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Author Topic: Bore Scoring  (Read 876 times)
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SiPotter
Member

Posts: 1


« on: 06 October, 2023, 06:46:19 PM »

Hi, Iím new to the Club and the forum. After being introduced to the Fulvia in the 1980's by my old boss in Cornwall and owning 3 1.3 S3's in the late 80ís into the early 90's Iíve recently bought a 1600HF reg. NSW 7M. The car has extensive history and although I was told the car had a motor rebuild in the last 5000 miles the bores (no4 in particular) are showing some signs of both polishing and scoring. I put a bore scope in today and can attach some images for comments. Thereís not a lot of carbon build up and compression is good across all 4.
Any advice would be much appreciated!


* 2023-10-06-11-01-30-513.jpeg (92.18 KB, 1280x720 - viewed 44 times.)
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Wangler
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Posts: 268


« Reply #1 on: 06 October, 2023, 08:30:36 PM »

Seems to me to be a case of if it ainít broke donít fix it.

Ok, there might be some scoring and possibly polishing. The compression is good so what could you do about it that would make any noticeable difference to it that doesnít involve dismantling the engine?

Use good oil and enjoy it, remembering that these cars are designed to be driven hard! Before the advent of bore scopes you would have been none the wiser.
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Fulvia Coupe 1976
Fulvia Coupe 3 1975
lancialulu
Press Officer
Permanent resident
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Posts: 4935



« Reply #2 on: 07 October, 2023, 05:54:46 AM »

It is easy to break or chip piston rings when assembling a Fulvia, or they sometimes break if not ďgappedĒ correctly. Those vertical scoring marks could be due to a ring problem.
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Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
Mikenoangelo
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Posts: 461


« Reply #3 on: 07 October, 2023, 10:09:14 PM »

 I also think its a ring problem as, if I understand the picture  correctly, the scratches are to the front or back of the cylinder relative to the alignment of the engine. Piston siezure marks are most often on the side to side orientation of the piston.

Mike Clark
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nistri
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Posts: 539


« Reply #4 on: 08 October, 2023, 04:07:18 PM »

Inxorrect fitting of piston rings is not rare because standard piston ring compressors cannot be used on Fulvias. Furthermore, there are around low quality rings of unclear origin. It is advisable to use Goetze (Germany) or Perfect Circle (USA) for rings, bearing in mind that for the 1298 engine the rings are the same as for the Fiat 126 early series (of course 2 sets are needed). The Fiat rings are more readily available (and cheaper). Andrea
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Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
Fulvia Coupe 1.3 S
lancianut666
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Slow but rough


« Reply #5 on: 12 October, 2023, 06:52:23 AM »

Nice tip regarding the Fiat rings. When rebuilding my Appia engine I had lots of problems with piston rings either breaking (pieces just breaking off!) or being the shape of a thruppeny bit to quote my engine man.
Clarkey
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Fulvia Coupe S2 Flavia Coupe 1967 1.8 Kugelfischer Prisma 1.6 carb Y10 Fila Y10 Touring Dedra 1.8 Dedra 2.0 Turbo Appia S1
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