Ring gap

[GBW]

My replacement 1.5 diesel engine is ready for its pistons.

I can't find any recommendations for ring gap setting.

Anyone help please?

[Tony Brooks]

From Goggle - first hit.

 

As a basic rule of thumb, a gap of 0.004-inch of end gap per inch of cylinder bore diameter is a good place to start. Some second ring sets can be set slightly looser, but that depends on the ring configuration and the manufacturer specs.16 Jul 2015

 

Gap Rap: How to Measure and Set Piston Ring End Gap

 

OnAllCylinders

[GBW]

Thanks Tony.

[Tracy D'arth]

2 hours ago, GBW said:

My replacement 1.5 diesel engine is ready for its pistons.

I can't find any recommendations for ring gap setting.

Anyone help please?

If the bore and honing is correct and the right rings are used it is unlikely that they will need gapping. I set BMC 1.5D and 1.8D to 10 to 14 thou. but have not had to set any new rings for donkey's years. They always seem right straight out of the box.

[GBW]

I've found the definitive values in a BMC repair manual.

Top ring 0.012-0.017

Remainder0.008-0.013.

 

[Tracy D'arth]

57 minutes ago, GBW said:

I've found the definitive values in a BMC repair manual.

Top ring 0.012-0.017

Remainder0.008-0.013.

 

My rule of thumb was not far out then.  I still doubt that you will have to gap them straight from the box.

[MtB]

Surely the ring gap varies according to which ring tone you've selected...