How To Clean The Block For An Mls Headgasket

BogusSVO · Jun v, 2022

How to Make clean a Caput Gasket Surface

In that location are many ways to clean a head gasket surface.
This is merely one style, and information technology is the method I adopt.

I do not like the use of "rol-locs" for cleaning a head gasket surface, for cake or head.
Cast iron or aluminum.

This is for COMPOSITE Head gaskets, Not MLS

MLS Head gasket surfaces need more than prep.

A rol-loc can an will "wave" a gasket surface when used improperly. In near cases information technology is.

So do not employ this!!

What I adopt to employ is a hard back body board with 80-100 dust sand paper.

The reason to exercise it this way is....
one) more coverage expanse
2) volition not "wave" the gasket surface
3) will prove depression spots in the gasket surface

Use moderate pressure level when going over the gasket surface.

and go at different angles, using long steady strokes

and

You desire to go over it plenty to just "shine" the surface and remove all the one-time traces of the head gasket simply not remove the metal of the block or head.

You should end upwards with something like this.

Now the surface is prepped so the head can exist checked for warp and other imperfections.

Notice the dark marks above the exhaust valves and around the water ports, this shows the low areas and burn rings.

This head needs to be surfaced and so to hold a head gasket properly.

turboglenn · 6,378 109 November 5, 2007 RIpley, West_Virginia

Practiced info, i think a lot of people demand to be educated about how damaging a roloc disc can exist to a gasket surface. I see and then many people clean gaskets off of proficient components with them and i but cringe and close my eyes thinking "well, that parts gonna leak from now on" . Hell, i try and warn most of them but few people seem to believe me that the little scotch brite material tin can turn their engine into a great paper weight in no time. Used lightly to get some things off certain gasket surfaces is ok, only rather than risking the chance if some one willl know how to use one correctly and gently i just advise against it all together

How always i didn't actually know about the torso block being condom, but i know from your posts yous know what you're tlaking about. so i'll keep that in heed, but to be honest i usually will take the slow route and spray gasket remover on, so use plastic scrapers for most of information technology and then the little tough parts i'll plow a normal razor straight upwards and scrape side to side (agian actually lightly)

BogusSVO

Turboglenn..... if that is the method you utilize and are comfy with, by all ways stay with information technology!

I wish I have taken pics of head gasket surfaces that were ruined by rol-locks, I will say a rol-loc dose have its place, I take no problems with them being used for cleaning exhaust manifolds and intakes. But those take much thicker gaskets that tin can accept up the "wave" a rol-loc leaves.

turboglenn · 6,378 109 Nov 5, 2007 RIpley, West_Virginia

Yea, it may not be very fast but it gives me a little re-asssurance that i'one thousand not harming annihilation in the process.

I am curious most using the block with 100 grit though. I think i'thou gonna have to give that a try next time i have a stubborn gasket to make clean off a similar surface.

Aside from the trunk-block what would you advise for cleaning the engine block in the areas between the cylinders in that location the material is thin? Also practise you recomend any difference in cleaning media or technique on the cast atomic number 26 block. or any departure between cast atomic number 26 and aluminum

BogusSVO · v,893 302 Jul 1, 2009 Pensacola, Florida

turboglenn.... I utilise this method on both blocks and heads, cast atomic number 26 and aluminum.

I take not had any issue any way with this.

as far every bit the thin spots between cylinders, This way has worked for me.
I had to replace the HG on a 2.3 ford in the chasis, and this is how I cleaned the block.

turbo_rookie · 102 0 Mar 20, 2022 columbia, Missouri

what all would be needed to do to a block and head if one were to run a MLS gasket? i bought a MLS gasket and am curious as to what i will need to do to get a adept "seat". is this something a person can exercise or is it automobile shop specific work?

BogusSVO · 5,893 302 Jul 1, 2009 Pensacola, Florida

turbo_rookie.... it should be prepped by a machineshop for best results, at least the commencement time,

read this....
http://world wide web.dsmtuners.com/forums/new...face-4g63t-cylinder-caput-mls-head-gasket.html

the reason I say a machine shop, is that the surface finish is and then important. Not knowing what condition or how many caput gaskets have been replaced on your block and head, become them both surfaced to the proper cease.

At present if y'all do not accept the fourth dimension to have the block milled, I would go to composite head gasket w/ARP caput studs, if y'all look you will find many running 30 PSI + on a composite HG with a good tune.

sschambers · 143 iv Sep 26, 2007 Hermitage, Pennsylvania

I realize this is about 2 months erstwhile but I wanted to add my two cents...with the proper tools and proper know-how, a rol-loc, a directly border and a good feeler gauge set will get you by on most head gasket jobs. I've done many, many heads similar this. Many iv cylinder cars including my old GST, a buddy's 420a, a few Cavaliers and my own 300Z'southward heads and block decks simply to name a few. (have a higher fail chance on the Z - ii heads, ii decks). Also, I use the rol-locs that attach to a drill, non a die grinder. You must take into consideration the roughness of the disc (or 'cookie' equally almost call them), how fast its spinning and how its cutting. I've e'er used the maroon colored discs (medium) and a cordless drill. I do this after scraping virtually of the old gasket off. When I experience somewhat satisfied, I'll get through with the straight border and feeler approximate. I'll repeat these steps until I feel fully confident in the surfaces. And then I'll clean everything with clean rags and brake cleaner. If anyone ever does this method, y'all take to take into account the RA (roughness average) then don't use something as well coarse/heavy. Let the tools you have practise the work, don't forcefulness anything and have patience. Equally an enthusiast I absolutely love doing piece of work like this and seeing the result. My Z has ii MLS caput gaskets along with new(er) gaskets throughout the engine (everything done within the last ten,000 miles. Its a summertime motorcar, hardly driven). Most people on the Z forums warned me, swore upwardly and down that I NEEDED the heads to be resurfaced. Well neither i was professionally done and the car runs like new, no problems whatsoever. And then every bit long every bit over-heating wasn't present and there's no warapge, there's really not a point in getting your heads machined.

BogusSVO · 5,893 302 Jul 1, 2009 Pensacola, Florida

SSchambers... To me, the method I have laid out is elementary and safe.
Rol-locs get alot of use in alot of shops, well-nigh people do not use the intendance yous do when ckeaning cake/head.
If the rol-loc is used on an edge, it will "wave" the surface, and will roll the edges
For well-nigh "common" guys or new guys wrenching or learning to wrench, I would perfer to come across them use this method, than a rol loc.

At that place are many more than ways to clean gasket surfaces, This is just the ane I was taught over twenty years ago and still apply.

jrohner · 2,667 x Sep 25, 2004 Willmar, Minnesota

Razor blade has always worked good for me.

rlacasse1 · two,666 9 Jan 6, 2009 Scott AFB, Illinois

So 80-100 dust sandpaper won't remove too much material from the caput or cake?

I have always used a rol-loc carefully and have never had a problem, but I'g open up to new ways. I would just be worried that I would screw something up with the sandpaper.

BogusSVO · 5,893 302 Jul 1, 2009 Pensacola, Florida

You are only doing a few strokes with the longboard/sandpaper.

Plus a rol loc will not show low spots in the deck.

You run less of a run a risk of screwing something up with the longboard/sandpaper when compaired to a rol-loc

Bud92gsx · 22,735 238 Jan 16, 2008 Wisconsin, Wisconsin

Mods should make this a tech article..Your feel makes it actually worth while to read and follow the same manner you exercise it..

rlacasse1 · two,666 9 Jan 6, 2009 Scott AFB, Illinois

OK, question. Since I don't have my roloc handy I am using your method.

Is it ok to utilise a sanding block that has foam on the bottom of it. I'm kind of iffy on that. I feel that if I employ i with cream it will coil edges since the cream volition bend around edges.

And so should I apply one that is simply metal on the lesser, or is foam ok?

Judge I should add, the i I have has cream on the bottom but it is really stiff. I take to push really difficult to go the foam to give. I think it'll be ok, only I want opinions.

bryanwheat · 7,107 181 Aug 16, 2004 Columbia, Missouri

OK, question. Since I don't have my roloc handy I am using your method.
Is it ok to use a sanding cake that has foam on the bottom of information technology. I'm kind of iffy on that. I experience that if I utilize one with cream it will roll edges since the foam volition bend around edges.

So should I employ one that is just metal on the bottom, or is foam ok?

You can just utilise a good scraper. IF you lot hold it at the right angle you will never scratch the head or deck surface.

95AWD6Bolt

Someone should link Jafromobile's youtube video on this topic. He uses the sander mentioned in the op'south post and a razor blade. It provides step by step details on how to do it.

I would link information technology but youtube is blocked hither at piece of work.

rlacasse1 · 2,666 9 Jan 6, 2009 Scott AFB, Illinois

Well, I typically apply a rol-loc, I just don't have my compressor hither and so I'thousand screwed.

Simply I'll youtube that name.

BoostedBen · 70 0 Dec 14, 2022 New Hope, Alabama

Unless you have an expieranced hand rolocs are a terrible idea. Using a long board is the all-time quick way.

If your patient, the best slow way is a plastic scrapper, and a few razor blades, as well as some store towels and some kind of non residue forming solvent. Cheaper restriction cleaner will get out residuum. I prefer paint thinner (acetone).

bryanwheat

Some of y'all guys actually over complicate this. Go buy one of these for 2 bucks, scrape the old gasket off, clean the surface with acetone and install.

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