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Old 09-01-2013, 11:02 AM
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Stretch Stretch is offline
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Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Calling all petrol engine combustion gurus (M102 based qu)

G'day Folks,

Due to a slight mishap that I'd rather forget I've got my engine in bits.

I was wondering what has caused the amazing rock hard coke-like build up of crud in this engine.

I think it is probably due to a life of just going to the shops but just in case I thought I'd ask you guys if you think there might be a fuel problem too.

The pistons are pretty grotty =>



(Oil on piston is actually ATF - I'm soaking the muck off)

Oil scraper ring is also pretty clogged up - holes / slots in the ring are totally full of rock hard gunk



But the cylinder bores are still in good condition



Attached Thumbnails
Calling all petrol engine combustion gurus (M102 based qu)-m102_910-piston-gunk.jpg   Calling all petrol engine combustion gurus (M102 based qu)-m102_910-oil-scraper-ring-gunk.jpg   Calling all petrol engine combustion gurus (M102 based qu)-m102_910-cylinder-bore1.jpg   Calling all petrol engine combustion gurus (M102 based qu)-m102_910-cylinder-bore2.jpg  
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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