Crank & rod bearings wear - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

splitfire · 09-17-2015, 07:49 AM

Greetings.

Can someone advise me in regard to wearout of these bearings?

Common sight:

Bearings of 1-4 cylinders, left to right:

Why are there worn areas near the edges of bearings?

This scratch on the rod bearing of 4th cylinder can be felt by fingernail.

Can I leave these bearings or I should replace them?

Croustibat · 09-17-2015, 08:33 AM

I'd say worn more on the sides means crank walk, not enough oil pressure, and/or crank journals with uneven surface. Can't say much more tbh.

09-17-2015, 07:49 AM	#1
splitfire Leaky Injector Join Date: Jan 2010 Location: KZ Age: 42 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	Crank & rod bearings wear Greetings. Can someone advise me in regard to wearout of these bearings? Common sight: Bearings of 1-4 cylinders, left to right: Why are there worn areas near the edges of bearings? This scratch on the rod bearing of 4th cylinder can be felt by fingernail. Can I leave these bearings or I should replace them?

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09-17-2015, 08:33 AM	#2
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 41 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	I'd say worn more on the sides means crank walk, not enough oil pressure, and/or crank journals with uneven surface. Can't say much more tbh.