Oil Leak By kountryguy (Read 2,474 times)

[mike6736]

Synthetic oil in my Magnum 300 did the same thing. I changed it back to Valvoline 20-40 and have never had a problem. I do use the gear oil and it is ok in the trransmission.

Magoo

[sprocket]

Gasket: www.partsforscooters.com/Cam_chain_gasket_164-87_gy6?sc=2&category=124357

I just use red silicon...works better, apply it evenly, let it set for an hour and then assemble

[petrol42]

I had the same problem as you.

It would drive me nuts because no matter what I did, the oil leak would mysteriously reappear. It wasn't until I decided to rebuild my top end that I discovered the crack on the side of the cylinder head.

The worse part was that I didn't discover the problem until I had my engine all put back together because I only replaced the cylinder jug and piston at first. I tried to put some JB weld on the outside of the engine where the crack was because I didn't know the extent of the crack inside the cylinder head. I put the engine back on my scoot but the oil leak reappeared so I ripped my motor apart again and the crack that's in the pic is what I discovered. I had to order another cylinder head and install that.

I hope this isn't the case with your motor but I wouldn't rule a thing like this out since the symptoms that you described is the same condition I had before I discovered the crack.

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