water leak w210 e320 cdi

[sms78]

Hey guys the engine is leaking coolant on my w210 e320 cdi .
It is coming from what i think is called a heat exchanger which bolts to some kind of manifold. It looks like there is some kind of rubber bush sandwiched in between the heat exchanger and a upright water pipe coming from the bottom of the engine bay .
Looked on the russian site(intake & exhausts manifolds) and it is part no 77 and is called a heat exchanger and its the small rubber bush no 89 that i think has gone. Fixed it a couple of times by adding an additive and its lasted over a year but now i think its completely shot

Anybody had this before and is it hard to fix ? Any nasty surprises in taking this heat exchanger thingy off?

Hope you can help

 

[sms78]

bump

 

[BlackC55]

Have you a link to the part you are talking about?

 

[sms78]

No sorry i just saw it on the russian site on the exhaust and inlet manifold bit . Its called a heat exchanger or something and its leaking at the bush that goes in the bottom . Think its something to do with the water heating the fuel in cold conditions .

 

[sms78]

Google Translate

Part no 77 and 89 hope it works im rubbish with computers

 

[sms78]

part no 77 and 89 i did it i think hope you can see the picture. Its leaking from part no 89 the rubber bush thingy!

 

[BlackC55]

You need parts 83, 98 and 95. It is only a few bolts and simple to remove

 

[sms78]

Cool thanks I ll just get the gaskets then . Looked more complicated than it is i guess when you peer into the engine bay . When i enquired about it couple a years ago at the mercedes dealership ,one of their mechanics said i needed the whole thing,came to about 350£ + for parts ! I said sod that and put some additive in it which has held for ages .

Thanks for that

 

[sms78]

Fixed it !

Took the exhaust heat exchanger off today and renewed all the seals .Bit fiddly but not too bad just lack of room for my big hands Can't believe that part no 89 on the drawing was just a simple o ring and that it was causing so much trouble. Old o ring had crumbled to bits and i only found a small fragment left .


Big thanks to Black 55 for his excellent advice the car's now ready to roar again down the M1 to work tomorrow