1958 Giuliette 750F 1300cc engine rebuild - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 6 (permalink) Old 04-13-2019, 03:12 PM Thread Starter
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Question 1958 Giuliette 750F 1300cc engine rebuild

Hello Alfa Gurus,
I'm in the process of rebuilding my '58 1300cc engine in my Giulietta 750F spider veloce. In breaking down the engine i found that the number #4 piston is
damaged and unusable. Does anyone have a spare forged piston or even a set if I have to purchase them that way? I understand that these pistons are no longer
made and the normale pistons will not work for this engine. Can anyone help or give me guidance. I would like to get this car back on the road ASAP.
Help Help Help!
Thanks in advance for your responses.
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post #2 of 6 (permalink) Old 04-13-2019, 09:06 PM
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You can have excellent pistons made that will be at least as good as the originals. Use your original liners, bored/honed to a slightly larger size.

I don’t believe you’d get judged harshly at a concours just because the pistons inside the engine are new. Like the bearings, gaskets, etc.

Don P
Carson City, NV

Past Alfas...
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
102 Sprint (never did anything with it, but wish I had)
74 Berlina (first new car - now certainly rusted into oblivion)
61 Giulietta Spider G-Prod Race Car (where is it now?)
84 Spider Veloce (rarely drove it, so sold it)
86 Quadrifoglio (Dull car - no more 115s for me)
1971 Montreal "The Full Monty". Fair winds and following seas

Current Alfas
59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
Oops. Add to the "present" list, 10204 01488, 2000 Touring Roadster project

And past...
Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
Zlin 50LA (+9 -6 gees, titanium spar, 1200 lbs, 260HP rumored to now be in Brazil)
1946 Luscombe 8A
Starduster Too (recently spotted at the Nevada City, CA airport - over 20 years and an entire continent separating it from our stewardship in Binghamton, NY)
1955 Cessna 170B (wife taught me to fly tailwheel in this)

And present...
64 Mooney M20E ("Rambo". My faithful steed for over 40 years) Over 55 years old, and just returned from a trip to Argentina in him
Newest in the fleet
1967 Piper Super Cub on Wipline amphibious floats (a true "all terrain vehicle")
2010 Triumph Thunderbird


You can snap roll an Alfa only one time...
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post #3 of 6 (permalink) Old 04-14-2019, 11:39 AM
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750F pistons

In the past I have purchased reproductions of 750 Veloce pistons from Venolia in SoCal, in both 74 and 75 mm bore sizes. Sorry I don't have a record of their part number.
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post #4 of 6 (permalink) Old 04-14-2019, 05:02 PM
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Decades ago, I used Venolia. It was quite good stuff. About 10 years ago I bought a set from them. Signs of aging in the organization, although product was good.

I’ve been using JE since then.

Don P
Carson City, NV

Past Alfas...
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
102 Sprint (never did anything with it, but wish I had)
74 Berlina (first new car - now certainly rusted into oblivion)
61 Giulietta Spider G-Prod Race Car (where is it now?)
84 Spider Veloce (rarely drove it, so sold it)
86 Quadrifoglio (Dull car - no more 115s for me)
1971 Montreal "The Full Monty". Fair winds and following seas

Current Alfas
59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
Oops. Add to the "present" list, 10204 01488, 2000 Touring Roadster project

And past...
Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
Zlin 50LA (+9 -6 gees, titanium spar, 1200 lbs, 260HP rumored to now be in Brazil)
1946 Luscombe 8A
Starduster Too (recently spotted at the Nevada City, CA airport - over 20 years and an entire continent separating it from our stewardship in Binghamton, NY)
1955 Cessna 170B (wife taught me to fly tailwheel in this)

And present...
64 Mooney M20E ("Rambo". My faithful steed for over 40 years) Over 55 years old, and just returned from a trip to Argentina in him
Newest in the fleet
1967 Piper Super Cub on Wipline amphibious floats (a true "all terrain vehicle")
2010 Triumph Thunderbird


You can snap roll an Alfa only one time...
DPeterson3 is offline  
post #5 of 6 (permalink) Old 04-15-2019, 07:38 PM
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Before you order an oversize piston set, make sure you've lined up someone to bore/hone the liners. I found this to be harder than you may think, especially for the 1300 liners. 2L liners can often be successfully bore/honed in a provided block as the distance from the bottom of the liner to the main journal housings is enough to get the tool in deep enough. The 1300 usually requires a dedicated (modified) block or fixture. Next time I do this, I'll spec standard bore pistons and if necessary, buy a standard piston/liner set just for the liners.

my 2 cents,
Jim
San Antonio, TX
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post #6 of 6 (permalink) Old 04-16-2019, 07:39 AM
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I have 3 1300 Venolias, and am searching for the 4th. I will reappear. These are in very nice shape.
Send me a PM with your e-mail address if interested.


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Gordon Raymond
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and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
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