more likely one of the valves has cracked and dropped into the cylinder and that nailed the spark plug electrode or the otherway around, normally when chain gets so bad to do a valve its at least all exhaust valves on n14 engines ,, you buy a £1000 engine from a breaker with over 60k on it it wont be long before your in same boat again, only a fool would fit a prince engine and not fit new chain on it before putting in, cheapest option repair what you hve and also new chain kit and oil pup chain as well will do at least another 60k plus miles,, on top of this breaker tend to lie about mileages on engines they also off a warranty but when you read on its only if fitted by god and no nuts and bolts have been changed on it etc,, £300 in parts you would be back on road again
Posts by mike1967
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really have they got different hands on the valve grinding dolleys than us other folk, the best thing about the prince engine is the cam followers are not shimmed and the valve seats are a polished surface from the factory and 9 times from 10 dont even need to be ground ie lapped in, must admit if it was a vauxhall 1.7 cdti head then for sure take in to machine shop pay the £300 for a clean and re shim etc, i've been rebuilding these engines for years and lost count the amount of bent valves i have replaced very rarely need a skim on head surfaces very rarely really need to lap valves in as,, some stuff dont need to be done for doing sake
just used this company for first time link below for timing chain kit and head set and head bolts i also put new piston rings ie latest spec with nylon oil control rings and new bigend bearings and new conrod bolts etc done 300 miles so far running really well its going on rollers and mapped for power with decat towards end of week, nt a bad kit only thing i did do was use a genuine timing chain tensioner ie latest update genuine form bmw £53,, also the conrod bolts geuine ones were £1.09p each £2.70p for cam bolts piston ring set for all 4 was £70 ie latest type as used in N18 ns b series bmw engines, this car had a piston failure broken way due to timing chain stretched and keep driving it until it gave up excessive heat and oil use blocked the cat and the pressure had to go somewhere.
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all of the above is fairly common on turbo cars where owners just drive and never repair anything until it breaks, and low oil levels as well, we got two other cooper s on family and both done over 120k both run well both have 8k oil changes and timing chains every 50-60k and the main bit oil is kept at max point lazy lack of checking oil will cost in the long run, the car above is barely 58k
i do this sort of thing a lot buy something and then takes me hmmm well worst one was 14 months reckon sat there it bits, my last honda project that was a 6 months engine change lol, if only i used the word no to others asking me to do stuff for them i would have a easy life from being reminded i need to get on with this car or next cars from wife lol
i got a single car unit and do that trouble is things get a apart some last really big one and i ran into getting parts for it trouble so was sat there 3 months audi v6tfsi engine with heads and crank out pistons out take a few hours to get back in to it each time remembering what goes where and when can end up taking one step forward then have to take apart again because forgot something needed to go on before the rest of it, i do put all nuts and bolts in order with what came off on my Bench of under the rear of the car,, things we do to torment our lives with bloody old cars , not so bad with mini's as now every nuts and bolt etc so can put them in a box and play lucky dip lol
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