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Old 01-05-2011, 08:09 AM   #1 (permalink)
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Default timing belt broke, are my valves ok?

i have already asked this in another posting about hp problems i was having, but i figured new issue/new thread. I have a 94 samurai with a stock 1.3L 8 valve SOHC engine. I have read that this is a non-interference engine. my timing belt broke the other night on my way home. I spent the better part of yesterday trying to track down a belt and other parts i need for the engine. after ordering the belt i got under the hood and lined the crank and cam sprockets up to wait for the new belt. when i turned he cam, i heard a faint grinding sound and felt a good deal of resistance. is the information i found bad, and the valves are messed up? or is there something else that could be causing this?
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Old 01-05-2011, 08:39 AM   #2 (permalink)
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The Suzuki 8V, SOHC engine IS NON interference.

When turning the cam you WILL feel resistance, you're opening the valves and doing so against the valve springs which are trying to keep them closed, you may even find that the cam turns on it's own (does not stay where you put it), because of those springs.

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Old 01-05-2011, 08:46 AM   #3 (permalink)
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that makes me fell much better, but what about the ginding sound?
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Old 01-05-2011, 09:07 AM   #4 (permalink)
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I wouldn't comment on a grinding sound without hearing it - your idea of grinding might be my idea of a rubbing sound.

There's not much in the head to "grind" - the cam runs in three "holes" in the head - I say holes because there are no bearing journals, the cam runs directly in the aluminum head, and the lobes rub against the surface of the rockers - you have no oil pressure at this point so there is no lubrication (not that you need much).

Change the belt & tensioner, get the timing right and I'm sure you'll be just fine.
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Old 01-05-2011, 06:19 PM   #5 (permalink)
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fordem's right. There are some timing belt manufacturers out there that post false information on vehicles being interferance so that you are spooked into changing the belt every 60K miles. If you thought that your engine would be destroyed from a broken timing belt you would be more likely to change it frequently. The misinformation has found its way into the comunity and there are quite a few people out there now who think their engine is interferance when it is not. Not just samurais, I've had two other vehicles where the information from that timiing belt manufacturer listed it incorrectly.
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Old 01-06-2011, 09:56 PM   #6 (permalink)
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Quote:
Originally Posted by fordem View Post
The Suzuki 8V, SOHC engine IS NON interference.

When turning the cam you WILL feel resistance, you're opening the valves and doing so against the valve springs which are trying to keep them closed, you may even find that the cam turns on it's own (does not stay where you put it), because of those springs.
Well thats good to know that if the belt breaks you wont bend valves. Just changed my belt for prevenetive mait. Vehicle has 98,600 miles on it history Unknown I still feel a little more secure because a belt can ruin your whole day.
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Old 01-07-2011, 07:42 AM   #7 (permalink)
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Quote:
Originally Posted by firstsami View Post
Well thats good to know that if the belt breaks you wont bend valves. Just changed my belt for prevenetive mait. Vehicle has 98,600 miles on it history Unknown I still feel a little more secure because a belt can ruin your whole day.
absolutely, a busted belt can ruin your day. especially if it was the third day in a row you've had your vehicle in the shop trying to get it running right. though all of the issues i've had with my samurai have been small, they have been spaced out just enough to be a royal pain in my butt.
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Old 01-07-2011, 10:10 AM   #8 (permalink)
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With an older vehicle, you almost need a backup vehicle so you can take your time getting it in good running shape. Taking it to a shop gets pretty pricey. I put a new belt so that I could be confident with my vehicle, mine is an 83 thats 23 years old who knows if its ever been changed. Check all your brakes, are your hoses old cracking? I am guilty of blowing up an engine because of a heater hose blowing and not seeing my gauge until it was too late. With an old car you got to get familiar with every thing possible, otherwise just hope your lucky. You can catch many things befor they strand you. Have Fun!
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Old 01-07-2011, 10:20 AM   #9 (permalink)
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breaks are all in great shape. the front pads will get me well through the spring and possibly through the summer before i have to think about replacing them. all of the hoses are in great shape. the only issue i've had with the cooling system was when i changed the thermostat, i didn't tighten the housing enough hand had a very small leak there. there is a fair amount of body rust that i'd like to start working on this summer. hopefully, within a couple summers, i'll have her all the way back to her original glory.
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Old 01-09-2011, 07:14 PM   #10 (permalink)
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well, i got the timing belt on... no luck. she won't run. i can smell gas when i turn it over. and I've got spark. i need some ideas on what to look at.
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