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Old 09-03-2021, 11:00 PM   #1
Orgreth
 
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Default 88 Nissan D21 -2.4L Engine Bore

Hey guys,
So I am a new owner of a D21 that was sitting for 7 years and had a blown head gasket, so that caused some bad rust in the cylinders ... this has lead me to take the Block down to a machine shop and have them bore them out 1mm to remove any pitting. I was curious because it's electronic injected will I need to do anything to the electronics? Will the computer compensate for the extra displacement? I have been searching for information but not much luck, thanks in advance!
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Old 09-04-2021, 12:37 AM   #2
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I don't know. But, I really, really doubt it.

On Camrys, you can swap in the newer 2.2 in place of a 2.0 and the ECM handles it just fine.

On a TBI chevy 350, you can bore em .030 w.o a problem.
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Old 09-04-2021, 11:49 AM   #3
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Have the stripped block "hot tanked" by the machine shop.


If, after you manually clean the bores with soft rags and degreasers you, and your machine shop, find pitting, they will want to do a significant oversize bore. Thus new pistons and rings, but wait to order them because the shop will slowly increase the bore until the pits are gone.


But if still bad, then they will need to sleeve. Now getting big bucks.


Or, after cleaning, you may find the rust is not too bad, and just a good honing will clean up the bores.


Be sure to replace the oil pump too.
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Old 09-04-2021, 05:39 PM   #4
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Thanks for that, we cleaned the block and tried to hone the cylinders and there was still pitting. Also the machine shop needed the pistons before they could bore so I went with 1mm to insure that the pitting was gone. Have a new oil pump ready to go one once I can start putting things together.

Last edited by Orgreth; 09-04-2021 at 10:53 PM.
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