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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 08:41 PM.
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. )
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.
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 01:02 PM.
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!
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.
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