Phantomkid

So im rebuilding my motor back to stock want to get her on the road and get used to it before i go and build up a turbo motor. A question for all you engine builders do you usually resurface the irons. Ill get pictures up to show you mine they are alittle worn but not horrible. I would like to save the 250 if its not very neccisary but i also want to make this motor very reliable. You know so i can put it back in if the turbo one blows in the future. I could image that resurfacing would kinda losen up the rotor because theres alittle take off from both sides.. any help would be great thanks guys

classicauto

iTrader: (3)

its pretty simple:
measure your irons and thourghly inspect the housings...if your irons have wear within the the spec - then re-use them.

However there is no doubt in my mind that even with used irons that are worn within spec, having re-surfacing (and lapping the housings) and re-nitriding them afterwards IS the best way and will garuntee that end of things.

I would say it would mostly depend on a couple things:

1) How close (or far) the irons are from spec
2) How much you really want the thing to reliable

Because if it comes down that they are on the border line, but you want a reliable engine - the money is well spent.

But measure them up and see what you have

BASTARD

iTrader: (4)

one other thing to keep in mind is E-shaft end play. You inadvertently shorten the whole engine when removing material from the steel plates. Just want to make sure that too much is not removed.

also the rotors are spec'd to the aluminum housings vise versa...not the end plates

Phantomkid

Yes i will be purchasing micrometers 01,1-2,2-3, even 3-4 to make sure i have all spec measurements and what is tolerable. Everything will be within spec, i guess i should have asked the company that im having do it how much they take off and if they use the protective coating and see what that measures to add make on and see if im within spec. I was just wondering if there was gonna be one of those things that like nah screw that use the money on some new tires kinda deals.. thanks for the input. About the rotors being spec'd to the hoousings is understandable thats what they sit in but if you take alittle bit off the plates on both side i think you should take that into consideration cause thats what makes the combustion chamber.

BASTARD

iTrader: (4)

If your going to have the lapping done... just make sure your going to have a shop that knows what they are doing ... the last thing you need is some hillbilly red neck grinding them like they would a flywheel