 Oil rings in 351W
Hi all you Mustang guys
Im trying to rebuild a 351W for my 69 Fastback. It was recently imported to denmark from the US.
The engine had never (in my possesion) run very good, so i started to disassamble the engine to find the mistake. First of all, theres a comp. cam cam for a 302 ! inside..that cant be right.
Secound, the camshaft coud not be turned by hand. Needed a lot of force to turn it. I thourght it was the main bearings, but there all good. It turned out that it was the oil rings on the pinstons. The compression ring are good, has the right clearrence etc.
One pinston can bearly be pushed by hand inside the cylinder, and i dont think thats right. The bore is still 4 inch as oirg.
When i only have the compression rings on the pinston, it moves fairly, but when the oil rings gets on, not faily.
Its like that its oilrings for 4.020 bores or something like it.
I have looked at summit racing, california mustang etc to find oil rings smaller than mine, but its like you have to buy a compleete set of pinstons ....can any of you guys help me ?
Best regrads
Anders B. Jensen, Denmark | 
