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2008 Trailblazer 4.2LS
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5 Posts
You've got those oil leaks because you have pressure in the crankcase.

Solve THAT and you might cure all your oil leaks.
I too have similar seepage, changed PCV hose on driver side (GM #12575660 ) after cleaning with carburetor cleaners, Mechanic could push compressed air from driver side vent, still have high oil consumption.

Last week fixed vacuum leak on break booster.
 

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Registered
2008 Trailblazer 4.2LS
Joined
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5 Posts
you can try to look in the spark plug wells and see if there is oil in them or you may see oil on the sides of the block. those things indicate a valve cover gasket mating issue. oil dripping from the drain plug may indicate a stripped pan or plug or leaky oil pan gasket. oil on the filter points to a poor seal on the filter. blue smoke at cold start is a sign of weak rings on the pistons.
Thanks for the suggestion, will check with the mechanic on spark plug leakages.

In my country (Saudi Arabia) mechanics doesn't want to spend time on high mileage vehicles. The vehicle is giving good mileage 22MPG Highway and 14-15MPG City and their advise to add 1-2 ltr oil each month rather fix engine issue as spare parts not readily available. They are ready to fix minor maintenances which keep the vehicle moving.

The forum helped lot in resolve outstanding issue on Thermostat, PCV , vacuum leaks.
 
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