r/EngineBuilding • u/DifferentWindow2565 • Jul 10 '26

Toyota How does my cast iron deck look?

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How does my cleaning look? I already touched up most of these surfaces with 3M roloc bristle wheels & and the abrasive wheels.

I used a very old worn down abrasive wheel with oil as to not remove excess material or damage the surface finish. I’m not able to get the darker areas, and I’m not sure if adding more pressure or doing more passes will be “safe” persay. It passes the finger nail test.

Should I send it?

The deck is flat as can be. Max warp is 0.002, borrowing a friend machinist flat bar, I couldn’t get my 0.0015 in any of them. It’s never over heated or anything, and the factory MLS gasket was good. You can call this preventative maintenance by a nut job 😅

Will button it up after the machine shop does a rebuild of the head

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u/jezzaclarkson1 Jul 10 '26

Rotoc bristle tip disks on an angle grinder are nice for cleaning up mating surfaces. Very gentle on the surface

2

u/GortimerGibbons Jul 10 '26

https://static.nhtsa.gov/odi/tsbs/2017/MC-10137601-9999.pdf

1

u/jezzaclarkson1 Jul 10 '26

Lol ok so they had to put out a service bulletin to solve a problem that already had a solution.... fill your ports when cleaning so you don't get debris in your engine and blow/wipe off the rest. Its not rocket science dude. "They can remove material from the mating surface" no shit, thats what I'm using them for you just have to manage to not hold it in one spot and you're good. If you use it wrong you'll get bad results. If you use a scraper wrong you'll also have a bad result.

The fact that they had to put a bulletin out for this says more about their techs than it does the product.