I have an 88 T2 with around 35,000 miles on a rebuilt engine. I am replacing my oil metering lines and was wondering if the oil injectors themselves should be replaced. Do these fail often? Are they a type of check valve? Is there any way to give them a good cleaning? Thanks!

 

I have an 88 T2 with around 35,000 miles on a rebuilt engine. I am replacing my oil metering lines and was wondering if the oil injectors themselves should be replaced. Do these fail often? Are they a type of check valve? Is there any way to give them a good cleaning? Thanks!

as long as they are not blocked i cant see how they will need replacement. the inectors themselves have a small specificly sized hole for oil to pass through. an oil inlet into the injector, and an air inlet at the top. as for failing there is nothing really that can fail, exept for blockages as previously stated. nil check valve.

as for cleaning, i clean mine in prepsol and back flow them (blow back through the injector) with shop air or at worst your mount.

hope this helps

matt

 

If you removed them don't forget they have TWO washers.

 

They have a rubber, poppet like checkvalve inside to keep air from flowing from the rotor back to the spider/throttle body. The FSM shows how to check out the check valve

To quote from the free, online Training manual: "The oil nozzle has a one way check valve which acts as all air bleed to prevent excessive suction or oil and to atomize the oil".

"When vacuum is created in the combustion chamber and intake manifold during the suction period, the check valve is pulled open, and allows air to mix with oil.

During the compression period, pressure is applied and the valve closes to prevent backflow of the oil into the connecting hose."

 

I've never seen one of these so bad that it needed replacement. Often, a little compressed air, carb cleaner and brake cleaner will clean them right out.

 

Thanks for the help everyone. I am glad cleaning them will do the trick as replacing all four is not a cheap option.