Re: [Amc-list] Engine Break in - Synthetic Oil - con't

[Matt Haas <mhaas@xxxxxxx>]

Brien Tourville wrote:
> Subject:
> Re: [Amc-list] Engine Break in - Synthetic Oil
> From:
> Matt Haas <mhaas@xxxxxxx>
> Date:
> Wed, 08 Aug 2007 20:03:42 -0400
> 
> To:
> "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>
> 
> 
> During break in, there are two main parts that need time to seat. The 
> first is the camshaft (running the engine about 1500 RPM for 20 minutes 
> does that and the reason for the higher RPM is to make sure the lifters 
> rotate) and the piston rings. The card that came with the piston rings 
> in the engine for my 68 American (they are Sealed Power rings -- hardly 
> anything exotic) said that if the cylinders are finished a certain way, 
> the rings will seat in the first 10-15 minutes of run time. If they 
> don't, you have to refinish the cylinders and replace the rings. I know 
> that Mobil One has said that you can use it's oil for break in and it 
> will not interfere with the process but as was previously pointed out, 
> it doesn't make sense economically.
> 
> Matt
> 
> 
> 
> ===.===
> 
> 
> 
> 1500 for 20 minutes:
> 
> Yes - this is for an engine that was assembled with crosshatched and oiled
> cylinder walls - for storage / shipment reasons - rather than dry 
> freshly crosshatched cylinder
> walls.
> 
> 
> 'A certain Way' : 
> 
> said that if the cylinders are finished a certain way, the rings will 
> seat in the first 10-15 minutes of run time. :
> 
> Yes - freshly crosshatched - straight bores - no gouges or scratches in 
> the cylinders.

It was more than just that. It was specific about the grit of the 
finishing stones and the angle of the cross hatch pattern.

Matt
-- 
mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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