1991 Mazda B2200 Valve Cover Oil Leak

2012 MAZDA TRUCK
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LEXMARK
  • MEMBER
  • 4 POSTS
the problem with this pick-up is that is throwing oil out the valve cover,i replace the piston rings and cleaned everything ,but it still doing it ,it looks like if there was presure building up in the valve cover,it threw out almost all the oil the last time,after replacing the piston rings with new ones, it does it ,but less. someone told me that it could be the engine block,but i still think its the valves that are not closing rigth,but would like someone to help me ,dont want to spend money if i dont have to. thanks and i apreciate your help. :D
Oct 1, 2006 at 7:19 AM
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CATCH_15
  • ✓Experienced Mechanic
  • 250 POSTS
Did you put new valve cover gaskets on?
Oct 24, 2006 at 5:33 AM
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COSMO
  • ✓Experienced Mechanic
  • 347 POSTS
Sounds like you might have a valve train issue by the way you talking. Were the valve guides checked when you had the motor dis-assembled?

Also have you made sure that you PCV system is working properly?

And did you replace the valve cover gasket and bolt seals?

Cosmo....Mazda Tech
Oct 24, 2006 at 2:45 PM

Suggested Repair

Inspect the PCV system for blockage, replace the valve cover gasket and bolt seals if not already done, and have the valve guides and valve train checked for wear that could cause crankcase pressure and oil blow-by.

Conversation Summary

The owner of a 1991 Mazda B2200 reports oil being forced out of the valve cover, suggesting pressure buildup. New piston rings reduced but did not stop the problem. Experts asked whether the valve cover gasket and bolt seals were replaced, whether the valve guides were checked during disassembly, and whether the PCV system is working properly.

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