under plenum?

[roadster]

Is it normal to have carbon deposits on injectorhousing walls?
Where does it come from

 

[White 68]

If you talking about outside the injector housing walls No" Its most likely a leaking crankcase gasket or the rubber oil vent tubes ....

 

[roadster]

Yes my crankcase box bolts were a bit loose, but why the deposits on 5 .7 cylinder injector housing walls? could it be gasket on housing?
How would a leaking crankcase box effect engine operation?
thanks

 

[Jeffvette]

Is it carbon, or grease/dirt mixture?

 

[roadster]

Seems to be a mixture of all three...

 

[ZR1 MK]

Is it carbon, or grease/dirt mixture?

Looks like oil vapor residue from crankcase cover. Dirt will stick to this over time. Loose bolts seem to confirm this. Leaking injector gasket will give a red color (depending on fuel color used) that will not collect dirt as pictured.
Mike

 

[roadster]

Ok thanks guys
I´ll just tighten the breathr cover & vent tubes

 

[White 68]

Ok thanks guys
I´ll just tighten the breathr cover & vent tubes

Make sure you locate tite them and torque to specs ....10N.m or 89lb.in.... Depending on how bad the gasket is your already in there you should just replace the gasket and clean out the valley ....

 

[phrogs]

Depending on how bad the gasket is your already in there you should just replace the gasket and clean out the valley ....

Yep while you have it apart I would remove everything from the top of the motor and clean clean clean!

If you simply tighten the bolts down your still going to have leaks, it was a common thing from the factory that these were loose, I striped my whole top end and cleaned up all the oil leaks, replaced the gasket and locktight and torqued the bolts on the breather.

thats your best bet IMHO anyway its fun to get in there and make it look perdy!

If you need some pointers feel free to email me