3rdCoastPowerSports

iTrader: (5)

started porting the exhaust side of the heads this morning all was going well till i switched to 80 grit paper rollers and noticed this weird looking spot ( middle left side of this pic)


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let me know what you think... when i run a pointer across the spot it seems to be raised a bit.... any help is a appriciated

the is also a similar spot on the uper portion of this pic


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when i sanded on them a tiny bit it seemed to make them worse/spread

Paul Bell

iTrader: (9)

The first pic looks like a bolt. Were there sparks from this spot while you were grinding?

If yes then yes, you went too far.

3rdCoastPowerSports

iTrader: (5)

No no sparks at all. Im not sure what u mean by it looks like a bolt. I put a few drops of water on the spot in question to see if it would produce air bubbles or leak and it didn't leak or produce air bubbles

01ssreda4

iTrader: (96)

Those are the rocker arm bolts. They are drilled very close to the runners.

i6overboard

iTrader: (3)

Looks like rocker arm bolts, so no you didnt go to far, you can see the rocker bolts slightly in my port. Take the rocker bolts out and you should be able to finish cleaning that area up. The bolts just need sealer on the threads when you assemble the heads.

3rdCoastPowerSports

iTrader: (5)

thanks ya'lll i feel better about it now,,,

studderin

iTrader: (28)

wow great info.

hitting a rocker bolt in the exhaust port, haha look into that and see what you think.

hitting anything with 80grit, is not likely you can still see the surface cast finish and the parting line, you have .200 of alum there still. You removed maybe .010. The spring pocket is over there BTW, thats it. what valve and bore are you running. Work on the throat.

3rdCoastPowerSports

iTrader: (5)

sounded very strange and imposible to me as well but didnt want to be combative. i have stock bore size (i assume you mean my block bore size). and my valve are stock 2.00 on the intake and stock on the exhuast i think its 1.55.... i checked it out more and the spots in the picture look like they are part of the casting process

studderin

iTrader: (28)

what are you doing for the valve job? super budget stock or getting them cut?

Chris10an

iTrader: (1)

I really hope you going to pressure test them before you mount them on the car? I did a job like this one time, I it was for shore a leak..
It will save you for allot of work to test.... Bean there...

3rdCoastPowerSports

iTrader: (5)

well i am on a major budget but valves seats and guides are a very important factor so i am planning on spending some money,,, not alot though i plan on keeping the stock intake valves and im flirting with new exhaust valves, would slightly larger exhaust valve be a good idea. i will probably need new seats (im decent but no seasoned pro at porting). heads have 122K on them so guides might be necessary. any thoughts/suggestions?

3rdCoastPowerSports

iTrader: (5)

Yes sir i was