Crossflow conrod question

[OliverSedlacek]

Does anyone know the bore of the oil jet hole in the big end?

[Duckpit]

Oliver hi

As you have had no responses, I thought I might make a suggestion. There are conrods and crankshafts for sale on ebay. You may get a response by messaging one of the sellers

Cheers

 

Nick

[Ian Macquarie]

Looking at the Ford Rods that came out of my Caterham supplied Supersprint:-

1/64" (1.58mm) drill will not pass through the hole

1.5 mm (1.48mm) drill will pass through the hole. (numbers in brackets are measured with a digital caliper.)

The hole is stepped - larger on the inside of the bore and also countersunk. My best estimate of the larger diameter is 4mm. The overall length of the hole is approximately 12 mm 8 at 4mm dia and 4 at 1.5mm dia. though these last measurements are not very accurate.

When my engine was rebuilt with steel rods, I know that the rods arrived with no holes and that Steve at Vulcan drilled holes in them before fitting, though I have no idea what the diameter was. A call may be worth while - he may be forthcoming with information - on the other hand he may feel that his knowledge is what people pay for and be reluctant to give details.

Ian

[Roger King]

I really wouldn't worry too much. Most steel rods don't have the holes and even some big end bearings don't have them and I've never known a problem to be caused by this.

[OliverSedlacek]

Thanks for the feedback. Roger, I'm just concerned because of the camshaft problems I've had.