Reviving A -99 Tdm 850

[anda3243]

<!--sizeo:4--><!--/sizeo-->The Oil Tank
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The oil tank was one of the things that I thought will fit right away. But no, some of the hoses did not. The frame is a little different and there is no room for the hose from the oil tank to the place were oil filter is. And the oil filling hose from the 900 oil tank will not fit, it would need to be modified. Also I want to be able to check the oil level in the tank. The oil stick thats comes with the 900 tank will not be an option.
Could it be possible to use the oil tank from the 850 on the 900 engine. All hoses would fit right away. A closer inspection revealed that the bolt pattern is wery similar on both engines.

So, first take appart the 850 oil tank. After 50 000 km there is quite much dirt in the tank. I think it is a good idea to open and clean it sometimes.


Then take the bottom part of oil tank of the engine. One can see the gear shift drum and balander axel. The balancer weights pases the same place as lover end of the conection rods. [img]style_emoticons/<#EMO_DIR#>/good.gif[/img]


Removing the same cover from 900 engine. Looks similar.


Here the 900 engine with a new gasket for the 850 engine.


When comparing the covers one can see that the oil groove is curved on the 900 engine. Otherwise the covers are identical. The oil groove is probably for lubrication the outgoing shaft bearing, wich is located further out on the 6 speed 900 engine.


When fitting the bottom of 850's oil tank to the 900 engine the oil groove is sticking "out" from under the cover. See center of the image.
I was thinking that the best solution would have been to modify the cover by adding material to it (welding), and then evening it to get a good sealing surface. I think this would have been easier and more durable than using the 900 oil tank. But I did not have a aluminium welder, and didnt think that it would be so hard to fit the 900 oil tank.