Piston and liner set

[ggcton]

Does anyone know if all R4 pistons are flat topped.
I bought a renault piston and liner set part number 7701 455 350 but the crowns are not flat and I have been unable to match the part number to check which vehicle they fit.
Thanks Gary

 

[angel]

747 (3-bearing) and 956 (5-bearing) engines use pistons with humps on their crowns. Is this the case on your pistons? What bore diameter do they have?

 

[ggcton]

Not very acurate measure but about 65mm

 

[Pavel]

I bought a set of the pistons, rings, liners, pins and gaskets in Germany as shown in the picture. The piston tops seem to be quite pretty flat. They are designed for 845 cc.

 

[ggcton]

Hi all having cleaned up the box a bit I have found a hand written message stating R5TL.
Can anyone confirm this and if so what is the engine size.
Gary

 

[Pavel]

Hi all,

befor I fit it oppositely: who knows, what means this symbol on the piston top? Is it a travel direction? A crankshaft symbol? Many thanks.

Pavel

 

[angel]

To ggton: The pistons are for the 956cc engine, that means Renault 4 Savane (post-87 TL). Also R5 TL.

To Pavel: This symbol must be towards the flywheel end of the engine. This should be done in conjunction with the correct connecting rod orientation, both of them are important! Consult your workshop manual, there must be a drawing somewhere showing all of these.

 

[ggcton]

Thanks Angel I will now have to decide what to do with them as my 4 is an 84GTL and I do not have a 5 (at present)
Gary

 

[angel]

They will fit your existing engine, without any other modifications needed (maybe some compression ratio measurement), but I doubt you want to downsize your engine... :-)