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CJ-7 80 vs 81
Anyone know the difference between 80 and 81, 258 motor around the intake
manifold / head area? I have seen a few parts like valve covers and Offenhouser intakes that list 81-86 year models. The 76-80 years must have a different head? -- JimG 80' CJ-7 258 CID, HEI 4.56 Gears, Lock-Right F&R 35" BFG MT on 15x10 Centerlines D44 Rear, D30 Front. SOA Dana 300 w/4:1 & Currie twin sticks Warn X8000i w/ dual batteries 00' TJ Sport 4.0L, 5sp 4.56 Gears, TrueTrac rear 33" BFG AT on 15x8 Eagle Alloys D35 Rear, D30 Front. 3" Suspension Lift |
Re: CJ-7 80 vs 81
Somewhere in there they changed the head bolt size and I 'think' the 81
to 86 has the valve cover that bolts down to the head. The older heads like I in now have no bolt holes for the valve cover, it is only held on with two center bolts to the rocker bridges. They also went from a 1 bbl carb and intake to a 2 bbl one somewhere right around that time. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift |
Re: CJ-7 80 vs 81
Somewhere in there they changed the head bolt size and I 'think' the 81
to 86 has the valve cover that bolts down to the head. The older heads like I in now have no bolt holes for the valve cover, it is only held on with two center bolts to the rocker bridges. They also went from a 1 bbl carb and intake to a 2 bbl one somewhere right around that time. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift |
Re: CJ-7 80 vs 81
Somewhere in there they changed the head bolt size and I 'think' the 81
to 86 has the valve cover that bolts down to the head. The older heads like I in now have no bolt holes for the valve cover, it is only held on with two center bolts to the rocker bridges. They also went from a 1 bbl carb and intake to a 2 bbl one somewhere right around that time. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift |
Re: CJ-7 80 vs 81
IIRC, there were quite a few changes between 82 and 83. Two that I
know about are the change to a plastic valve cover and removal of the belt driven air pump. 83's came with a 2 bbl Carter carb (don't know about other years). |
Re: CJ-7 80 vs 81
IIRC, there were quite a few changes between 82 and 83. Two that I
know about are the change to a plastic valve cover and removal of the belt driven air pump. 83's came with a 2 bbl Carter carb (don't know about other years). |
Re: CJ-7 80 vs 81
IIRC, there were quite a few changes between 82 and 83. Two that I
know about are the change to a plastic valve cover and removal of the belt driven air pump. 83's came with a 2 bbl Carter carb (don't know about other years). |
Re: CJ-7 80 vs 81
I have an '81. If you want to talk about what you have, I'll either confirm
or deny that mine is the same. I did have a belt driven smog pump and a 2bbl carburator. (These were replaced in favor of the Mopar MPFI Kit.) I have a steel valve cover with screws around the edge to hold it on. The intake manifold had a heater in it that didn't work. What else? "JimG" <JimG@nospam.com> wrote in message news:Yw2Pd.288$6p7.113@news01.roc.ny... > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift > > |
Re: CJ-7 80 vs 81
I have an '81. If you want to talk about what you have, I'll either confirm
or deny that mine is the same. I did have a belt driven smog pump and a 2bbl carburator. (These were replaced in favor of the Mopar MPFI Kit.) I have a steel valve cover with screws around the edge to hold it on. The intake manifold had a heater in it that didn't work. What else? "JimG" <JimG@nospam.com> wrote in message news:Yw2Pd.288$6p7.113@news01.roc.ny... > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift > > |
Re: CJ-7 80 vs 81
I have an '81. If you want to talk about what you have, I'll either confirm
or deny that mine is the same. I did have a belt driven smog pump and a 2bbl carburator. (These were replaced in favor of the Mopar MPFI Kit.) I have a steel valve cover with screws around the edge to hold it on. The intake manifold had a heater in it that didn't work. What else? "JimG" <JimG@nospam.com> wrote in message news:Yw2Pd.288$6p7.113@news01.roc.ny... > Anyone know the difference between 80 and 81, 258 motor around the intake > manifold / head area? I have seen a few parts like valve covers and > Offenhouser intakes that list 81-86 year models. The 76-80 years must have > a different head? > > -- > JimG > 80' CJ-7 258 CID, HEI > 4.56 Gears, Lock-Right F&R > 35" BFG MT on 15x10 Centerlines > D44 Rear, D30 Front. SOA > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > 00' TJ Sport 4.0L, 5sp > 4.56 Gears, TrueTrac rear > 33" BFG AT on 15x8 Eagle Alloys > D35 Rear, D30 Front. 3" Suspension Lift > > |
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