I was unfortunate to have a timing chain break at 30 miles per hour. apparently it bent the valves had it repaired at a local garage drove it forty miles it broke down now the garage tell me the big end has broken and it will be cheaper to fit a recon engine. Surely I should not be expected to pay again for the engine to be fix!
Not good. I would expect the garage to foot this expence as Im sure your initial bill was far from a cheep one? If a customer of mine had suffered a similar issue, I would certainly work very closely with them to rectify the problem. There is of course a slim chance a catastrophic component failure has genuinely occured, which may be completely unrelated. However it is most unlikely this time, as when your timing chain failed the valve to piston collision/impact would have caused serious potential damage to the crankshaft and big end bearings. This symptom is not overly common in most engines where timing chain/belt failure occurs. However, all engines are different and may experience different levels of damage. A replacement engine does now seem the cheepest way forward in your situation. Perhaps the garage should source one and you might pay for the fitting only? Good luck
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check the timing cover
if it is plastic , it will be a belt drive and you could be lucky
if it is metal , it will be a chain and it is an intereference engine which means bent valves
because yo have failed to include details like twin port , car model , year (Remember corsa bakkie are american nome only) it is difficult to be exact with the answer
There is, in fact, a timing chain on your car. Unfortunately, the Altimas around this year have issues with stretched chains. This car probably should not be driven. If the chain breaks, you will destroy your valves and need to get your head rebuilt. The parts for this repair can be had for under 100 dollars, however, the labor involved is quite a lot. I was quoted $1000.00 for the job and thought it was too much until I got into it. Very time consuming and not for a beginner mechanic. If you know someone who is a VERY good mechanic, maybe they can give you a break on the labor.
The internal damage is always the main worry with a broken timing chain, bent or broken valves, damaged valve stems and seats, I have even seen broken rings and split pistons and snapped camshafts, if the chain has stretched and the timing has jumped a couple of teeth you may be lucky, but you shouldnt turn the engine over even by hand until you find out the root of the problem, any damage may be increased tenfold. Unfortunately the timing cover will have to be released to find out before you do anything.
Pull the valve cover and see if the timing chain is broken. Pretty common with engines that have higher miles or less than ideal oil change intervals.
If the chain is broken it bent valves. Your better off with a low mileage used engine
You may be in luck! your engine may have a squash plate on the heads. This will keep the valves bending. Put the new chain on it-MAKE SURE THE TIMING MARKS LINE UP! Then do a compression test to be sure. I've had a timing belt break at 10 miles over the "suggested " change mileage, and that plate save the day.
Are you replacing a broken timing belt? Or are you replacing a belt because it's due by miles? If the belt is broken, i strongly suggest inspecting for bent valves. Daewoo is notorious for bending all valves and breaking valve guides in the cylinder head when the timing belt breaks. The broken belt is also common.
When the timing chain breaks the cam quits turning. Any valves that are open, remain open.
If the motor is turned over trying to start it or bump starting it in gear, the pistons come up and
hit the open valves. Bent valves are common. If it is a 4 cylinder only a couple valves will be open
at a time so you may damage 2 or 4 (there are usually 2 per cylinder so a 4 cylinder has 8).
You could replace the chain, make sure the timing marks align with eahother and the chain but
just getting the cam and crankshaft to alignment could cause some damage. Good luck. I did
it to mine once. Bent 4 of the 8 and had to pull the head, sent to the machine shop and reassemble.
I tried to bump start mine down a 2 mile hill. Ohh well! It's fixable.
It's not uncommon for the timing belt to break or "come off the guide" with that many miles on the vehicle. Unfortunately if the engine was running when this happened it may have caused severe damage as in a bent valve or worse yet a hole in the top of a piston from a valve hitting it.