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Hi! Yeah - basically what the thread title says... What do these fellas want to tell me?  Cylinders: 4 - 3 - 2 - 1 I'm especially concerned about A) the rusty bit on 2 & 3 and B) the green-ish colourisation on 2 & 1. Engine is a 1275cc A-Series w. carb, tuned to MG Metro spec. Plugs are BPR6ES. Engine has done a fair few miles now... Plugs were pulled after a normal drive through town. Any pointers appreciated!  Thanks! Cheers, Jan |
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Has it stood for a while? When were the plugs last changed?
Oxidisation can do that...
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It's stood over winter,maybe 3-4 months? But it's running since end of March. Plugs are from summer last year,so not 'that' old. I guess they'v done 8 to 10k miles? Car gets run daily for at least 15-20 miles |
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It's probably from where they've been sat, copper does turn green when it oxidises... Which from the state of the thread, it definitely has. Was it stood outside by any chance?
Personally, even if it's running ok, I'd change them for peace of mind and check again in a couple of months...
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Yes, it's stood in the carport. Thanks for your opinion! I was planing on changing them soon. Cheers, Jan |
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rodney
Posted a lot
https://www.facebook.com/RD-vehicle-transport-and-recovery-services-525622614268010/
Posts: 1,677
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id change em very soon!,
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facebook: rodney dean / rd transport  |
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Changed the plug today, runs a lot smoother now. However, cylinder 2 & 3 are down at only 7-7.5 bar (1 & 4 have 10+)... Bummer. I'm going to adjust the valves and try again tomorrow, but I guess the head gasket is a bit knackered... Oil in the bore doesn't change the compression, so at least I can hope it's not the piston rings Cheers, Jan |
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murran
Part of things
Posts: 610
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yeah, i was guna say looking at the greyish colour and corrosion of plugs 2+3 they might be burning a touch of coolant.
particullaly no.3.
not really surprised at the lower compression in them two. the valve seats (exhaust esp.) will be pitted and not sealing very well.
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Update: the worst case scenario happend........ Water ran down the bores and wrecked them...   Oh the curse word... Cheers, Jan |
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bl1300
Posted a lot
Posts: 1,678
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Very unlucky their. Is it possible to rebore and fit oversize pistons or is it scrap?
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Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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Rebore yould be possible, sure. But I've got another engine with about a third of the milage ready. So I'll just swap the engine for another one... Still a bit annoying, as I'm not in the mood for oily fingers... ;D |
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What!!! Where did this water come from! Surely not the coolant.
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1974 Lancia Beta Saloon
1975 Mazda 929 Coupé
1986 Mazda 929 Wagon
1979 Mazda 929 Hardtop
1982 Fiat Argenta 2.0 iniezione elettronica
1977 Toyota Carina TA14
1989 Subaru 1800 Wagon
1982 Hyundai Pony 1200TL 2-dr
1985 Hyundai Pony 1200 GL
1986 Maserati 425 Biturbo
1992 Rover 214 SEi 5-dr
2000 Rover 45 V6 Club
1994 Peugeot 205 'Junior' Diesel
1988 Volvo 760 Turbodiesel Saloon
1992 Talbot Express Autosleeper Rambler
2003 Renault Laguna SPEARS OR REAPERS
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murran
Part of things
Posts: 610
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aslong as their not scored etc they look like they'd probable hone up. did you have a look at the valve seats?
if you have another engine then whack that in.
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What!!! Where did this water come from! Surely not the coolant. I have no other idea of where it could've come from, as only the inner two cylinders are damaged, right where the gasket looks like it let go (discolouration)? aslong as their not scored etc they look like they'd probable hone up. did you have a look at the valve seats? They are too worn out for a re-hone, I guess. There's a feelable ridge on top of the bores where the top piston ring ends... The water marks a feelable as well with the finger nails. Didn't check the valves - the engine needs to last a couple more miles before it get's it's retirement. No time to swap engines right now... When I have the time, the head gets a rebuild anyway. Compression went up by 1 bar with a new gasket. That'll do for some more miles... Thanks everyone! Cheers, Jan |
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bl1300
Posted a lot
Posts: 1,678
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What!!! Where did this water come from! Surely not the coolant. Well unless there was water in the fuel, or the car has a water spray fitted coolant is the only thing it can be. |
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Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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Looks like it was just a duff old gasket. Did the head clean up okay? --Phil *I was going to say at the top that the paint had come off plugs 1 and 2, overspray from BL but eh  |
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I've never heard of a leaky head gasket ending up destroying the bores before.
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1974 Lancia Beta Saloon
1975 Mazda 929 Coupé
1986 Mazda 929 Wagon
1979 Mazda 929 Hardtop
1982 Fiat Argenta 2.0 iniezione elettronica
1977 Toyota Carina TA14
1989 Subaru 1800 Wagon
1982 Hyundai Pony 1200TL 2-dr
1985 Hyundai Pony 1200 GL
1986 Maserati 425 Biturbo
1992 Rover 214 SEi 5-dr
2000 Rover 45 V6 Club
1994 Peugeot 205 'Junior' Diesel
1988 Volvo 760 Turbodiesel Saloon
1992 Talbot Express Autosleeper Rambler
2003 Renault Laguna SPEARS OR REAPERS
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I've seen one kill a head same way though. Gasket failed (or was defective) between 2 pots - no idea how long it had been driven that way - but there was erosion for want of a better word of a passage or channel between the to adjacent cylinders. Darndest thing.
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Last Edit: Jul 8, 2011 19:08:21 GMT by akku
1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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'I woke up with a massive erosion'
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1974 Lancia Beta Saloon
1975 Mazda 929 Coupé
1986 Mazda 929 Wagon
1979 Mazda 929 Hardtop
1982 Fiat Argenta 2.0 iniezione elettronica
1977 Toyota Carina TA14
1989 Subaru 1800 Wagon
1982 Hyundai Pony 1200TL 2-dr
1985 Hyundai Pony 1200 GL
1986 Maserati 425 Biturbo
1992 Rover 214 SEi 5-dr
2000 Rover 45 V6 Club
1994 Peugeot 205 'Junior' Diesel
1988 Volvo 760 Turbodiesel Saloon
1992 Talbot Express Autosleeper Rambler
2003 Renault Laguna SPEARS OR REAPERS
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Thanks! 
