Overboring

Discuss topics related to the CA18DE and CA18DET series engines.
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blownhemi
Posts: 296
Joined: Tue May 19, 2009 3:39 am
Car: S13 200SX CA18DET HX35
Location: Hungary, Eu.

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Does anybody know whether it is safe to overbore a DET block, to +0.5 or +1.0mm? Does it have any surface treatment on the cylinders, that overboring will remove, or is the whole block just bare iron?

I'm asking, because it's a 21 year old block, so both for some peace of mind, and so that I don't have to wait 'till I can get it apart for measurements, I'm contemplating overboring it regardless, and ordering overbore pistons right away.

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float_6969
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yes, you can go with either .5mm or 1mm. I went with .5 to leave more meat in the cylinder walls, and if I mess anything up, I can bore the block out again to 1mm if needed.
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blownhemi
Posts: 296
Joined: Tue May 19, 2009 3:39 am
Car: S13 200SX CA18DET HX35
Location: Hungary, Eu.

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Thanks!
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float_6969
Moderator
Posts: 17366
Joined: Mon Aug 26, 2002 1:55 pm
Car: CA18DET swapped 1995 Nissan 240sx (too many mods to list)
2015 SV Leaf w/QC & Bose (daily)
Location: Topeka, Kansas
Contact:
Contact float_6969

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NP, Glad to help.
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