- Joined
- Nov 22, 2008
- Messages
- 2,698
- Location
- Leeds, West Yorkshire
- Car
- E280CDI SPORTS ESTATE and C200 KOMPRESSOR SE Coupe Auto (1.8 lit petrol)
Evening Buddies
On Saturday, my beloved E300TD sprang a bad oil leak on the inboard coupling union to the oil cooler rad in front of the N/S front wheel.
God knows why - It just happened out of the blue.
![Frown :( :(](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f641.png)
Oil all over the place !!
Shouldn't have too much rust around there for a while !
Easy I thought.
Must be the seal between the steel oil pipe and the aluminium heat exchanger.
I got two open-ended spanners ... One on the nut and one to support the square section boss of the heat exchanger.
It's the right-hand-side one in the photo.
Will it unscrew ?
Will it heck.
The nut appears to be rusted solid to the pipe.
Not to the threaded union on the heat exchanger, where there is a very small amount of rotation.
I am presuming that the nut should rotate on the pipe.
(It must do)
After much application of wire-brushing, WD-40, some heat and very gentle application of a Barnsley enforcer (a tap with the hammer), it still won't budge.
It's not easy to support the pipe and get a lot of rotational force on the nut.
I've left it to soak overnight with another application of WD-40.
Has anyone done this before ?
What type of seal goes between the pipe and the heat exchanger.
Part Number ??
Advice please
Thanks
Johnsco
On Saturday, my beloved E300TD sprang a bad oil leak on the inboard coupling union to the oil cooler rad in front of the N/S front wheel.
God knows why - It just happened out of the blue.
![Frown :( :(](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f641.png)
Oil all over the place !!
Shouldn't have too much rust around there for a while !
Easy I thought.
Must be the seal between the steel oil pipe and the aluminium heat exchanger.
I got two open-ended spanners ... One on the nut and one to support the square section boss of the heat exchanger.
It's the right-hand-side one in the photo.
Will it unscrew ?
Will it heck.
The nut appears to be rusted solid to the pipe.
Not to the threaded union on the heat exchanger, where there is a very small amount of rotation.
I am presuming that the nut should rotate on the pipe.
(It must do)
After much application of wire-brushing, WD-40, some heat and very gentle application of a Barnsley enforcer (a tap with the hammer), it still won't budge.
It's not easy to support the pipe and get a lot of rotational force on the nut.
I've left it to soak overnight with another application of WD-40.
Has anyone done this before ?
What type of seal goes between the pipe and the heat exchanger.
Part Number ??
Advice please
Thanks
Johnsco
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