Spark plug condition.

[07GTS]

@07GTS if OP has stock L77 he doesn't have the valley breather, the AFM Valley cover doesn't have one.

in this case the rocker vent on bank 1 is dirty air I believe?

aah ok i thought they might have had one at the rear, which ever one causes the oil to go thru, it should be restricted so u dont such full vacuum which is good so prob best to use, the front rocker breather might be full flow and u dont want vacuum to that one

 

[07GTS]

How old are the TR6 plugs?

I change out my TR6's out every 5k Km for peace of mind, basically every oil change it gets new plugs

yea same its like whats 50 bucks every 6-12 months

 

[dassaur]

aah ok i thought they might have had one at the rear, which ever one causes the oil to go thru, it should be restricted so u dont such full vacuum which is good so prob best to use, the front rocker breather might be full flow and u dont want vacuum to that one

Nah no orifice at back. It's bank 1 rocker which are usually capped off for non afm

 

[07GTS]

Nah no orifice at back. It's bank 1 rocker which are usually capped off for non afm

that one sitting straight up at the rear cover bank 1 ? and they dont have the bank 2 vent ?

 

[dassaur]

that one sitting straight up at the rear cover bank 1 ? and they dont have the bank 2 vent ?

Yep that's the one. I thought you meant at back of valley plate.
They do have bank 2 vent. The 1 difference is no valley plate orifice.