7 replies to this topic

[liswar2]

Hi there, what's the secret to removing carbon build up on the face of my Pistons,
They are out of the block,
Some Say soda blasting
Carby cleaner
Petrol and a scourer
White brush ?......

Any help or thoughts appreciated ,
Thanks in advance warren

[grumpy xu1]

I would definitely be hydro blasting them if it was me.

[LC-GTR-1969]

For what it's worth, I have used a product called seafoam to great success... I dont think this is easily obtained in australia anymore but it really does help as a quick method for de coking when the engine is still together... I realise that your slugs are out of the car but I thought it might be helpful to mention it to other people reading the posts.

 

I had heaps of carbon on my piston crowns and the sea foam cleared it right up- confirmed with my boroscope. 

 

I have made my own concoction similar to sea foam, which was a mix of diesel fuel, lighter fluid and a small amount of ATF. I used this on my outboard when it had gummed up and had a stuck ring (compression was down 50psi...). Once using my mix of products by soaking the crown then spraying through the inlet whilst engine running, I was able to free up the ring and it made the 150psi it needed in the affected cylinder. 

 

I cant remember the exact ratio I used but I have it written down somewhere if anyones interested..

[Redslur]

Nothing like a bit of elbow grease and a good cleaner like carby cleaner. I even wet and dry them for a nice finish on a flat surface.

[gtrboyy]

For speedy engine rebuilds we used to buff carbon off with wire wheel.

 

Old timers used to spray mist of water down carb to lift carbon off while engine was running...these days common to buy subaru upper cylinder cleaner & used that.

[LXCHEV]

For running engines - I've also been recommended (and have used) the Subaru cleaner mentioned above.

 

For engines that are apart - I wouldn't be too fussy - just use whatever technique works without damaging the parts. Carby cleaner/scotchbrite pads is what I'd be trying... worst case scenario the wire wheel.

[dattoman]

Leave it there... more comp

 

soak in top end cleaner for awhile