Question about 2003 Saturn ION

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Timing chain If the chain jumped time while starting the engine, would that have been enough to bend the valves?

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It depends if the valves are bent bad enough there will be lash on the rocker arms, the valve can't close now that it's bent.

Posted on Nov 22, 2013


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Posted on Jan 02, 2017

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SOURCE: heavy ticking from top of motor on 1998 sl2.

Check your oil first. I guarantee your car burns oil and it may be very low on low. The ticking may be a lifter starved for oil or one that has debris in or on it. The timing chain usually makes a "slapping" sound when it gets slack in it from lack of tensioner adjustment.

A sure fire way to check the timing chain if you are concerned is to take off the valve cover (also a good time to replace the valve cover gasket). Then you can see the chain and feel and see if there is any slack in it.

Posted on Jan 27, 2010

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I have a 2000 5,7 vortec while drivig it started to misfire and backfire and now it won't run acts like it jumped time

You probably lost the crank position sensor or the cam position sensor. Pull a spark plug and see if there's any compression. If it's jumped time you'll have reduced or no compression. If it jumps time enough it can bend all the valves in the engine. If there's plenty of compression then look at the sensors.

Mar 08, 2016 | Cars & Trucks

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95 caviler died while driving, now it will not start. Trying to start, it cranks real rough & catches hard. Any ideas?

If it has the 2.2L engine, and its has more than 60K miles on it, you may have had a timing chain jump. The tensioner for the chains breaks and allows the chain to jump time. They only last about 60-80K miles before this happens, and when it does, it usually bends valves in the head since it is an interference engine. GM knows about this and has done nothing to correct it. You need to do a compression test to confirm the problem. If it shows low compression on one or more cylinders, plan on a replacement or rebuilt head and a new timing chain set. Then either get rid of the car or plan to replace the chain tensioner every 50K miles to prevent it from happening again.

I speak from personal experience here, having had it happen twice on my daughter's 1997 Cavalier.

Oct 25, 2015 | Cars & Trucks

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What would make a 2002 2.2l cavalier turn over but wont start

If there is was no check engine light prior to the problem (which would normally indicate sensor problems), then I would suspect that the engine has jumped time. The 2.2L engines, although they have a timing chain and not a belt, had issues with the timing chain tensioner. This wars out, breaks, and allows the timing chain to jump across the gear teeth, putting the engine out of time. This will cause a no-start condition, and if bad enough, cause valve damage that will require the heads to be repaired. The easiest way to check for this problem is to perform a compression check of the cylinders. If the engine has jumped time, the compression in the cylinders will vary greatly from one cylinder to the next and will most likely be lower than normal.

Mar 19, 2014 | 2002 Chevrolet Cavalier Coupe

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What does the car do when the timing belt goes out

The 2001 Cavalier does not have a timing has a chain. That being said, the tensioner for the timing chain is a common failure item. If the tensioner fails while the car is at speed, the timing chain will jump across the crankshaft teeth, putting the crankshaft and camshaft out of synchronization. This will cause the car to immediately shutdown, the pistons in the engine will come up and hit and bend the valves, resulting in internal damage to the engine.

Feb 14, 2014 | 2001 Chevrolet Cavalier

1 Answer

Cannot get 1,8 ohv engine to start. jumped time so I followed book to the letter to line everything up to retime it. Still won't start. got spark no start

If by jumped time you mean that the timing chain or belt was bad, resulting in the camshaft being out of time, your first step should be a compression test; presuming everything is correctly installed and timed. Many engines are not free- wheeling (having valve clearance the prevents pistons from hitting valves that are open at the top of its stroke), and once the camshaft goes out of time pistons start hitting and bending valves. I do not know whether your engine is or is not free wheeling.

Aug 06, 2011 | 1991 Subaru Loyale

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The Chrysler 2.7 is an interference engine which means that the piston can go up far enough to hit the valves and bend them. The car would need to be inspected and the timing will have to be calibrated again by a dealer or mechanic after the chain is replaced.

Mar 11, 2011 | 2002 Chrysler Sebring

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How do you tell if an engine has jumped valve timing (not ignition timing)?

Essentially, since the valves and distributor are both driven by the camshaft (via the timing chain), both are equally affected by anything that happens to the chain. Chains don't actually "jump time"
but most often will stretch out and cause the cam and distributor to lag behind the crankshaft so the pistons are out of phase with them. That causes lower and lower actual compression and later and later spark, resulting in poor power output and in extreme cases, a piston can actually touch and bend a lagging valve. If an engine is fitted with an aluminum cam gear, the gear teeth are nylon. As the gear turns, an excessively worn chain will ride up and strip off the teeth.
The best way to check is to remove the valve cover and watch the rocker arms on #1 cylinder. Both valves should be completely closed when the engine is turned to the top dead center (0) position on the timing scale and the distributor rotor should point to the #1 tower on the distributor cap. (will also point exactly 180 degrees away from it if on the exhaust stroke)
Very low compression readings in all cylinders and a rotor that "stutters when the engine is cranking are other common symptoms)
If you have those symptoms, the next thing to do is remove the timing case cover and look at the chain. if the engine has 200K miles or better, I'd replace the chain, as at that point, most chains have sufficient wear to justify replacement even in engines that seem to be running well.
This answers your question but may not solve your problem as your post leads me to believe there is something other than a valve timing issue going on there.

Feb 08, 2011 | 1990 Jeep Wrangler

1 Answer

Driving down the highway and car died. Have gas yes. Spark? Do you think timing belt or chain broke? How do I find out?

To check timing belt or chain, remove distributer cap and turn engine over. BRING TO TOP DEAD CENTER AND SEE WHERE THE ROTOR IS POINTING, #1 cylinder? IF NOT SPEND ENGINE ONE TURN, pointing at #1? If not then you may have jumped time. Take a scoket that fits the crank and turn the engine by hand. The rotor should start turning right away, the mor you move the engine without movement of the rotor shows slack in chain or belt.
Another possiblity is that you might have a crank sensor gone bad. Check for fire at the spark plugs. Take one out and, while the plug is laid on the engine, spin the engine, it should it should spark. Either way shows that the engine is not firing. Next is to do a compression check, ther should not be more than 10% difference between the cylinder. If no compression, you have an interfearance engine and jumping timing will bend the valve. Hope this helps.

Oct 31, 2010 | 1993 Volvo 940

1 Answer

Out of time dont start

If you are sure that the engine is out of timing, better not try to start it until timing is fixed. Most overhead cam engines will bend or crack the valves/lifters if the timing chain has jumped a few teeth.

Jun 27, 2010 | 1993 Nissan Altima

1 Answer

1999 pontiac sunfire-timing chain jumped

Is the motor still running???? All depends where the piston an valve are when it jumps off?????

Nov 19, 2008 | 1999 Pontiac Sunfire

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