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900 79-93 Clutch Seal for the input Shaft 8710881
900 79-94 Oil Drain Plug Swedish 8731762
900 79-90 Oil Drain Washer for engine 8718439
900 79-88 Solid Mount 8V Front Aft 9369307
900 79-88 Solid Mount 8V Passenger 9369315
900 79-94 Front Crank Seal Oil pump side 9173576
900 79-94 Rear Crankshaft Seal flywheel side 9175902
900 81-94 Oil Pump O-Ring 9125824
900 81-94 Oil Pickup O-Ring goes on oil feed pipe from pump 9146598
900 79-88 Distributor O-ring 8V Non-Turbo 9351750
900 81-94 Oil Filter Housing Gasket 7566433
900 79-88 Thermostat Housing Gasket 7566532
900 81-94 4 Cyl O-Ring Small Feed line to water pump 9146598

All of that costs a bit over $100.

+ I'll get a new water-pump, clutch and second-hand gearbox with a bit less than 100.000km on it.

After all the replacements, could I swap from mineral 15W-40 to fully synthetic engine oil without a fear of leak?

Thanks!


c900 Gls 8v n/a twin-carb 1983, 170.000km
 

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Because you are replacing all of your seals, you should have no leaks if you use synthetic engine oil.

As Matthew suggested, read the many posts in this Forum about the issue of changing from mineral oil to synthetic.

My personal opinion is that the higher cost of synthetic is only worthwhile if your car has a high-performance engine and you drive it hard. In our own cars (1988 16V, 423,000km and 1990 16V, 243,000km) I just use 5W-30 mineral oil--and change it every 8,000km.
 

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I'm doing tranny swap in the next couple of weeks and pretty much have the same list of parts as you that I'm going to replace. A couple of things I do have on my list that you don't are engine block to tranny gasket and shift rod seal. You might also want to consider a new timing chain and timing chain guide if yours are original. They aren't too expensive and much easier to replace with engine out.
 
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