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Join Date: Aug 2014
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Isuzu Amigo Timing

08/04/2014 1:25 PM

Car died on highway. Tried starting sounded like starter was the only thing turning. Checked evrything that i could in dark even turned crank shaft with wrench. Pulled timing cover back, belt loose. Next day took it apart found pulley busted changed both pulley, new belt. After putting all back together same sound. Starter spinning what could cause that and is that why pulley broke.

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#1

Re: isuzu amigo timing

08/04/2014 1:34 PM

How many miles on it? 4 or 6 cylinder? Has timing belt ever been changed (before now)? This is probably an interference engine, so you may have major damage. But the first thing I'd do is see if the starter is turning the engine.

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#5
In reply to #1

Re: isuzu amigo timing

08/04/2014 3:22 PM

130000 miles, 4cylinder, not sure, who ever had it before me did take care of it. after researching yes it is a interference engine. I will check starter like you said. I've not had to work on cars in fifteen years, not afraid to take anything apart and never have left overs "lol" when i put it back together. need all advice I can get. Thank you for your help

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#10
In reply to #1

Re: isuzu amigo timing

08/05/2014 7:19 AM

Perform a compression test if compression is not reading pull the head.

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#2

Re: isuzu amigo timing

08/04/2014 1:52 PM
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#3

Re: isuzu amigo timing

08/04/2014 2:28 PM
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#4

Re: Isuzu Amigo Timing

08/04/2014 3:16 PM

its a 2.2l 2000 130,000 miles bought it 1yr ago who ever had it last took care of it. yesterday research it and it is a inter--- I did a no no and put in gear and turned key and it jerked. took it all apart again to check timing marks not sure on crank mark its just a little dent on it that I believe is mark after checking on youtube saw same mark on other Isuzu amigo.

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#8
In reply to #4

Re: Isuzu Amigo Timing

08/04/2014 4:18 PM

That's a shame.... I guess you have your work cut out for you...good luck

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#6

Re: Isuzu Amigo Timing

08/04/2014 3:40 PM

Timing Belt and Pully issues aside for a moment. If it "sounded like starter was the only thing turning", (i.e. the starter motor runs but the engine is not cranking), then the crankshaft may be broken at the flywheel connection. The starter gears must still be intact due to the fact that the car lurched in gear when you tried the starter again.

Now if the timing belt slipped enough, it may have caused the pulley to fail, and it is highly likely that the engine is toast from running the valves into the pistons.

Not a diagnostics expert, but you may want to plan for the eventuality that this engine must be pulled and rebuilt/replaced.

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#7
In reply to #6

Re: Isuzu Amigo Timing

08/04/2014 4:07 PM

when he threw the belt he crashed the piston faces

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#9

Re: Isuzu Amigo Timing

08/05/2014 4:48 AM

Assuming for the moment that you have got the timing belt on correctly, then do a compression test on each cylinder, I think you will find out that one or more cylinders have no compression anymore due to bent valve stems....(already mentioned)

If no compression, then take off the cylinder head and inspect damage. You could have a need to replace most of the valves.

Hopefully the pistons have survived, maybe with a few dents, but that should not be a problem. Hopefully the crankshaft is OK, but that is more difficult to test, maybe someone here had a method to check that out, but in all the years, I personally have never seen a bent crankshaft from such a problem...Cylinder head generally also survives....with dents maybe....

The problem was probably caused by the previous owner had never had the timing belt replaced when it should have been. On some engine types, the pulleys and the tensioner must also be replaced. Also, I don't know the mileage at which it should be done for your engine, that will be in the service manual. Generally at or before 80,000 miles as a general rule in my experience....

Two points:-

1) Never buy a car that has not had this item replaced when it should have been, only if its REALLY cheap, but get it towed to the service station for a fully replacement, never drive it there after a purchase....look at the service book at to when and if!! Get the price down if it cannot be 100% documented that it was correctly done at the correct time, or go and buy a different car, from another source!!

2) Really good modern (and really old cars too!) had a timing CHAIN, they are the better buys. Timing belts are just a way for the service station to make extra money....they can actually break at any time with no warning (seldom). The TDI diesel engines from VW are so badly designed, that a broken water pump can write the engine off as it is on the same toothed belt.....always replace water pump together with the belt and tensioner on these engines at the correct mileage (120,000 Kms or around 80,000 miles) or before.

I hope this helps....

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#11
In reply to #9

Re: Isuzu Amigo Timing

08/05/2014 10:00 AM

Agreed, timing belts are bad enough at the best of times, but to use them when major engine damage happens on belt failure beggars belief, IMHO.

I had one fail on a Vauxhall Cavalier some years back, non-interference so OK, but it was at moderate mileage and company car so all the maintenance done (or paid for, at least!)

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#12

Re: Isuzu Amigo Timing

08/05/2014 10:19 AM

"Recycle. The possibilities are endless."

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#13

Re: Isuzu Amigo Timing

08/05/2014 1:14 PM

Are you sure that the timing belt was put on correctly? If in doubt, remove no 1 spark plug, turn crank clockwise [normal direction] while carefully feeling the piston move with a screwdriver, turn crank until piston is at top dead center; The distributor rotor should now point ar No 1plug lead terminal and with the tappet cover off the no.4 cam lobes should be in the position where the exhaust valve is just about closed and the intake valve just about to open. If that engine does not have a spark distributor you have to make sure that no 1 piston is at TDC on compression stroke and not at the end of exhaust stroke!

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