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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #1 ·
Can anyone tell me the exact length of the old style fuel pump pushrod as on the pumps that were mounted on an angle back towards the carburettors (as against the pump being mounted at a right angle to the motor as in the 2litres).
Our Giulia Ti had a non working mechanical fuel pump replaced by a Facet electric by some PO and we are getting car back to original-found pump had too short a pushrod from a 2litre so going to use one of the lathes in our factory to manufacture one but I would like to know correct length so I can machine end in lathe.

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Trained (ex)Professional, , 1953-2018 RIP
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I posted the two rod dimensions, with pics, on this BB a while ago. Try doing a search but if you come up empty, please let me know and I'll remeasure them.
 

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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #3 ·
Jim, had a good look for that posting but couldn`t find it-any chance of remeasuring?
Thanks

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Trained (ex)Professional, , 1953-2018 RIP
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Sorry for the delay. I looked but couldn't find the two pushrods. What I did find was a single pushrod which I think is the outer rod (the rod that pushes on the fuel pump). The dimensions are 51.74mm long and the diameter is 5.969mm as measured with a Mitutoyo vernier caliper. I know that the second rod is a different length and diameter so as to make the rods not interchangable.
 

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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #5 ·
Thanks Jim, I`ve turned a stainless rod to correct diameter using the original too short rod that was already on the car and just need to cut to correct length now,-I`m getting bloody lazy as I could have taken the fuel pump off our Junior & measured correct rod length but I hoped someone on the BB could save me a job.
What do you mean by "outer rod"-there`s only one rod directly off the oil pump eccentric if I recall correctly. Isn`t there?

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Trained (ex)Professional, , 1953-2018 RIP
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16,232 Posts
The cars fitted with a fuel pump that's angled about 45* toward the back off the front cover (1750 for example), have two push rods; the inner rod, which is actuated by the oil pump shaft eccentric and the outer rod (which pushes on the fuel pump) is actuated by the inner rod. Two rods are necessary as a line drawn between the inner pushrod bore and the fuel pump is not straight. Engines with the fuel pump mounted at 90* to the crankshaft centerline, such as the 2l in this pic, use one pushrod.
 

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Thanks Jim, I`ve turned a stainless rod to correct diameter using the original too short rod that was already on the car and just need to cut to correct length now,-I`m getting bloody lazy as I could have taken the fuel pump off our Junior & measured correct rod length but I hoped someone on the BB could save me a job.
What do you mean by "outer rod"-there`s only one rod directly off the oil pump eccentric if I recall correctly. Isn`t there?

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6

Slightly shifting the focus, is stainless steel going to be adequate? I'm currently putting together my 67 GTV and trust I have the correct rod(s), but I have seen the original rods wear out (end wear); maybe because of the changes to the oil formulation or owner neglect, but in any case the original push rods seem to be made of a hardened chrome-vanadium steel, isn't stainless too soft for this application?
 

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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #8 ·
I believe the grade of stainless I am using will do the job-Chrome Vanadium steel would of course be better but only being really familiar with the later twin cam engines I operated on the basis of assuming I was dealing only with one long pushrod and essentially compressive force. The assumption was with a fuel pump tester I could keep an eye on effectively the stroke length and therefore wear on the rod.
I think I may have to rethink things perhaps although has anyone seen these rods for sale-can`t say I have on the UK sites I normally buy from-I`ll have to recheck.

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Trained (ex)Professional, , 1953-2018 RIP
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I've purchased the rods from Richard at Alfaholics. I've also found that many Alfa parts suppliers have oddball parts that are, well, too oddball or of insufficient quantity to catalog. I'd suggest sending an email.
 

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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #10 ·
Thanks Jim. Don`t you ever sleep ?
It must be about 2am where you are, isn`t it?

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Only when I'm tired. :rolleyes:

Now that you mention it though, it's just after 21:00.
 

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Do you want to keep the mechanical pump for originality's sake? If so, I applaud that. But if you just want a good pump, Carter CRT-P4070 self-pressure-regulating rotary pumps are less than $80US and work awesome with Weber/Dellorto carbs...

Karl
 

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`61 Giulietta Spider, `65 Giulia Ti 1750, `69 GT junior 1600, `73 Spider 2000, `74 GTV 2000, `98 156
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Discussion Starter · #13 ·
Karl, I want to keep the car as original as possible (despite the 1750 engine) It is a relatively "unmolested" car and did have a Facet electric fuel pump fitted when I bought it around 4 months ago which I suspect was installed in the mistaken belief that the mechanical fuel pump which was still on the engine was faulty as it would only supply enough fuel for the engine to idle only-its turned out to be a wrong length pushrod-hence my enquiry re length.

Richard J

`65 Giulia Ti, `69 GT Junior, `74 GTV 2000, `76 Alfetta GTV, `77 Alfetta GTV, `84 GTV6
 

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Ah, cool. Glad to see people willing to devote time to this kind of thing!

Karl
 
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