Weird question

[danieltovar]

Somebody told me i could polish the block deck is it ok to do that

 

[bryanwheat]

Somebody told me i could polish the block deck is it ok to do that

What do you mean by polish it?

 

[danieltovar]

these

7-Pieces Metal Buffing Kit-A10BK07 at The Home Depot

 

[bryanwheat]

That would be a waste of your time. If the surface is flat than the gasket will seal just fine. IF you want to run a mls gasket than it will need to be surfaced by a machine shop.

 

[danieltovar]

yes the block was resurface before is just that it has got dirty like rust bubbles i just want to make it shine like it was

 

[bryanwheat]

yes the block was resurface before is just that it has got dirty like rust bubbles i just want to make it shine like it was

Just take some light sand paper with a sanding block block and clean it up a bit if you are concerned about it. IF you want to run a mls gasket it needs to be re done at a machine shop. If you are running a composite gasket than you don't need to worry about it. Scrape it with a razor blade, wipe it down with acetone and install the head.

 

[danieltovar]

Just take some light sand paper with a sanding block block and clean it up a bit if you are concerned about it. IF you want to run a mls gasket it needs to be re done at a machine shop. If you are running a composite gasket than you don't need to worry about it. Scrape it with a razor blade, wipe it down with acetone and install the head.

It had I mls gasket is just that there is a problem with my head and its talking for ever at the machine shop. The block was deck was done to fit mls gaskets do i need to redo it again.

 

[bryanwheat]

It had I mls gasket is just that there is a problem with my head and its talking for ever at the machine shop. The block was deck was done to fit mls gaskets do i need to redo it again.

If the surface isn't perfect than yes it would be a good idea to have it redone which will require the engine to be torn down. You won't get it to the right consistency by simply buffing it. I would just run a composite gasket if you aren't making more than 500 horsepower.

 

[danieltovar]

If the surface isn't perfect than yes it would be a good idea to have it redone which will require the engine to be torn down. You won't get it to the right consistency by simply buffing it. I would just run a composite gasket if you aren't making more than 500 horsepower.

That is my goal the block is a stage 4 is that is 1000 miles on it, its just a took the head to up grade for 450 to 500 hp.
I want to know if its ok to polish it or it will affect the decking of it

 

[WES_393]

That is my goal the block is a stage 4 is that is 1000 miles on it, its just a took the head to up grade for 450 to 500 hp.
I want to know if its ok to polish it or it will affect the decking of it

Yes, you can prep the deck yourself using fine sandpaper and a sanding block. But it is messy and is hard to get that mirror shine the machine shop gives.

 

[danieltovar]

Yes, you can prep the deck yourself using fine sandpaper and a sanding block. But it is messy and is hard to get that mirror shine the machine shop gives.

So it will be good to try that kit from home depot. I just don't want to take any material and destroy the decking, cause it had been deck for mls gaskets.

 

[bryanwheat]

So it will be good to try that kit from home depot. I just don't want to take any material and destroy the decking, cause it had been deck for mls gaskets.

You are taking material off whether you use sand paper of buffing it with a wheel. As i already said, you are asking for trouble if you want to run a mls by polishing it yourself. .001 of an inch difference can cause the gasket to leak. In comparison a sheet of paper is around .003-.004.

 

[WES_393]

I wouldn't use that kit. Get some 1500, 2000, and 2500 grit sand paper. Step up the grit slowly and it should be very shiny by 2500. Just make sure you use a sanding block and try to sand the deck as evenly as possible so you don't create low spots. Also be sure to put rags in the cylinders and clean the block thoroughly before installing the HG with a solvent of your choice and a lint-free rag.

But just like Bryan is saying, this is the absolute minimum for prepping a deck for a MLS gasket. Some have had luck doing it this way, most others haven't. Your best bet would be to take it back to the machine shop.