1986 Code '9' 307
#1
1986 Code '9' 307
When I bought my '86 442 brand new I remember the Service Manager saying now the HO 307 was a 'roller' motor. I understood 'roller' valvetrain was new in '86 but just read something recently that made me believe '86 was the ONLY year. Did every other year after that get the roller set up too or was it '86 only? Was it only the HO (Vin code '9') engines or all 307s? Hard to believe it would be a one year only offering.
#2
When I bought my '86 442 brand new I remember the Service Manager saying now the HO 307 was a 'roller' motor. I understood 'roller' valvetrain was new in '86 but just read something recently that made me believe '86 was the ONLY year. Did every other year after that get the roller set up too or was it '86 only? Was it only the HO (Vin code '9') engines or all 307s? Hard to believe it would be a one year only offering.
#3
Thanks Joe. I was not aware it was lifters only. Also I would assume the switch to 7A heads and 5A intake explains why the '86-'87 motors had 10 less horsepower but 10 more lb/ft of torque than the previous version. I wish I'd kept that car.
#4
Olds went completely backwards for performance with swirl port. When they introduced the Vin 9 in 83 it was very similar or had more power than other 5.0 HO's. Dropping compression and shrinking ports made it an embarrassment.
#5
You can thank the CAFE requirements and the decision to stick with a carb instead of moving to EFI for this.
#7
code 9
what exactly is meant by vin code 9? is this the code on the motor, or is this the Vin code on the car? and which place in the vin do we look for the number 9?
trying to dissect what my wagon is
thanks for the assist.
Bruce
trying to dissect what my wagon is
thanks for the assist.
Bruce
#8
?
I think its the eighth? digit in the Vehicle Identification Number located on the dash and on the title and probably the insurance paperwork. It refers to roller lifters instead of hydraulic lifters.
I think its the eighth? digit in the Vehicle Identification Number located on the dash and on the title and probably the insurance paperwork. It refers to roller lifters instead of hydraulic lifters.
#10
referrers to HO motor (9) vers. non HO motor (Y). roller lifters across both motors in 86
#11
The eighth character in your car's VIN is the engine code. For 1986, Olds used two different 307 motors, the "Y" code 140 HP version and the "9" code 180 HP version. Don''t worry about this, your wagon has the VIN Y motor. Only 442s got the VIN 9 motor that year.
Thread
Thread Starter
Forum
Replies
Last Post