose that your talking about
is it the one thats located right above the oil filter housing ? the connector at the end of that hose that goes into the head right ?
Yes
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      04-17-2018, 07:42 PM   #8
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Update: Ended up replacing the connecting pipe next to the cylinder head, a heater pipe underneath the EGR cooler, a coolant hose, and an expansion tank. Two hundred miles later, the water pump pulley came off and coolant is leaking from the water pump.
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      04-17-2018, 07:53 PM   #9
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Woah. I think thatís the first waterpump pulley failure posted here.

Im glad I preventively replaced my pumps. I was beginning to think it was a waste of money/ time until I saw your post.

I hope you get her up and running quick!


Quote:
Originally Posted by BMWguy206 View Post
Update: Ended up replacing the connecting pipe next to the cylinder head, a heater pipe underneath the EGR cooler, a coolant hose, and an expansion tank. Two hundred miles later, the water pump pulley came off and coolant is leaking from the water pump.
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      04-17-2018, 09:14 PM   #10
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Originally Posted by 335dsleeper View Post
Woah. I think thatís the first waterpump pulley failure posted here.

Im glad I preventively replaced my pumps. I was beginning to think it was a waste of money/ time until I saw your post.

I hope you get her up and running quick!

Man, by the looks of that pump, that makes me want to replace mine right now
103k miles still on stock pump. Idk if thats suppose to be good or bad
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      04-17-2018, 09:25 PM   #11
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Quote:
Originally Posted by 3wis3m3n View Post
Man, by the looks of that pump, that makes me want to replace mine right now
103k miles still on stock pump. Idk if thats suppose to be good or bad
Vehicle has 100,470 miles.
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