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Cylinder head cleaning

Posted by gregwni

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Cylinder head cleaning #1
gregwni Greg W Belfast, Northern Ireland, United Kingdom	Posted: March 28, 2012 03:46PM Registered: 1 year ago Posts: 237

Anyone got any tips on the easiest way to clean and decarbonise my cylinder head and assosciated "bits"?

Its out of the car now - ive had a bit of a go with alloy wheel cleaner so far to remove some of the carbon, but , not sure whether to risk a "drill powered wire brush" on the valves and so on?

Any advice appreciated!

(i know i can take it to a garage for a dip, but would like to be able to do it at home)

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Re: Cylinder head cleaning #2
dhcoleago David Cole Magnolia, AR, USA 1975 Triumph TR6 1977 MG 1100	Posted: March 28, 2012 03:53PM Registered: 2 years ago Posts: 171

The wire brush on a drill will not hurt it a bit. A small wire brush on a dremel tool for getting the seat and underside of the valve. After a few hundred explosions per minute while running, a wire wheel will feel good to it.

David

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Re: Cylinder head cleaning #3
gregwni Greg W Belfast, Northern Ireland, United Kingdom	Posted: March 28, 2012 03:56PM Registered: 1 year ago Posts: 237

Thanks David - so - just in case i got this wrong - you think im fine to go under the valves (the seats) with it ? (will make life easy!)

Oh and what about the flat surface of the head itself? Would a wire brush be ok on that?

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Re: Cylinder head cleaning #4
gregwni Greg W Belfast, Northern Ireland, United Kingdom	Posted: March 28, 2012 05:23PM Registered: 1 year ago Posts: 237

I also discovered some rust inside the inlet ports - (right the way in i think). Rest of the head looks ok though.

What should i do ?

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Re: Cylinder head cleaning #5
j-blueridge Jamie Bourland C'ville VA, USA 1968 MG MGB GT "Antichrist"	Posted: March 28, 2012 06:07PM Registered: 8 years ago Posts: 647

There are all sorts of relatively gentle liquid rust removers around these days: Evapo-Rust comes to mind. You can also poke around on the Eastwood Company's auto restoration website. They have all sorts of solvents and paints and things. www.eastwood.com

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Re: Cylinder head cleaning #6
britnfrenchy2 Giles Gervais Hemet, Calif., USA	Posted: March 28, 2012 07:05PM Registered: 2 years ago Posts: 3

Gil here thewire wheel on a bench grinder works real well just be gentle with the valves so they don't get pulled in to the wheel also the wire brush attachment that is for the drill motor is used to clean out the valve seat area. There are different sizes. You can also use this for the combustion areas on the cylinder head

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Re: Cylinder head cleaning #7
Ogre1 Allan Ogilvie Melbourne Victoria, Australia 1977 MG MGB "Greenb"	Posted: March 29, 2012 01:34AM Registered: 2 years ago Posts: 1,339

In reply to # 2025095 by gregwni I also discovered some rust inside the inlet ports - (right the way in i think). Rest of the head looks ok though.

What should i do ?

Leave it where it is. Once the head gets in regular use the rust will go. In the inlets it will get covered in petrol so it won't rust any further.

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Re: Cylinder head cleaning #8
gregwni Greg W Belfast, Northern Ireland, United Kingdom	Posted: March 29, 2012 12:57PM Registered: 1 year ago Posts: 237

Thanks Allan - do you think its worth taking the rough of it out or is there no point?

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Re: Cylinder head cleaning #9
Ogre1 Allan Ogilvie Melbourne Victoria, Australia 1977 MG MGB "Greenb"	Posted: March 29, 2012 05:02PM Registered: 2 years ago Posts: 1,339

Greg the rough aids turbulence that adds to better flow. Leave the rough alone. Even after a head has been ported the ports are roughed up a bit for that reason.

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