wrdabney
Forum Newbie
Posts: 3
Reg: 07-30-12
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07-30-12 10:43 AM - Post#2253725
I posted this here because I have a '55 235 in my '49 Bel Air. Does anyone have a good picture or illustration of how the throttle linkage should hook up. I may be missing a part but I can't get it to work right. Any suggestions?
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 drtyler
"4th Year" Silver Supporting Member
Posts: 119
Loc: Atlanta, Georgia
Reg: 05-06-10
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07-30-12 10:50 AM - Post#2253731
In response to wrdabney
http://chevy.oldcarmanualproject.com/1929_57chevyp...
http://chevy.oldcarmanualproject.com/1929_57chevyp...
Second link shows for powerglide cars, but the accelerator to carb linkage should be similar (I think).
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wrdabney
Forum Newbie
Posts: 3
Reg: 07-30-12
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07-30-12 10:59 AM - Post#2253734
In response to drtyler
Thanks Tyler. I forgot to mention that it is a stick shift.
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 rj_ly
"6th Year" Gold Supporting Member & Tri-5 Calendar Creator
Posts: 17553
Loc: Southwestern OH
Reg: 11-15-02
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07-30-12 01:42 PM - Post#2253809
In response to drtyler
Carburator to bellcrank, bellcrank to gas pedal is the same on standard shift vehicles.
At least the one on my (windowed) Delivery is likethe diagram.
57 Hrdtp(mine for 40 YEARS JULY 12)
57 210 4-dr Sdn(37 yrs Aug 12)
57 Hrdtp(32 yrs Jan 12)
57(windowed)S. Delivery(31 yrs Oct 12)
57 150 Wgn(24 yrs Mar 12)
57 210 2-dr Sdn(8 yrs Oct 12) |
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 kensluys
"7th Year" Silver Supporting Member
Posts: 561
Loc: Bellingham, WA, USA
Reg: 04-18-01
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07-30-12 05:41 PM - Post#2253922
In response to rj_ly
I have to ask.... Is this actually a 1949 BelAir?
The stock accelerator hookup on the 1949 - 1952 cars is different than the diagram that was linked to in the earlier posting. I recently went through this with my car, and found it very frustrating to find any pictures or diagrams.
For the 1949 - 1952, the accelerator rod from the socket on the back of the gas pedal goes all the way to a bell crank on the engine. And it connects to the top arm on that bell crank. From that bell crank, another rod fastens to the bottom arm and goes up to the carburetor. This bellcrank is very difficult to photograph well (or mess with the connections), as it is up behind the exhaust manifold. There was a posting a while back about interference between the exhaust manifold bolts and the accelerator rod, which included a great picture of this area. But I can't locate that now. Anyway, pushing down on the gas pedal pushes the top bell crank arm forward.
In 1953 and later (I think), the linkage is as shown in the link in the above posting. The rod from the socket on the back of the gas pedal goes to a bell crank mounted on the underside of the toe panel. It connects to the bottom arm on that bellcrank. Then another rod goes from the top arm of that bellcrank over to a bellcrank on the engine, and fastens to the top arm on the engine bell crank. With the extra bell crank in there, pushing down on the gas pedal pulls the arm back on the engine bellcrank. So the bell cranks are different. To make it work correctly, the mounting point on the engine for these later linkages' bellcranks is about 3 1/2" farther toward the rear of the engine block than on the earlier engines. So using the stock 1949-52 accelerator linkages and bell crank on an engine block with the later mounting location is a problem. The geometry is screwed up and they won't just "fall into" place. And to get them to work by custom fabricating some other rods was just a bit beyond me.
Some engines seem to have the bosses for both bellcrank locations. I don't know which ones, but I got lucky with mine and it does have them both. It is a replacement engine for 1958 - 62.
I had been trying to connect the engine bellcrank to the wrong boss, and couldn't get the linkages to work. The correct boss had a short machine bolt threaded into it, which made me think that it was for something else. But I did some measuring on a 235 from a 1951, and finally realized the problem. When I moved the bellcrank to the correct location it all hooked up just fine.
The engine bellcrank for the 1949 - 52's is mounted about 12 1/2" from the rear of the engine block. For the later engines their bellcranks are mounted about 9" from the rear of the engine block. In both cases, they are about 6" up from the oil pan bolting flange.
| 1951 BelAir - Bought it in 1969, sold it in 1970, found it and bought it again in 1999. |
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wrdabney
Forum Newbie
Posts: 3
Reg: 07-30-12
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08-03-12 12:42 PM - Post#2255381
In response to kensluys
I'm still struggling getting this right. Can anyone post some pics of how this is supposed to hook up? It would be greatly appreciated.
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70fierro
Member
Posts: 542
Loc: san diego, ca
Reg: 09-20-05
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08-03-12 01:45 PM - Post#2255402
In response to wrdabney
hopefully these 2 links help. There are some pics posted. Cesar
http://www.chevytalk.org/fusionbb/showtopic.php?ti...
http://www.chevytalk.org/fusionbb/showtopic.php?ti...
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kensluys
"7th Year" Silver Supporting Member
Posts: 561
Loc: Bellingham, WA, USA
Reg: 04-18-01
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08-03-12 02:02 PM - Post#2255407
In response to wrdabney
I know my earlier post was confusing, and a picture is worth a thousand words. But I guess the net of it is:
If you are trying to hook up the stock accelerator rods to an engine that does not have the stock bell crank location, it won't work.
So, is the bell crank mounting location on the engine about 12 1/2" from the rear of the engine block, or is it about 9" from the rear of the block? If it is the "correct" 12 1/2", then the hookup will look like this:
You can see that the bellcrank mounting point is right behind the exhaust manifold. You can also see the other mounting point on this engine block, back another 3 1/2" toward the rear.
Here is a shot of the accelerator rod going back from the bellcrank and through the toe panel:
Another picture of the bellcrank on the engine:
| 1951 BelAir - Bought it in 1969, sold it in 1970, found it and bought it again in 1999. |
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bobg1951chevy
"6th Year" Silver Supporting Member
Posts: 4903
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08-03-12 02:48 PM - Post#2255421
In response to wrdabney
Since your initial post and our replies ....Who have you contacted and what advise were you given???
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