Oil Support rail 3.900-3.940
11-16-2006, 10:25 AM
#2
Phil...
If the piston manufacturer sent you the right support rail there should already be a gap when its installed on the piston. The ring will only overlap itself in its free state, not when installed around the piston (it opens up a little when you work its way on to the piston and is meant to do that to keep it tight). Also note the small punch mark that protrudes from one side....its meant to be face fown and located between either of the gaps in the oil rail ring land between the wrist pin hole. That is to insure the support rail doesnt spin under operating conditions.
Try to install all eight when your actually ready....getting one off a piston is a bigger PITA than installing it (without scratching a piston or screwing up the support rail).
Hope this helps...
Tony
If the piston manufacturer sent you the right support rail there should already be a gap when its installed on the piston. The ring will only overlap itself in its free state, not when installed around the piston (it opens up a little when you work its way on to the piston and is meant to do that to keep it tight). Also note the small punch mark that protrudes from one side....its meant to be face fown and located between either of the gaps in the oil rail ring land between the wrist pin hole. That is to insure the support rail doesnt spin under operating conditions.
Try to install all eight when your actually ready....getting one off a piston is a bigger PITA than installing it (without scratching a piston or screwing up the support rail).
Hope this helps...
Tony
12-02-2013, 06:03 PM
#3
Not to start new thread, I'm doing quick refresh on my motor and noticed that my oil rail support rings DO overlap on the pistons. I watched Probe Industries video where they say there is dimple to prevent support rail from rotating, and that ends should not overlap, but I don't have any dimples, instead support is prevented from rotating by overlapping ends in the pin hole.
Is this even possible?? I was ready to file it down so it would have gap, but I couldn't find any dimples
Is this even possible?? I was ready to file it down so it would have gap, but I couldn't find any dimples
12-03-2013, 09:35 AM
#5
Not to start new thread, I'm doing quick refresh on my motor and noticed that my oil rail support rings DO overlap on the pistons. I watched Probe Industries video where they say there is dimple to prevent support rail from rotating, and that ends should not overlap, but I don't have any dimples, instead support is prevented from rotating by overlapping ends in the pin hole.
Is this even possible?? I was ready to file it down so it would have gap, but I couldn't find any dimples
Is this even possible?? I was ready to file it down so it would have gap, but I couldn't find any dimples
thickness for the rail support and the expander plus two oil control rings. ANY
overlap like that and you would not even be able to fit the other three peices.
