Thread: Dust seal 300TDi timing cover

Hi Ben, googling shows these images of a new timing case with the metal cased seal fitted

ERR7146.JPG
err7146seal.jpg
Also looking at schematic in diagrams, it shows the timing cover then behind it the dust seal, so I would assume the seal is fitted from the behind face of the timing cover using the metal face to push it in so that the rubber face is on the front face of the cover. Having said that though I have never fitted one myself
Cheers, Mario

Hi Mario,

Good idea looking up images of the later style timing cover!
I can see that the rubber ring sticks out the front of the case - presumably to press against the crank shaft pulley. I will install it flush with the back of the cover.

Thanks!

Hopefully this vid helps a little too:

Changing the cambelt on a Land Rover Discovery 300 TDI (HD) - YouTube

at about 7:40 they do the timing cover dust seal(if it doesn't link to that point)

Did you do the cam belt change?
Or are you replacing seal due to a leak or something?

Hey,

Yep i am doing the timing belt and whilst i have the cover off I am doing the font main oil seal, fan bearing, A/C idler pulley and front dust seal for good measure.

I just hope i can get the front main oil seal out now and reinstall it - without taking out the rear timing cover...?

I wpuld ise the err4576 rubber dust seal personally. I have several times come across the new thicker 1 piece crank pulley rubbing on the steel dust seal. You can fit the early err4576 seal in its place to clear the pulley. The front crank seal err4575 can be hooked out but do not damage the seal bore. To refit the seal ise the old crank pulley reversed, and tap it over the crank as a guide to insert the seal dead square.

Jc

Do you mean the timing belt crank pulley rubbing on the back of the metal dust seal?
If i make sure it is flush with the back of the cover (perhaps a fraction of a mm recessed) surely it wont rub?
In any event the metal seal and the crank pulley should both be turning in unison - not one rubbing on the other - as the inner metal dust jacket spins with the crank...
Thanks

The timing belt pulley was scuffing against the steel shell of the seal. I just removed the cover and fitted an earlier rubber seal.
Like i said only happened a few times out of all the literally hundreds i have done over the years.

Could a kind soul confirm where the O-ring goes that lives behind the timing belt crank pulley...

Does it just sit on the crank and the crank pulley presses up against it? Does that mean that when i put the front harmonic balancer on that it presses up against the timing pulley which in turn presses against the o-ring?

I have found a parts diagram of the o-ring in another thread but it just shows the o-ring hovering in mid air behind the timing belt crank pulley...