Piston ring orientation & ring gaps

[GrahamS]

I’m after the official Renault manual which has the piston ring orientations and ring gap details. Needs to be the official source!

Would be great if it also had the oil pump cover torque specs in too.

Cheers

 

[Mr Trailer Man]

@NorthloopCup is your man

 

[NorthloopCup]

I’ll have to have a look when I’m home.

 

[NorthloopCup]

@GrahamS

R3 maxi for reference:

And F4R:

 

[GrahamS]

Perfect! Thanks Mark!

 

[Paulstewart20]

Where can we download this @NorthloopCup?

 

[NorthloopCup]

Where can we download this @NorthloopCup?

@Typhoon was hosting all the manuals mate, but not sure if he still is.

If you’re after piston to bore clearance measurements though I don’t recall seeing any - only bore measurements and piston diameter measurements. Those sort of measurements are only usually needed if you’re fitting aftermarket wossner pistons for instance.

 

[Paulstewart20]

Ok thank you, I had low compression so I am hoping to just replace rings it is all standard stuff, it's a little frustrating not having an actual manual for this stuff, trying to find out if it is rings and not bore or piston

 

[NorthloopCup]

Ok thank you, I had low compression so I am hoping to just replace rings it is all standard stuff, it's a little frustrating not having an actual manual for this stuff, trying to find out if it is rings and not bore or piston

could be valves as well mate. Check for cracks in piston ring lands.

 

[Typhoon]

@Typhoon was hosting all the manuals mate, but not sure if he still is.

If you’re after piston to bore clearance measurements though I don’t recall seeing any - only bore measurements and piston diameter measurements. Those sort of measurements are only usually needed if you’re fitting aftermarket wossner pistons for instance.

I’ll have them all back up shortly brother. Just sorting a few backend parts of the website etc.

 

[Paulstewart20]

Just removed the top piston ring the existing gap was 0.35+ or - 0.05
brand new ring gaps are 0.40 + or - 0.5 how is that even possible?
Middle ring down from 0.70 to 0.40 so hopefully my compression loss is through the middle ring but I'm stumped why a new ring would have a bigger gap than the old can anyone shine any light its also has shorter depth existing ring is 3mm new is 2.71 rings were bought through PMS

 

[GrahamS]

is your bore in spec? I had Hastings rings and they all needed filing.

 

[Paulstewart20]

is your bore in spec? I had Hastings rings and they all needed filing.

The gap would be too big then surley its on the edge nowband the new ones are a larger gap to the old ones, bores are all around 82.50 give or take 0.10