I am building a 2.1 Pinto with Cosworth rods and V6 pistons and have had to solve the piston pin oiling problems when fitting Cosworth rods.
Sierra rods have a spray jet that sprays oil from the crank through the rod and up to the piston, Cosworth rods don't have the spray jet as they use a spray bar off the oil pump.
The solution is to drill the Cosworth rods, fiddly and expensive or do what i did and fit a Pinto high presure pump with the top from a Cosworth pump and a Cosworth pickup and spray bar
or, and i found this sfter i bought the Cosworth pickup and had fitted the rods
Cut a small groove in the top of the big end bearing housing so oil splashes out of the big end bearing and is flung up the bore oiling the pin.
As long as your oil control rings are sound you will not suffer from to much oil up the bore
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15th November 2009, 07:07 AM
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