Reply To: Jetfire block vs f85/cutlass block

Home Page Forums Discussion Topics – Ask the Experts Jetfire block vs f85/cutlass block Reply To: Jetfire block vs f85/cutlass block

#13332
JimNoel
Participant

The Jetfire block is different than a 215 used in any other body style. The main bearing cap bolt holes were drilled and threaded 9/32″ deeper. The main bearing cap bolts are 9/32″ longer and have 12 point heads. The pistons used were only used in ’62 & ’63 Jetfire’s and ’63 4bbl carb cars. The main bearings were “Marine-400” bearings and were unique to the Jetfire cars. The heads and valves were different too, but you only asked about the block. You can make a Jetfire block from a non-Jetfire block by drilling the main cap bolt holes deeper and threading them to fit the longer Jetfire bolts. Functionally, it will work, but as Eric states, the block identification will be incorrect. Just depends on what outcome you want?

Recent Articles

Turbo System Safety Checks

Turbo System Safety Checks

The safety components of the factory designed turbo system have some interactive groups of safety "c...(read article)

Engine Front Drive Pulleys

Engine Front Drive Pulleys

The standard drive pulley has one groove. It drives the water pump/fan and alternator or generator. ...(read article)

1961-1963 F85 Car and Option Prices

1961-1963 F85 Car and Option Prices

Attached to this article is PDF file containing an extensive list of car and option pricing for 1961...(read article)

Recently Active Members

Profile picture of hausdok
Profile picture of joe_padavano
Profile picture of jensenracing77
Profile picture of akatsilometes
Profile picture of nonhog

OldsJetfire Forum