can i use this to clean block during headgasket install? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jt1583 · 06-04-2007, 05:01 PM

bought this today, i need to clean the block surface during my headgasket install. will this be ok? its a 2" drill polishing disc

benefitx · 06-04-2007, 05:13 PM

uhmm...you need to have it surfaced with a machine, i think with that it will just come out uneven and cause problems

jt1583 · 06-04-2007, 05:28 PM

nah lots of people leave block alone if its a stock headgasket install plus ive got an iron block so machining isnt required nor necessary. what i am questioning is will it remove metal which i do not want

slider2828 · 06-04-2007, 05:32 PM

Just do a little test and see if it scratches. if it is soft like a scotchgard rough pad then Ima sure it is fine. Iron block, eh, prety hefty

steve shadows · 06-05-2007, 11:31 AM

Quote:

Originally Posted by jt1583

nah lots of people leave block alone if its a stock headgasket install plus ive got an iron block so machining isnt required nor necessary. what i am questioning is will it remove metal which i do not want

no. you clean the block, that would probably work great actually but use it with your hand not a freakin power tool or something. If your installing a metal head gasket you will need to get a fine sandpaper or sanding pad with a high grit and spend about an hour mirroring it by hand.

If your block and head were overheated, you will need to have the deck machined for level edge in order to insure the metal head gasket seals, this sucks if you want to continue to run your stock bottom end because you will need to remove your pistons and rods/crank etc and make sure the bearings are mic'd and up to spec before re-installing after the deck is machined.

Head after machining (resurfacing).

Block after DIY cleaning method

-cheers

O3DigitalBath · 06-05-2007, 12:44 PM

that will cut into the metal if used on a drill....

do it by hand.

boosteds13 · 06-05-2007, 12:52 PM

I'd be worried about shrapnel getting into the cylinders/oil passages. When I had my block done, the guy used a CBN cutter or some crap. Wasn't a bad price though as I had the whole bottom end disassembled, cleaned, surfaced and reassembled with new bearings, rings and freeze plugs for around $200 (not including the cost of the rings and main/rod bearings).

Before--

And after--

06-04-2007, 05:01 PM	#1
jt1583 Zilvia Member Join Date: Jul 2005 Location: Georgia Age: 37 Posts: 264 Trader Rating: (3) Feedback Score: 3 reviews	can i use this to clean block during headgasket install? bought this today, i need to clean the block surface during my headgasket install. will this be ok? its a 2" drill polishing disc

06-05-2007, 12:52 PM	#7
boosteds13 Zilvia Addict Join Date: Nov 2003 Location: Port Orange, FL Posts: 623 Trader Rating: (0) Rides Gallery: boosteds13 Feedback Score: 0 reviews	I'd be worried about shrapnel getting into the cylinders/oil passages. When I had my block done, the guy used a CBN cutter or some crap. Wasn't a bad price though as I had the whole bottom end disassembled, cleaned, surfaced and reassembled with new bearings, rings and freeze plugs for around $200 (not including the cost of the rings and main/rod bearings). Before-- And after-- __________________ "A CA? WTF is that? You shoulda got an SR yo." View my vBPicGallery!

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06-04-2007, 05:13 PM	#2
benefitx Banned from the Marketplace Join Date: Oct 2006 Location: suwanee ga Posts: 670 Trader Rating: (0) Feedback Score: 0 reviews	uhmm...you need to have it surfaced with a machine, i think with that it will just come out uneven and cause problems

06-04-2007, 05:28 PM	#3
jt1583 Zilvia Member Join Date: Jul 2005 Location: Georgia Age: 37 Posts: 264 Trader Rating: (3) Feedback Score: 3 reviews	nah lots of people leave block alone if its a stock headgasket install plus ive got an iron block so machining isnt required nor necessary. what i am questioning is will it remove metal which i do not want

06-04-2007, 05:32 PM	#4
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Just do a little test and see if it scratches. if it is soft like a scotchgard rough pad then Ima sure it is fine. Iron block, eh, prety hefty

06-05-2007, 12:44 PM	#6
O3DigitalBath Zilvia Addict Join Date: Apr 2006 Location: ~Orlando, FL Age: 40 Posts: 664 Trader Rating: (1) Feedback Score: 1 reviews	that will cut into the metal if used on a drill.... do it by hand.