I just took apart a used engine I bought to refresh it, and I just realized the housings are not the same. One of them has a little hole on top of the Trailing plug, and the plugs are more far apart.

Won't this affect timing?

 

Crazy....

I dunno what that could effectively do...

 

Me neither, but I don't think it's a good idea to rebuild this motor with tow different housings.

Anyone?

 

The little hole might be for a knock sensor. And theoretically it could affect timing. The leadings fire together, so if they are not spaced exact it will throw off timing.

 

That's what I thought. To bad I did'nt realize it till after I polished them. I guess I'll have a polished housing for sale soon unless we're both wrong.

 

wow nice work. did you polish your self? are you selling that front cover too?

 

That is for the knock sensor, now my 88 13Bt engine had one, and so the 91 13BT, could that be a NA housing?

 

I took it to some guy $50. The front cover is for my engine.

 

I wouldnt purpose build one that way, but it would run and shouldn't ever have a problem unless you're trying for mega hp. However, if you'll lose sleep over it, now's the time to take care of that.

 

I'm looking for 350whp

You have a housing you wana trade kevin?

 

No, dont really have a need for a single polished housing, considering I dont have a local polisher

 

Off to ebay then.

Thanks for the input though.


BTW Kevin, can you tell what year the housing are by looking at the pic NA/Turbo?

 

housing with hole for knock sensor would be S5 TII
other one would be S4 TII if it has TII exhaust port