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2.3l turbo Piston numbers/ sizing?


OkayKafka

OkayKafka

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This is from my 2.3l turbo engine that is likely (from the block code) from an 1984 SVO. I pulled the head off to do some inspections. The pistons and the cylinder walls are surprisingly clean. From the looks of it I don't have to rebuild the lower end. I've just been trying to before I go farther what the numbers 4 or 5 stamped into the pistons means. I've been looking but can't really find anything that's satisfying.
I know that manufacturers have different sized pistons they use but I'm not sure about Fords numbers and if it's normal to see two sizes in one engine.

I'm hoping that I don't have to do a rebuild on the lower end. What do you guys think?







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Dirtman

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Those are just hand stamped not cast. There are any number of reasons a builder would want to mark certain engine parts during assembly. I would be surprised if they actually ment anything useful to you. They could be from someone marking pistons after checking ring gaps, or the builder counting how many beers he had while putting your engine together.
 
OkayKafka

OkayKafka

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Dirtman said:
Those are just hand stamped not cast. There are any number of reasons a builder would want to mark certain engine parts during assembly. I would be surprised if they actually ment anything useful to you. They could be from someone marking pistons after checking ring gaps, or the builder counting how many beers he had while putting your engine together.
Click to expand...


If it's beers per cylinder then I'm pretty concerned. That's 18 beers and I'm sure that a 4 cylinder engine doesn't take long enough to have those reasonably spaced out.

I'm curious what it means. Especially when they are marked 4, 4, 5, 5 respectively. I have limited experience but I find it interesting that someone would hand stamp numbers like that *shrug*

I guess as long as it doesn't throw up any red flags about quality--- I guess I can keep planning on not rebuilding the bottom end. Last I had it running it wasn't burning oil and everything looks nice inside. I'd love to be able to just pretty up the block and treat it like a used long block.


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tomw

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If someone had balanced the pistons, they might have marked them as being 5,4, etc grams above/below the 'standard'??
I would pay more attention to the marks at the front of the piston as they are not what I would have expected in 'factory' installed pistons. (usually un-marked except for bore oversize) They are a brand, I think, and it is not FoMoco... Why not clean them up and post an image of those marks..?
tom
 
OkayKafka

OkayKafka

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62
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Location
Seattle
Vehicle Year
1987
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Ford
Engine Type
2.3 (4 Cylinder)
Engine Size
2.3L Turbo
Transmission
Manual
2WD / 4WD
2WD
tomw said:
If someone had balanced the pistons, they might have marked them as being 5,4, etc grams above/below the 'standard'??
I would pay more attention to the marks at the front of the piston as they are not what I would have expected in 'factory' installed pistons. (usually un-marked except for bore oversize) They are a brand, I think, and it is not FoMoco... Why not clean them up and post an image of those marks..?
tom
Click to expand...


Yeah, I'm not really sure what exactly those marks mean.



This is the clearest picture that I have. I don't have ones of all the pistons. I can get some later this week.
It looks like it may say 804 which I wonder if that's the weight.

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