Forum - Briggs & Stratton Racing
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cmcgonag

Registered: 05/12
Posts: 2
Reply with quote  #1 
I am getting my WF ready to sell after letting it sit for a while. I have a pretty major oil leak. Seem to be coming from the head gasket underneath all the plastic/metal covers. I remember a bunch of guys at the track having a similar leak. Just curious if any one else has seen this or not and curious if I need to change the head gasket.

Thanks,

Colin
briggsracing

Moderator
Registered: 05/16/11
Posts: 61
Reply with quote  #2 
Colin, If the engine has been sitting It wouldn't be coming from the head gasket area because the oil level doesn't reach this level.  Sitting I would have to guess side cover seal or gasket.  Depending on the oil you had in it, if it was a karting oil, you likely have a rusty mess in the crankcase.  Karting oils are typically PAG based, attract water and combined with the by-product of combustion creates a mild acid.  You might have a side cover seal failure from the acid over time.


cmcgonag

Registered: 05/12
Posts: 2
Reply with quote  #3 
No it doesnt leak when sitting. It leaks when running....it did leak (when running) when I put it into storage but now it does a whole lot more.
briggsracing

Moderator
Registered: 05/16/11
Posts: 61
Reply with quote  #4 
CMC,
       My suggestion would be to clean it up, isolate where the oil is coming from.  If it is the head gasket it would be a straight forward change out unless something else lead to that situation.  A head bolt might have losened up with heat or too much heat (running lean) could have warped your head some.  If it is the head gasket pull the head, inspect the cylinder head gasket surface for flatness before replacing.  A complete list of torque specs, which are VERY important to follow, are available under the WF section.
FasterMotorsFasterMotors

Registered: 06/15/11
Posts: 56
Reply with quote  #5 
The most common leak in this area is from tightening the valve cover bolts too tight. Specifically the bottom valve cover bolt.
The valve cover gasket can be damaged or the gasket between the plate the valve cover is bolted to and the head gets damaged.
The valve cover gasket is easy to inspect but the other gasket is a bit more challenging. 


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