Guest jac580_1 Posted April 6, 2012 Share Posted April 6, 2012 (edited) Hello,New to the forum, but an old Buick Guy! I have a 1930 Buick Model 30-68. I stored it for a while and during that time someone stole the operating rod for the fuel pump. The fuel pump is ok but the rod is completely gone. Does anyone know a source or can anyone direct me where to find one. Also, does the rod fit several years. ie 1929 1930 1931 1932? Please Help!Regards,Jack Edited April 7, 2012 by jac580_1 (see edit history) Link to comment Share on other sites More sharing options...
Guest Mike Hanning Posted April 7, 2012 Share Posted April 7, 2012 Happy Easter Jack, According to the parts listing the operating rod you are looking for is as follows:P/N 3.236 123031 fits - 1930-50-60Therefore it fits the large series engine and is not suitable for other years or models. Possibly an owner of one of the above series could give you the dimensions of the pump rod and you could easily have one made. Regards, Mike Hanning Christchurch New Zealand BCA #40630 Link to comment Share on other sites More sharing options...
Mark Shaw Posted April 7, 2012 Share Posted April 7, 2012 In my 29 Buick it was just a piece of bar stock... If you cannot find measurements, you might be able to determine the correct length by inserting a rod into the block, turn over the engine to determine maximum and minimum stroke. Then measure the stroke of the arm on the pump to establish the correct rod length that will just stay in contact with the pump arm while running. Link to comment Share on other sites More sharing options...
Guest jac580_1 Posted April 7, 2012 Share Posted April 7, 2012 Thanks Guys! I guess I need to start looking for some steel stock and make this part. I think length is going to be the tuff part. Measuring the stroke off the cam while the car is running.....is questionable....don't know if I can do that. I saw that someone in the forum actually had the dimensions from a 1930-40 series. If anyone out there with a Series 60 could measure this for me I would be greatly appreciative. I think this is the only way i'm going to get this information.....unless I get lucky. I got to tell you....my luck has not been very good lately!Regards,Jack Link to comment Share on other sites More sharing options...
michaelod Posted April 8, 2012 Share Posted April 8, 2012 Jack,Welcome to the forum. Why on earth someone would want to steal the fuel pump rod is beyond me. In any case I removed the fuel pump from my engine and measured the rod with a digital caliper to be the following:Diameter 0.4325 inchLength 8.0 inchYou should be able to machine one without much difficulty.Hope this helps. Link to comment Share on other sites More sharing options...
Guest jac580_1 Posted April 8, 2012 Share Posted April 8, 2012 Michael,Thanks Again!Jack Link to comment Share on other sites More sharing options...
michaelod Posted April 8, 2012 Share Posted April 8, 2012 Jack,Since you are going to have one machined, here is some additional information that I did not notice when I first measured the rod. There is a groove machined on the cam end of the rod at the following location. I am not sure what it is for, perhaps oil control of some kind:Distance from end of rod: 0.16 inchI cant get a measuring tool in there but it appears to be about 1/32 in wide and 1/32 inch deep. Thanks, Link to comment Share on other sites More sharing options...
Mark Shaw Posted April 8, 2012 Share Posted April 8, 2012 Way to go Michael! Link to comment Share on other sites More sharing options...
Guest CAFoster Posted April 10, 2012 Share Posted April 10, 2012 The fuel pump rod in question is a cam follower and should probably be a made from hardened tool steel. Michael's measurements indicate that you may be able to find precision ground 7/16 shafting from places like McMaster Carr or MSC Industrials to fabricate it with.Chris Link to comment Share on other sites More sharing options...
Roland Harington Posted April 10, 2012 Share Posted April 10, 2012 I am in need of one for a 31 series 90 engine ,would it be the same dimensions ? Cheers Roland Link to comment Share on other sites More sharing options...
Guest 27071943 Posted June 5, 2012 Share Posted June 5, 2012 I am in need of one for a 31 series 90 engine ,would it be the same dimensions ? Cheers Rolandi have a rebuild fuelpump offer the price Link to comment Share on other sites More sharing options...
michaelod Posted June 5, 2012 Share Posted June 5, 2012 Roland,While the fuel pump shown above appears nearly identical to that used in 1930, there are significant differences between the engines from 1930 and 1931. The 1930 master series uses a 331 CI 6 cylinder motor and the 1931 has 8 cylinders. I would guess the dimensions given for the 1930 fuel pump rod would be in the ballpark but note that is only a guess. You would need to measure a fuel pump rod from a 1931 large series engine to check dimensions with any degree of accuracy.Thanks, Link to comment Share on other sites More sharing options...
Guest 27071943 Posted June 6, 2012 Share Posted June 6, 2012 (edited) Roland,While the fuel pump shown above appears nearly identical to that used in 1930, there are significant differences between the engines from 1930 and 1931. The 1930 master series uses a 331 CI 6 cylinder motor and the 1931 has 8 cylinders. I would guess the dimensions given for the 1930 fuel pump rod would be in the ballpark but note that is only a guess. You would need to measure a fuel pump rod from a 1931 large series engine to check dimensions with any degree of accuracy.Thanks,hii think the pump is not for 8-60 80 or90it is a note on 31 buick type B AC factory rebuilt8-60-80-90stamp 5751on the pump is a number 1521898 and 5751thev size is ca 8cm (3,25 " ? )regards fritz Edited June 6, 2012 by 27071943 (see edit history) Link to comment Share on other sites More sharing options...
Guest Chevelle1 Posted February 22, 2014 Share Posted February 22, 2014 I am wondering if you could turn the diaphragm part that bolts to the block around to different direction?thanks. Link to comment Share on other sites More sharing options...
Guest Chevelle1 Posted February 22, 2014 Share Posted February 22, 2014 What would you take for your fuel pump.thanks Link to comment Share on other sites More sharing options...
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