Residue in intake

Slonopotam

NAXJA Member #1358

american_zero

New member
To an extent, oily residue in the intake is normal. It's caused by the PCV that is routed into the air intake. This is the same stuff that you may notice dirtying up the air filter. It probably doesn't matter too much if you clean it or not, but I always clean intakes when I pull them. Might just be a little OCD, but I like to clean things while I have them apart. A degreaser should work fine, just try to find something not caustic to aluminum. It's does not have to be really strong to clean that up - also use a brush to help remove it.
 

dobesrgrt

New member
To an extent, oily residue in the intake is normal. It's caused by the PCV that is routed into the air intake. This is the same stuff that you may notice dirtying up the air filter. It probably doesn't matter too much if you clean it or not, but I always clean intakes when I pull them. Might just be a little OCD, but I like to clean things while I have them apart. A degreaser should work fine, just try to find something not caustic to aluminum. It's does not have to be really strong to clean that up - also use a brush to help remove it.
I think he is talking about the intake and exhaust ports on the head, not the intake itself.

Did you look at the pics. ?
 

Wayne Sihler

NAXJA Member
NAXJA Member
Well the valve stems look clean,no build up on the back side of the head.I would just wipe the intake ports out with a rag soaked with some carb cleaner and call it good.
 
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