Maybe I'm being too **** about this but it never hurts to ask. I'm putting everything back together after a head gasket repair. The felpro gasket kit I got (the ~$180 kit with all the top end gaskets) came with a set of 16 o-rings for the fuel injectors. The ones currently on my fuel injectors are probably original and seem a bit dry so they should be replaced. My boggle is that the haynes manual says to only use brown o-rings on the bottom of the fuel injectors. The old ones on there now are brown. However the 16 that came with the kit I have are all black. Does this matter? I would imagine fel-pro knows what they're doing, just wanted to make sure.

Also - When you put the new o-rings on should they be lubed with anything?

Thanks!

 

It shouldn't matter felpro only has one number. I have used both the fel pro number es70599 and the standard motor products number sk1 with no problems. The new injectors from standard have black felpro orings on both inlet and outlet. If you can get your hands on some sil glyde grease I would use that.

 

Yup I used the same felpro kit. Used some silicone spray to lube the orings up and they slid right in.

 

I simply used engine oil on the o-rings and intake manifold bores.....went right in no issue.

 

You really shouldn't use silicone based spray lubes on fuel system rubber components. Just use petroleum based lubes...engine oil, petroleum jelly.... and you'll be fine.

Silicones have reactive components that can react with rubber....

 

exactly

i use assembly lube, for just about everything