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Brit01
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Joined: 24 May 2010
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 Posted: Thu Nov 17, 2011 2:45 pm Post subject: Gudgeon pin length - 1.7? |
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Just received 4 gudgeon pins and one is longer than the other 3!
I hope the 3 aren't for a 1.5 piston!!
What length should the pins be for a 1.7 piston?
Anyone know?
(these just travelled 7000 miles by post)
Cheers
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S2 33 1988 1.7 QV
Dellorto DRLA40 (32mm venturi) |
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Brit01
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| Posted: Thu Nov 17, 2011 2:57 pm Post subject: |
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Rough check with a ruler
63mm and 61mm pins!!!
which is which?
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S2 33 1988 1.7 QV
Dellorto DRLA40 (32mm venturi) |
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Brit01
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Joined: 24 May 2010
Posts: 665
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| Posted: Thu Nov 17, 2011 9:20 pm Post subject: |
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61mm apparently are the correct ones.
So I have 1 duff one from Peter!! Waiting for his response.
What a PITA.
Have to source another one now, probably from Buenos Aires costing me an arm and leg or maybe I'll just use one of the least worn pins as they don't really wear down much.
It's the small ends I'm changing that wear down.
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S2 33 1988 1.7 QV
Dellorto DRLA40 (32mm venturi) |
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RFlower
Alfa 33
Joined: 17 Feb 2004
Posts: 432
Location: S of France
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| Posted: Fri Nov 18, 2011 2:02 pm Post subject: |
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If the diameters are the same, can you not machine the wrong one to the correct length?
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Dick Flower, Nr. Carcassonne. '94 Trofeo 1.4 ie (F), '93 Imola 1.3/1.4 ie (now for breaking) (F), '91 1.7 ie (GB)(spare car), '86 Sprint 1.5 QV (F). '87 VW Syncro camper (F), '73 NSU Ro80 (F), '99 Fiat Seicento (F) |
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Brit01
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| Posted: Fri Nov 18, 2011 2:24 pm Post subject: |
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Thought about that but the inner wall is thinner on the longer one and weighs 108 grams at 63mm
The 61mm pins weighs 110 grams.
If I cut the 63mm one down 2 mm there will be a big weight difference that will be unacceptable.
Shame.
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S2 33 1988 1.7 QV
Dellorto DRLA40 (32mm venturi) |
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Brit01
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| Posted: Fri Nov 25, 2011 3:05 pm Post subject: |
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Peter from alfaparts is kindly sending me the correct 61mm 4th pin.
He had a box of 150 pins and though they were all the same.
Maybe the 63mm pin is from the 16v boxer??
We are not sure.
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Dellorto DRLA40 (32mm venturi) |
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