Piston woes
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I’m into the engine now with new valves, guides, seats and finally got the adjustment right thanks to a friend’s extensive shim kit.
Lower end was going well too, crank ground -.010 although it hardly needed it. Cylinders were nice and round with a couple of minor scratch lines that I’d hoped to hone out. Everything seemed to be going well until I started to clean the standard size pistons. On 3 of 4 I noticed cracks in the skirts. See the photo below. I went over the cracks with a marker for the photo but they would be obvious to the naked eye.
Ray at RD Enterprise has replacement forged pistons but all oversize starting at 020 and quite expensive to say the least.
So my questions: Are the cracked piston skirts common on these old engines? Has anyone got original pistons. (There was in the archives a note indicating that Miles Wilkins had a bunch but that was ten years ago.) I’d be interested in used ones without cracks too.
- TomMull
- Second Gear
- Posts: 121
- Joined: 01 Oct 2018
I acquired pistons among the multitudinous raft of stuff that came with my Elan. I can take a look at what's there and get back to you. I'm no expert on which engine has what piston but I'll use your photo as a starting point.
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1967 Elan S3 SE DHC
1995 Caterham powered by Lotus
I'm light in the head, does that count?
1967 Elan S3 SE DHC
1995 Caterham powered by Lotus
I'm light in the head, does that count?
- wdb
- First Gear
- Posts: 39
- Joined: 25 Jul 2024
I have never come across cracked piston skirts on original pistons and I have pulled apart many that had not been messed with.
I bought the last 8 standard size nos pistons that Wilkins had, about 8 years ago, or so he said. Several turned up with pieces missing from the skirts. That turned into ANOTHER legal battle, and he would not see sense until I stopped my credit card payment. I would never deal with him again, and people who sing his praises on here get on my nerves. They should come into the real world.
I have a good set of low mileage STD original pistons, with skirts intact, that I would sell. Obviously, they will need new rings, which I can get for you.
If of interest Tom, send a PM.
Leslie
I bought the last 8 standard size nos pistons that Wilkins had, about 8 years ago, or so he said. Several turned up with pieces missing from the skirts. That turned into ANOTHER legal battle, and he would not see sense until I stopped my credit card payment. I would never deal with him again, and people who sing his praises on here get on my nerves. They should come into the real world.
I have a good set of low mileage STD original pistons, with skirts intact, that I would sell. Obviously, they will need new rings, which I can get for you.
If of interest Tom, send a PM.
Leslie
- 512BB
- Coveted Fifth Gear
- Posts: 1230
- Joined: 24 Jan 2008
I’ve seen a few sets of standard size pistons come up for sale. There are both new and used sets on eBay at the moment. As for rings Deves, who are here in the US, supply standard size rings for the Twin Cam.
- pianoderby
- First Gear
- Posts: 26
- Joined: 06 Jan 2022
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