How does i know if my car is an J2?
#1
How does i know if my car is an J2?
Hi! Have just bought my dreamcar. It's an 1957 Oldsmobile 98. The car has threepack but how do i know if the car is original with this J2 option? I have searched the internet for some info but cant find anything.
I really hope that i can get the info here. Sorry for my bad english but im from Sweden.
Best Regards/ Fredrik.
I really hope that i can get the info here. Sorry for my bad english but im from Sweden.
Best Regards/ Fredrik.
#3
Hi! Have just bought my dreamcar. It's an 1957 Oldsmobile 98. The car has threepack but how do i know if the car is original with this J2 option? I have searched the internet for some info but cant find anything.
I really hope that i can get the info here. Sorry for my bad english but im from Sweden.
Best Regards/ Fredrik.
I really hope that i can get the info here. Sorry for my bad english but im from Sweden.
Best Regards/ Fredrik.
There is (as far as I know) nothing on the car itself , besides the engine, that would have identified the car as having the J-2 option.
There is no way to prove (or disprove) that the car was originally ordered with J-2.
Over the years I have seen many 57 Oldsmobiles under the hood. I would say that a majority of the 98's were equipped with J-2, so yours is most likely original.
BTW your English is better than some of the Americans on this forum.
The only way to positively prove (or disprove) it's a J-2 would be to get a copy of the original sales invoice.
Last edited by Charlie Jones; October 8th, 2014 at 08:57 PM.
#4
#6
I said it was "most likely" a J-2 , based on my years of observing 57 Oldsmobiles.
I worked as an auto mechanic from 1966 to 1985, with a 4 year haiatus when I served in the Air Force .
I would say that the majority (but not all) 1957 Ninety Eights were equipped with J-2. It seems to me that there were two places that I would encounter J-2 tri carb systems most often;
1. Ninety Eights, especially loaded ones .
2. Plain Jane 88 post 2 doors, often with a standard shift.
As I said before, the only way to prove (or disprove) that a 57 Olds is a J-2 would be to find an original sales invoice ( which some dealers archived). Or the window sticker ( which a few original owners soaked, peeled off, and kept).
All factory individual production records were destroyed many years ago.
Last edited by Charlie Jones; October 9th, 2014 at 07:28 PM.
#8
It seems to me that Olds was pushing their dealers and salesman to try to sell as many J-2's as possible in 1957. In particular to their well-heeled 98 customers.
This led to their un-doing. A lot of the 98 customers could be discribed as someone's Grandma or Grandpa. They NEVER stepped on the throttle hard enough to engage the end carbs. As a consequence, the gas in the end carbs would go stale and turn to gum and varnish. This led to problems with needles/seats and floats.
1958 was a recession year, and everything changed . Oldsmobiles were hard to sell. And fancy options , like the gas thirsty J-2, even harder . The 1958 figures don't superise me .
Also in 1958, probably because it was a recession year, Olds offered a super cheepie Dynamic 88 that had a single 2 barrel. The intake manifold for this model was none other than the J-2. It had 2 small metal plates over where the end carbs would have been.
This may be one of the reasons that there are so many "J-2's" still around.
#11
I just noticed something.
The valve covers have "dimples" in them.
These were used on J-2R engines.
There were two versions of the J-2 engines in 1957. The J-2 and the J2R. The J-2 was rated at 312 HP and was the one sold to John & Jane Public. The J-2R was also rated at the same 312 HP but was rumored to have been closer to 375 to 400 HP, The biggest difference was that the J-2R had a much "hotter" camshaft with solid lifters. As a consequence it also required adjustable rocker arms. Special valve covers with the "dimples" were required to clear the adjustable rockers.
The J-2R motors were sold to NASCAR racers such as Lee Petty and others.
The valve covers have "dimples" in them.
These were used on J-2R engines.
There were two versions of the J-2 engines in 1957. The J-2 and the J2R. The J-2 was rated at 312 HP and was the one sold to John & Jane Public. The J-2R was also rated at the same 312 HP but was rumored to have been closer to 375 to 400 HP, The biggest difference was that the J-2R had a much "hotter" camshaft with solid lifters. As a consequence it also required adjustable rocker arms. Special valve covers with the "dimples" were required to clear the adjustable rockers.
The J-2R motors were sold to NASCAR racers such as Lee Petty and others.
Last edited by Charlie Jones; October 9th, 2014 at 08:47 PM.
#12
There's a discussion on J-2's over on the H.A.M.B.
http://www.jalopyjournal.com/forum/t...-motor.589134/
http://www.jalopyjournal.com/forum/t...-motor.589134/
#14
Original was vacuum but prone to problems if not set up correctly - many were converted to manual / progressive linkage to improve performance. I have a J2 setup from a '57 - original carbs and intake, but somewhere along the way it was set up with progressive linkage
#16
Cool info
I have seen the J2 intakes with blocked off fore and aft carb ports. I had heard that they just made SO MANY J2 intakes that they did that to use them up. Thus the low price of a J2 intake [have seen 'em for $50] compared to a rare L69 intake.
I have seen the J2 intakes with blocked off fore and aft carb ports. I had heard that they just made SO MANY J2 intakes that they did that to use them up. Thus the low price of a J2 intake [have seen 'em for $50] compared to a rare L69 intake.
#18
original J2 ?
I manufacture many reproduction J2 parts and know the units well. Looking at your pictures, I think this unit was added to your car because many of the correct hard to find parts are missing and the center carburetor is a 1958 unit. Many people buy cheap bare intakes and try to just add 3 Rochester 2 bbls. and try to fake the correct J2 unit.
#19
Olds1957 - You really do have a nice ride there, but I have one question. Where are the ninety-eight scripts that were on the sides of the front fenders and the trunk lid ? There should also be ninety-eight scripts on the lower front corners of the front door upholstery. Unless the Swedish export cars were different than the American cars. Regardless, I wish you many hours and years of fun driving your "girl".
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