yes all the other rollers are nice and shiny, it seems like whatever coating that was has worn off, but yes its definitely a coating of some sort- looks like chrome, but prolly not

if i can get the roughness off of the 3 pistons, does it matter if there is still discoloration. the m1 intake had some of the same stuff on the mating surface and a green scrubby smoothed it out real nice, yet there was still som discoloration.

how bout the pushrods?

so you think a hone on just 2,4,6 will clean it up nicely?

 

they are crower enduro rockers and apparently have an alloy steel tip

 

I would more suspect something is ON the rocker, rather than something came off.... hit it with some brake cleaner, and see what it does. Worst case, take it with you when you take the block in, and ask the machinist.

They are going to get discolored anyway. Just so long as they are clean.

Just clean 'em up good, blow air thru 'em, make sure there is nothing that is going to flake off into the engine/oil passages. You should be fine.

Yep, ball hone should clean 'em right up. If would mic 'em out after you have them clean though. (machinists job.... he will tell you for sure if they are good to go.)

 

well turns out i read the casting # wrong on the heads. theyre r/t's, however theyre 1.92 intake. should i have the shop hog them out to 2.02? or is the flow difference nominal?

im going to dissasemble the whole thing and bring every thing to him. hes gonna hone out 2,4,and 6 as well as clean up all the parts and shot blast the heads for under $200, good deal?

 

i should add that there has been $420 of work done to the heads though: remove rough casting flash from intake ports, blend bowl area and polish exhaust ports

 

Depends on what you want from the motor. The smaller valves will actually give you better bottom end.... (of course, it IS 408 cubes.... not like it is going to be much of an issue. ) For the larger displacement engine, if it isn't too hideously expensive to get the larger valves installed, (and you will have to buy those too.....) go for it.

 

ok ill definitely get a price from him. will the r/t heads be prone to cracking if theyre bored to 2.02?

can you explain what the work done to the heads (as i listed above) actually means and what performance gains it provides?

 

Def of casting flash

A thin irregular ridge of metal on the outer face of a casting, resulting from seepage of the molten metal into the joint between the separate components of the mold used in its manufacture.


A very good explanation on bowl blending, about half way down the thread.

http://www.forabodiesonly.com/mopar/...p/t-11455.html

link on head porting

http://en.wikipedia.org/wiki/Cylinder_head_porting

 

so could they benefit from porting too?

 

anything that helps your engine breathe better, will help.