Re: Piston Rings

Posted by RAB on February 03, 2002 at 03:13:03 from (195.93.49.182):

In Reply to: Piston Rings posted by Steve on February 02, 2002 at 08:55:57:

What they mean is don't try to run it in on tick over or light duties. In these cases the bores can glaze instead of the rings bedding in properly resulting in excessive blow-by. Often a lower grade or special 'running-in' oil is recommended to prevent this. The oil will allow the rings to scour the bores but won't be in the engine long enough to degrade sufficiently to cause bearing lubrication issues. Dont use a 'super synthetic' oil or wear reducing additives or similar until an engine is run in properly and completely, or it may not ever be run in - and that could mean high oil consumption for a long time!
Conversely the advice doesn't mean run it flat out. Just run it under a fair load at reasonable RPM and you shouldn't go wrong if everything has been done according to service specification.

The main trouble areas when re-ringing are 1) wear ridge in the bores so the new top rings strike it causing breakage(often stepped rings are used to overcome this) and 2) too much side clearance between ring and groove which can lead to oil-pumping. Both these will probably result in premature re-overhaul to replace pistons and liners or for a re-bore.

Follow Ups:

Post A Followup Name: E-Mail: Subject: Re: Re: Piston Rings Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]