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Hi

I am new MX5 owner and purchase my NB8a with some oil leaks.

I hoped a timing belt change, crank seal, cam seals, water pump and valve cover seals would solve these problems. I did this on Friday and have been for a few short drives since.
Whilst getting a wheel alignment this morning I heard one of the Aux belts squealing and thought that odd as I had carefully adjusted them.
When I opened the bonnet I noticed a couple of drops of oil on the plastic cover and then looked up the motor and noticed a fresh oil leak.
There was a small dribble of oil coming down the lower timing belt cover on the drivers side (where it joins the other half of the lower cover) and oil sitting on the top of the oil pan.

I was very careful with the orientation of the cam seal and tapped it in carefully with a pvc pipe of the same size.

As the oil is on top of the oil pan i am thinking it is leaking some where higher on the motor.
Can any one offer any suggestions of the likely source?
I can post some pictures tonight if that will help.

Cheers
Andy

Cam seals, front main or cam cover.

Just pull it apart and look

Dann

Thanks Dan

I will pull the covers off and check but I did replace the Cam seals x 2 and Crank seal.
I have checked the Valve cover and no oil coming from there.

Cheers
Andy

so pulled the timing belt covers off tonight and looks like it is the inlet cam seal that is leaking.

Now why?
How to solve?

Did you put it in properly?

From its inside or outside?

Is the cam worn on the sealing surface?

Dann

I will pull the cam cover off tomorrow night (it is no fun working in the open st night) and see if I can see where.
At the moment I am seeing this looking through the cam sproket.


This car had been leaking oil when purchased so suspect this may be an old problem with the Cam surface.

The seal inner lip can be fitted so that it is folded.

Are you sure you didnt do this? is the leak coming from between the seal and the surrounds or the seal and the cam?

Dann

I will get up early in the morning and pull off the valve cover to check.

Dan, you know too much.. thank you.

Cam seal with folded lip...



Will get a new one today and refit .... with more care this time.

Wicked, easy fix

Dann

Seal changed and back together..

See how she goes on the weekend.