Georgia Fiero Club Forum

All Things Fiero => General Fiero Discussion => Topic started by: pgackerman on December 03, 2020, 12:27:03 pm

Title: How can I tell if it's a 3.4L?
Post by: pgackerman on December 03, 2020, 12:27:03 pm

Subject says it all.  How can I tell if a 3.4L has been swapped in if the original 2.8L upper plenum is used?

Title: Re: How can I tell if it's a 3.4L?
Post by: Fierofool on December 03, 2020, 02:04:43 pm

93 thru 95 red engines have an F cast into the block near the rear freeze plugs.  It will have a knock sensor port on the trunk side of the block, midway.  It will have starter mounting holes on the trunk side starter boss ar the bell housing.  The starter as mounted in the Fiero will not be fully supported on the forward mounting bolt flange. 

I don't know the casting ID for the red 3400 but it should also have the knock sensor port and the starter will be fully supported at both mounting bolts.  No starter mount holes on the trunk side.

Check the newsletters for the engine listings previously published for 3400 rwd  ID casting.