spark plug torque spec for 3.9

[SnakeBit!]

anybody know..is it the 11-15 ft lb. range? thanx.

 

[ttocs]

stock heads?

 

[SnakeBit!]

Yes. thanx.

 

[SnakeBit!]

I am assuming they are aluminum heads....son's car. coming home this next week and want to tune it up.

 

[ttocs]

stock aluminum heads?

 

[SnakeBit!]

whatever stock heads are...don't know till I see them again.

 

[SnakeBit!]

did they come with both?

 

[ttocs]

ya know I didn't notice this was in the v6 section till after I asked. I do not know what the stock v6 heads are made of for sure but I was assuming they were not aluminum. Aluminum heads are normally an upgrade and it can change the torq specs on the spark plugs.

 

[SnakeBit!]

thanks, yea, that is why I was asking since on line I have seen two different specs for the car. so anybody?

 

[07GtS197]

My haynes manual says 7-14 ft lbs but thats a pretty big gap.

And yes the 3.8/3.9 has aluminum heads stock. If Im not mistaken theyve always had aluminum heads.

 

[SnakeBit!]

Thanks!!! pretty much the same as the 4.6 then. one of the ones I had read I think said 5-14. even a bigger gap. one said 25 which to me was high for aluminum heads.

 

[ttocs]

I don't think I have seen much above 15-20 ft lbs for aluminum.

 

[07GtS197]

Same but it depends how many threads they have too. Id set it at about 13 ft lbs and retorque them after a few heat cycles.

 

[SnakeBit!]

just had someone on a different site indicate that AllData lists it as 11 ft lbs.