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Mossberg

Member Since: 29 Feb 2020
Location: Lancs
Posts: 553

1993 Defender 90 300 Tdi HT Aintree Green

Seating the 300tdi crank shaft oil seal.

I fitted a timing belt to my 300tdi but it has started leaking oil from the wading plug hole in the timing cover. I assume the oil seal has gone in badly so need to do it again this weekend.

Could some of you experienced folk give me tips on the best method to seat them so as not to have this happen again.

I have the crank pulley that came off if this is any use to help seat it.

Thanks for your help.

Mick

10th Sep 2021 1:33pm

I Like Old Skool

Member Since: 23 Feb 2015
Location: Manchester
Posts: 828

1994 Defender 110 300 Tdi ST Coniston Green

Did you fit the o-ring between pulley and crankshaft?

11th Sep 2021 6:47am

Mossberg

Member Since: 29 Feb 2020
Location: Lancs
Posts: 553

Yes, o ring fitted.

11th Sep 2021 7:23am

Ohlins

Member Since: 20 Oct 2009
Location: French Pyrénées
Posts: 28

Good morning

I use three threaded bars screwed into the seal mounting engine block holes ( at 12 o'clock position and lower bottom left and right) and use this as a guide to slide the seal on so it arrives at a perpendicular angle to the crankshaft......the protection seal pops off ..........it also wouldn't do any harm to add silicon gasket seal........ It should be slid on dry also.

As an aside I wouldn't discount the leak coming from the camshaft seal also.

If high kms then if there's movement in the big end bearings the seal could leak too.

All the best

Army 110 3 Door 200tdi
Army 110 3 Door V8
Army Lightweight 2.25 Petrol
110 300tdi 5 door
Yamaha XT660Z Ténéré
Gas Gas 300EC Ohlins

18th Oct 2021 7:40am

I Like Old Skool

Member Since: 23 Feb 2015
Location: Manchester
Posts: 828

@Ohlins

Are you getting mixed up with the rear main seal? The front pulley/crank oil seal is just a round drift in type seal.

18th Oct 2021 10:11am

Ohlins

Member Since: 20 Oct 2009
Location: French Pyrénées
Posts: 28

Yes.......I'm a donkeyhead........

eeeeeee........or

I obviously need to order this............

Click image to enlarge

Army 110 3 Door 200tdi
Army 110 3 Door V8
Army Lightweight 2.25 Petrol
110 300tdi 5 door
Yamaha XT660Z Ténéré
Gas Gas 300EC Ohlins

19th Oct 2021 9:12am

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