How To Clean Aluminum Head Gasket Surface
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03-27-201201:01 PM #i
Veteran Fellow member Iv Rings
Best way to clean block before reinstalling caput gasket?
About to supervene upon my head gaskets at present that my heads are back from the machine shop, simply was just wondering what is the best mode to make clean off the block to ensure a good seal with the new head gasket? I've heard of people using sand paper simply that seems a little aggressive, is this ok to exercise? I tried steel wool but it didnt take much off..
Moving-picture show for reference:
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03-27-201201:09 PM #2
Veteran Member Three Rings
is your engine still in the car?
I need to do my HGs or get a new motor...
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03-27-201201:10 PM #iii
Veteran Member Three Rings
And for cleaning:
I would scrape as much off as possible with a rozor blade, then use carb cleaner and a scotch bright pad... thats what I do on my quads..
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03-27-201201:15 PM #4
Senior Member Three Rings
Originally Posted by zrider91r 
And for cleaning:
I would scrape as much off as possible with a rozor blade, then use carb cleaner and a scotch vivid pad... thats what I do on my quads..This, with the addition of stuff paper towels into the cylinders and utilise air to blow the debris out well every now and then. One time complete remove paper and blow the cylinders out very well again. Should be fix to coil. Four used this countless times.
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03-27-201201:24 PM #5
Veteran Member 4 Rings
Originally Posted by zrider91r is your engine however in the motorcar?
I need to practice my HGs or get a new motor...engine is out of the automobile, much easier to simply pull the whole motor than to try and get the heads out with the engine still in the car.
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03-27-201201:25 PM #6
Veteran Fellow member 4 Rings
Originally Posted by BenjaminR This, with the addition of stuff paper towels into the cylinders and use air to accident the droppings out well every now and and so. Once complete remove paper and blow the cylinders out very well over again. Should be set to roll. Four used this endless times.
thanks, will give it a shot.
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03-27-201204:46 PM #seven
Veteran Member 3 Rings
High cut Nylon brush wheel on a drill then restriction cleaner works a lot better than a razor blade
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03-27-201204:59 PM #eight
Veteran Member Four Rings
Fine sandpaper is ok. Paired with a razor and restriction kleen showtime.
1996 A4 - Rolled into the woods
2001.v S4 - Stolen
2001 STG3+ S4 - Sold
2022 M3 - Blown up
2022 S3 [11.990 @ 112.38mph] - Current
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03-27-201205:04 PM #9
Veteran Member Iii Rings
Originally Posted by DiscoPotato Fine sandpaper is ok. Paired with a razor and brake kleen offset.
this. When my valve encompass gaskets were being replaced, this was exactly the method used.
01 Nogaro 605, AMD tuned with custom no-mod list signature.
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03-27-201208:39 PM #10
Veteran Member Three Rings
I'1000 telling you a nylon wire brush works a lot better. Sanding is ...
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03-27-201209:10 PM #11
Veteran Fellow member Iv Rings
If yous have a die grinder or drill get i of the Roloc discs with the little plastic fingers on information technology. They're very aluminum friendly and leave a nice make clean surface.
2006 Ford F-250 Amarillo Edition - MOARYLW - Mine
2001 Audi allroad 6MT - Wife's
Previous - MKIII Jetta, MKIV Jetta x2, MKIV GTi, B5.5 Passat x3, B5 A4 x2, B5 S4 x2, and tons of Domestic/Japanese crap
- Cody T.
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03-27-201209:47 PM #12
Veteran Member Iii Rings
razor and fine fine sandpaper works wonders many many motors and still counting
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03-28-201210:09 AM #xiii
Senior Fellow member Three Rings
Originally Posted past BlkdoutA4 engine is out of the car, much easier to just pull the whole motor than to attempt and get the heads out with the engine still in the car.
Why is it so hard to go them out while engine is in the car? Simply asking crusade im about to become my heads redone.
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03-28-201210:11 AM #14
Veteran Member Four Rings
Originally Posted by ReDLiTe Why is it then hard to become them out while engine is in the motorcar? Just request crusade im about to get my heads redone.
Information technology'southward been done only a real pain in the ass. If you lot tin can disassemble the turbo from the manifold, you tin pull out the caput with the manifold fastened. Very very tight working conditions.
1996 A4 - Rolled into the woods
2001.5 S4 - Stolen
2001 STG3+ S4 - Sold
2022 M3 - Blown up
2022 S3 [xi.990 @ 112.38mph] - Current
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03-29-201202:33 PM #15
Veteran Member 3 Rings
Originally Posted by s4cappa razor and fine fine sandpaper works wonders many many motors and yet counting
You done many motors past sanding and razoring the block and aluminum heads?
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03-29-201204:17 PM #16
Veteran Fellow member Three Rings
yes but using a very fine sand paper dont utilize gritty shit. heads usually clean up pretty well with just the razor blade lightly going over them
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03-29-201204:31 PM #17
Established Member Iii Rings
The people mentioning sand paper aren't talking about stuff you can meet the grit on. Go to the auto body section and become the kind for wet sanding between primer coats.
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03-xxx-201202:21 AM #18
Veteran Member Three Rings
Originally Posted by s4cappa yes but using a very fine sand paper dont use gritty shit. heads usually make clean upward pretty well with just the razor blade lightly going over them
And u haven't institute a easier style than sanding ..... Pro
I know what grit sand paper I'k just trying to save y'all folks some fourth dimension o well
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03-30-201206:14 AM #nineteen
Veteran Member Four Rings
Originally Posted by The_Auto_Tech If you lot take a die grinder or drill go i of the Roloc discs with the little plastic fingers on it. They're very aluminum friendly and leave a nice clean surface.
2nd this, gasket cleaner from the auto store and 3m roloc bristle disc:
http://www.amazon.com/3M-3M-18736-Ro...ef=pd_sim_sg_6
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03-30-201206:30 AM #20
Veteran Member Four Rings
all-time mode would be a lapping stone
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04-03-201203:42 PM #21
Veteran Fellow member Iv Rings
Are you lot suppose to use any blazon of sealant with the new head gasket, like when you replace the VCGs?? or practise you only throw in the new gasket?
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04-03-201205:52 PM #22
Veteran Fellow member Three Rings
nope simply gasket and torque
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04-03-201206:06 PM #23
Veteran Member Four Rings
Originally Posted by s4cappa nope just gasket and torque
thats what i thought, just wanted to make sure. thanks
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04-03-201206:27 PM #24
Veteran Member Three Rings
I used brake cleaner and the roloc disc Jibber posted. worked well.
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04-03-201207:03 PM #25
Veteran Fellow member Iv Rings
Originally Posted by Matt Danger I used brake cleaner and the roloc disc Jibber posted. worked well.
Where did y'all guys find the 3M Roloc disc? My local hardware store didn't have them... I got something I though would be similar merely information technology didnt work swell.
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04-03-201207:27 PM #26
Veteran Member Three Rings
I purchase reloc discs from Snap-On guy and i have seen them at some parts stores. Use that than clean upwards the dust with restriction cleen and a towel.. Make sure yous put rags or something in cylinder walls to keep clay out.
-02 F'in Silver. GT2560/due south AWE, ER/s RS3 Wheels, KW/s and every other typical S4 upgrade.
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04-03-201208:51 PM #27
Veteran Fellow member 4 Rings
Originally Posted past GetAwayFromMe I buy reloc discs from Snap-On guy and i accept seen them at some parts stores. Use that than clean up the dust with brake cleen and a towel.. Make certain you put rags or something in cylinder walls to keep dirt out.
Same way I've always done it.
2006 Ford F-250 Amarillo Edition - MOARYLW - Mine
2001 Audi allroad 6MT - Wife'southward
Previous - MKIII Jetta, MKIV Jetta x2, MKIV GTi, B5.5 Passat x3, B5 A4 x2, B5 S4 x2, and tons of Domestic/Japanese crap
- Cody T.
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04-03-2012x:18 PM #28
Veteran Fellow member Iv Rings
Originally Posted by BlkdoutA4 Where did y'all guys find the 3M Roloc disc?
From the link I posted.
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04-04-2012x:12 AM #29
Veteran Member Three Rings
Originally Posted by BlkdoutA4 Where did you guys notice the 3M Roloc disc? My local hardware store didn't accept them... I got something I though would be similar simply information technology didnt work corking.
I got mine through Amazon, same link Jibber posted
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04-04-201212:24 PM #30
Veteran Member 3 Rings
Some of the roloc disks come in different dust. If it'due south to course it volition brand the surface end rougher than OEM. Rough surface is merely a starting identify for combustion gas to get-go a leak. The smoother the meliorate on MLS type gaskets. If it's cleans up with scotch brite easy then use it otherwise get a very fine cut roloc deejay. I hand lap with a flat stock aluminum block with 400+ grit lubed to get the surface finish smooth.
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Source: https://www.audizine.com/forum/showthread.php/477587-Best-way-to-clean-block-before-reinstalling-head-gasket
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