Look at my cyl. walls - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

J ROK · 01-11-2009, 10:36 AM

So about a year ago I had an SR in my car, and there was a few days where it was like monsoon weather, and at the same time my cheapo oil filter decided to work itself loose. So I ran my engine with no oil. I FAIL.

I took the motor out and shoved it in a corner. Now a year later I go exploring. The cams had alot of metal shavings on them. When I took the head off I was expecting alot worse but it doesn't look so bad in the cylinder walls. Just want some expert opinion.

I hope to core out the head, and re-bearing the block, new rings, hone the walls?

thanks for looking.

Sileighty_85 · 01-11-2009, 11:15 AM

Just because you still see cross hatching on the walls does not mean they are still good.

Over time the cylinder wall become uneven like \ / or / \ so you need to bore and hone the wall to get them straight again like | |

and with all those metal shavings inside the cylinder im sure it is not helping. (if it was there prior to pulling the head)
I actually see some scorring on the walls.

I'd be worried about what your crank and bearings look like.

But yeah get the block checked, Bored and honed for new oversized pistons
OEM SR20DET Pistons

OutToWinPAHC · 01-11-2009, 12:55 PM

Dont cut corners with internals. The motor is out, get it bored and rebuild the bottom end.

smelly240 · 01-11-2009, 03:40 PM

is that just dirt on the top of the piston (not the carbon - the crumbs) or is that metal shavings?

i would at least get it honed - boring .020 might be the way to go tho (so u never have to do it again)

01-11-2009, 10:36 AM	#1
J ROK Zilvia Member Join Date: Jun 2007 Location: Lighthouse Point, FL Age: 37 Posts: 282 Trader Rating: (1) Feedback Score: 1 reviews	Look at my cyl. walls So about a year ago I had an SR in my car, and there was a few days where it was like monsoon weather, and at the same time my cheapo oil filter decided to work itself loose. So I ran my engine with no oil. I FAIL. I took the motor out and shoved it in a corner. Now a year later I go exploring. The cams had alot of metal shavings on them. When I took the head off I was expecting alot worse but it doesn't look so bad in the cylinder walls. Just want some expert opinion. I hope to core out the head, and re-bearing the block, new rings, hone the walls? thanks for looking. __________________ AERO-K GARAGE

01-11-2009, 11:15 AM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Just because you still see cross hatching on the walls does not mean they are still good. Over time the cylinder wall become uneven like \ / or / \ so you need to bore and hone the wall to get them straight again like \| \| and with all those metal shavings inside the cylinder im sure it is not helping. (if it was there prior to pulling the head) I actually see some scorring on the walls. I'd be worried about what your crank and bearings look like. But yeah get the block checked, Bored and honed for new oversized pistons OEM SR20DET Pistons __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

01-11-2009, 03:40 PM	#4
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 43 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	is that just dirt on the top of the piston (not the carbon - the crumbs) or is that metal shavings? i would at least get it honed - boring .020 might be the way to go tho (so u never have to do it again) __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

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01-11-2009, 12:55 PM	#3
OutToWinPAHC Zilvia Addict Join Date: May 2007 Location: Florida Posts: 746 Trader Rating: (6) Feedback Score: 6 reviews	Dont cut corners with internals. The motor is out, get it bored and rebuild the bottom end.