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Hairy Beekeeper



Member Since: 16 Nov 2015
Location: leicestershire
Posts: 49
United Kingdom 1990 Defender 130 200 Tdi HCPU Aintree Green
Piston cleaning advice?
Here's a quick one,

before I start scraping and sanding, is there a better way of de-coking the pistons?
It's a 200tdi with the swirl chambers. Someone mentioned burning to me, I've seen it done to the exhaust manifold, but I think the heat may damage the ally.


I have a rebuild thread for those who are interested.
(can someone tell me how to find the link to it please?)

Cheers,
HB Currently rebuilding my stretched 110 (now 122) to personal spec, probably going to be a double cab dropside, but not fully decided yet. So I've started at the front end first!
http://www.defender2.net/forum/topic41658.html

"Sorry love, don't make me choose between you and my Lanny. You won't like the answer....."
Post #488410 4th Jan 2016 10:26am
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jimbob7



Member Since: 06 Jul 2013
Location: uk
Posts: 2055
Soda blasting if you have a compressor (Sand blasting with bicarbonate). Pov.spec,ftw. 2006, 110,TD5.
Post #488432 4th Jan 2016 11:18am
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Bumpymike



Member Since: 18 Nov 2015
Location: cheshire
Posts: 71
United Kingdom 1992 Defender 90 200 Tdi SW Bronze Green
Soak in warm water with soap powder over night - even better if keep it moving with a bit of compressed air.

We use to use this method on large bore Diesel engines ( 900mm) and turbo charger rotors.
Post #488466 4th Jan 2016 1:30pm
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alby



Member Since: 25 Dec 2014
Location: The Shire
Posts: 159
United Kingdom 2015 Defender 90 Puma 2.2 SW Santorini Black
^^^what he said, can confirm it works a treat. An industrial parts washer aka domestic dish washer works too!
Post #488476 4th Jan 2016 1:52pm
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Daisy90



Member Since: 01 Feb 2015
Location: Hampshire
Posts: 845
United Kingdom 2001 Defender 90 Td5 SW Alveston Red
Of your replacing the rings? Snap an old ring and it make s a great ring groove clearing tool Thumbs Up
Post #488536 4th Jan 2016 5:22pm
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Hairy Beekeeper



Member Since: 16 Nov 2015
Location: leicestershire
Posts: 49
United Kingdom 1990 Defender 130 200 Tdi HCPU Aintree Green
Thanks guys, I tried this method and was surprised at the outcome.

I placed the pistons in a large pan of soda water on my burner in the workshop and they came up a treat!



Click image to enlarge


HB Currently rebuilding my stretched 110 (now 122) to personal spec, probably going to be a double cab dropside, but not fully decided yet. So I've started at the front end first!
http://www.defender2.net/forum/topic41658.html

"Sorry love, don't make me choose between you and my Lanny. You won't like the answer....."
Post #489545 7th Jan 2016 11:08am
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