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whitstella

Active Member

• Aug 29, 2015

• #1

Hi fokes

I've just stripped my 200 tdi engine for a rebuild and I'm trying to see if the pistons are past there best. Looking over them I removed the rings from 1 piston and the bottom 2 rings look fine , but the top 1 looks tapered is that right or should they be a rectangle section.

And clean should the bores be I've given them a hone and I can still see marks in the bores I can not feel any thing but I can see stains. Is it a reborn job ?

Cheers fokes.

 

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lynall

Well-Known Member

Full Member

• Sep 4, 2015

• #2

Pics will help
Homing should leave cross hatching in the bores, if you have vertical marks its probably rebore time.

 

jamesmartin

Well-Known Member

• Sep 4, 2015

• #3

whitstella said:

Hi fokes

I've just stripped my 200 tdi engine for a rebuild and I'm trying to see if the pistons are past there best. Looking over them I removed the rings from 1 piston and the bottom 2 rings look fine , but the top 1 looks tapered is that right or should they be a rectangle section.

And clean should the bores be I've given them a hone and I can still see marks in the bores I can not feel any thing but I can see stains. Is it a reborn job ?

Cheers fokes.

Click to expand...

any pics? if rings worn contact face will show signs of abrasion , and you feel for ridges on ring groove, with heavy wear ring wears the groove

 

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whitstella

Active Member

• Sep 6, 2015

• #4

Having a rebore so new pistons required now.

 

Kwakerman

Well-Known Member

• Sep 6, 2015

• #5

Ideally you should buy the pistons before you get the rebore, that way the cylinders can be individually matched to each piston by the engineering company.