7.3 l heads
Posting Guru
Joined: Feb 2001
Posts: 1,465
Likes: 2
From: Indianapolis
7.3 l heads
All 7.3L heads are the same. All 6.9L heads are the same except the first year (1983) which have a different pre-combustion chamber. The difference between 6.9L and 7.3L (except for the afore mentioned 1983 pre-chambers) are the head bolt holes. The 6.9L had 7/16 inch head bolts and the 7.3 had 1/2 inch bolts.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Precombustion chamber volume -
6.9 = 18.34 cm3
7.3 = 20.42 cm3 (increased only for emissions certs)
Precombusion chamber inserts are physically interchangable, however the throat has been redesigned to distinguish them apart, and the 7.3 prechamber cup has an embossed "88" on it.
6.9 = 18.34 cm3
7.3 = 20.42 cm3 (increased only for emissions certs)
Precombusion chamber inserts are physically interchangable, however the throat has been redesigned to distinguish them apart, and the 7.3 prechamber cup has an embossed "88" on it.
