Engine oil viscosity

[Raul]

Hi

About 50000 miles back I changed the clutch of my car( berlingo 2,0 hdi). Lately I noticed that the clutch has started to slip. When I changed the engine oil last time I noticed that the sump was a little bit oily near the area where gearbox meets the engine. I did not change the crankshaft oil seal when I did the clutch. I have started to use 5w30w engine oil about 15000 back from now and I started to think could it be that the low viscosity engine oil is the reason why the crankshaft seal started to leak. I am going to do the clutch job again and this time I will also change the crank seal but should I also change the engine oil for a higher viscosity( for example 10w40w ) or is it only about the bad seal.

[Steve Walsh]

If the seal is leaking, It will leak with whatever engine oil you put in. And if you are changing a clutch it is not much more work to do at same time

[Raul]

If the seal is leaking, It will leak with whatever engine oil you put in. And if you are changing a clutch it is not much more work to do at same time

Can I continue to use the 5w30w if I change the oil seal? It is a high quality oil and I just made the oil change.

[GiveMeABreak]

For your engine (DW10TD in Estonia, the following are Citroen recommended:

5W30 Oil (B71 2297) TOTAL QUARTZ INEO HTC 5W30
5W40 Oil (B71 2296) TOTAL ACTIVA 9000 5W40, TOTAL ACTIVA DIESEL 9000 5W40, TOTAL QUARTZ 9000 5W40
10W40 Oil (B71 2300) TOTAL ACTIVA 7000 10W40, TOTAL QUARTZ 7000 10W40, TOTAL ACTIVA DIESEL 7000 10W40, TOTAL QUARTZ DIESEL 7000 10W40

[Raul]

For your engine (DW10TD in Estonia, the following are Citroen recommended:

5W30 Oil (B71 2297) TOTAL QUARTZ INEO HTC 5W30

Thanks. Looks like I can continue with the currently used oil.

Which type of crankshaft oil seal would you use. An original which has a spring loaded lip seal or some newer type of seals which are without the spring. Also, what about the crankshaft to flywheel bolts. Should they be renewed and used with a loctite.