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Thread: Cylinder Head Cleaning

  1. #1
    Legendary dom14's Avatar
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    Cylinder Head Cleaning

    Hey Guys,

    The cylinder head that I'm rebuilding atm is pretty dirty as in the picture.

    Can you please suggest some el cheapo cleaning methods/cleaning chemical?
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    Expert billyj's Avatar
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    take head and slab of beer to local cylinder head/enginereco shop. trade beer for putting the head through his hot tank.

    short of that, completely dismantle and with a large container several stiff bristly and wire burshes start scrubbing with petrol, on tough spots try brake cleaner or acetone

    but its a really shitty messy job so really recomend the above method, the simple fact is you are going to need a shop to crack test and surface the head anyway so may as well let their hot tank do the dirty work
    Last edited by billyj; 19th July 2017 at 07:41 PM.
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    dom14 (19th July 2017)

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    Patrol God nissannewby's Avatar
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    Hot tank as above. Even if they charge you its only gonna be $50-$80

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    dom14 (19th July 2017)

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    Legendary dom14's Avatar
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    Quote Originally Posted by nissannewby View Post
    Hot tank as above. Even if they charge you its only gonna be $50-$80
    I'm super tightarse atm I wanna get it done for couple of peanuts.
    RB30, some 2-3 inch lift auxiliary LPG tanks
    Few more mods on the way
    http://www.worldwildlife.org/species/tiger
    https://www.panthera.org/
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    Legendary dom14's Avatar
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    Quote Originally Posted by billyj View Post
    take head and slab of beer to local cylinder head/enginereco shop. trade beer for putting the head through his hot tank.

    short of that, completely dismantle and with a large container several stiff bristly and wire burshes start scrubbing with petrol, on tough spots try brake cleaner or acetone

    but its a really shitty messy job so really recomend the above method, the simple fact is you are going to need a shop to crack test and surface the head anyway so may as well let their hot tank do the dirty work
    I'll be crack testing it myself with a home made gadget. I'll be 'machining' it myself using a homemade setup as well. Only thing that will stop me DIY at home will be the cracks. If there are any cracks, then I won't have time to muck around trying to repair cracks backyard DIY method.(But, I will be attempting it another time. )

    Cheers
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    Ok im curious, Unless you have a mill sitting in your shed how are you going to accurately machine the head?

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    Legendary dom14's Avatar
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    Quote Originally Posted by johno90 View Post
    Ok im curious, Unless you have a mill sitting in your shed how are you going to accurately machine the head?
    Just like the way demonstrated in below short video.

    https://www.youtube.com/watch?v=mc_gaGAf2pk&t=48s

    For a six cylinder, you will need a thicker glass with a slightly stronger table. A piece of thick glass you can pick up for nothing online.
    Just make sure the glass is flat using a metal ruler and a feeler gauge, both before and after fitting the glass on the table.
    It's a kinda bench sanding setup you can use for many other projects, not just for the cylinder head machining.

    This guy uses a flat piece of sanding block made out of thick flat piece of plastic or veneered MDF, etc, but I prefer the above glass table method 'cos
    it uses the weight of the head and also the whole head moves against the sanding table, producing a more accurate flat machined surface with less physical effort.

    https://www.youtube.com/watch?v=HyKN52HD6RU&t=42s

    https://www.youtube.com/watch?v=SK2R2LdkLKs&t=1152s

    Only thing that cost me money was the few sandpapers & the glue to stick the sandpapers onto the glass. Thick glass and table was picked up from the side of the road from somebody's hard rubbish.(One person's rubbish is another person's treasure, I guess. )

    The above cylinder head surfacing method using a glass table is pretty easy thing to do with cylinders heads upto 4 cylinders. Six cylinder ones are slightly heavier and longer, but still doable without much dramas. The glasses are usually perfectly flat, but you still wanna make sure by using a ruler & a feeler gauge on it. And of course use the ruler and feeler gauge on the cylinder head once the machining is finished to make sure it's come out good.


    You'll be amazed that even the visible cracks can be repaired using JBWeld. How long that fix would last is something I don't know as I haven't done it yet.
    But, it's been successfully done on motorbike and other small engine cylinder heads.

    Cracks can be patched up with TIG aluminium welding as the professionals do, but you need to be good with TIG welding.
    Grinding and polishing can be done with grinding/polishing bits with an air or electric grinder/drill.
    Last edited by dom14; 7th August 2017 at 12:02 PM.
    RB30, some 2-3 inch lift auxiliary LPG tanks
    Few more mods on the way
    http://www.worldwildlife.org/species/tiger
    https://www.panthera.org/
    Cheetah Outreach

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    Legendary Rossco's Avatar
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    I have seen that video and seems to work with an aluminum head, would that technique work with a cast iron one?

    Sent from my GT-I9506 using Tapatalk

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    Expert johno90's Avatar
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    Yea glass works with cast or alloy, have done it in the bush before but ill promise you that you will be blowning gaskets after 15,000km easy or less!
    Its not only about the surface being flat but the texture and cut pattern also come into it - a good example is different bore hones and grades to suits what rings your using.
    Good on you for giving it ago but for the $300 it would take to hot tub it and fly cut it, its not worth all the hassle and future repairs.
    Do it once properly otherwise it will cost more anyway!

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    Legendary dom14's Avatar
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    Quote Originally Posted by johno90 View Post
    Yea glass works with cast or alloy, have done it in the bush before but ill promise you that you will be blowning gaskets after 15,000km easy or less!
    Its not only about the surface being flat but the texture and cut pattern also come into it - a good example is different bore hones and grades to suits what rings your using.
    Good on you for giving it ago but for the $300 it would take to hot tub it and fly cut it, its not worth all the hassle and future repairs.
    Do it once properly otherwise it will cost more anyway!
    You can use fine grit sandpaper that costs next to nothing. If the gaskets blowup at around 15000km, then something's not done right.
    For additional insurance, you can use a product like below.

    https://www.autobarn.com.au/vht-copp...et-cement-sp21

    Make sure to spray it on the gasket, never on the head or block. Let it dry for ten minutes or so before placing the head gasket on the block.

    You can use a WD40 or something similar to get a superfine smooth surface(spray it on the sand paper), if a superfine smooth surface is a concern.

    People have done it with heads upto 4 cylinders with success. I am yet to find out the success with my six cylinder head, but I am pretty confident.

    Quote Originally Posted by Rossco View Post
    I have seen that video and seems to work with an aluminum head, would that technique work with a cast iron one?

    Sent from my GT-I9506 using Tapatalk
    Yes, I used the same table(with gritter sandpaper) to machine the stock exhaust manifold. It came out pretty good.
    RB30, some 2-3 inch lift auxiliary LPG tanks
    Few more mods on the way
    http://www.worldwildlife.org/species/tiger
    https://www.panthera.org/
    Cheetah Outreach

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