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Discussion Starter #1
As the title says, should cylinders be honed before fitting new piston rings?

I've read lots of conflicting info on the web' one seemingly knowledgeable poster suggested it is required on older engines but not on modern ones.

So, is it required for a 2.0 hdi?

Thanks.
 
D

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Depends on the damage or carbon buildup. What engine?

Sent from my GT-S5690
 

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:iagree: I would suggest light honing as the apparent smooth bore is where the old rings have bedded in and the microscopic grooves will be in line with the movement with the old rings. Honing will smoothout the bore putting grooves in the transverse direction and the new rings will bed in and cut their own new grooves. The difference in an HDi engine is lighly to to minimal but every bit of added compression is more hp and more mpg. Light honing means don't change the bore size or you will have another headache.
 

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If you want to do it yourself i would use a glaze buster most good motor factors can supply one and you can fit to most drills
 
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