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Most likely you have a bent valve, Was she running when the belt broke? You can call a good Dodge dealer and ask if that engine bends valves when the timing belt breaks.Most likely you have a bent valve, Was she running when the belt broke? You can call a good Dodge dealer and ask if that engine bends valves when the timing belt breaks.
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Have you put each cylinder at top dead center on compression
stroke & done a cylinder leak down test BEFORE ever starting
the motor,& is the timing belt still on & timed correctly?
Compression is relative to many things & not much use these
days,you got it or you don't
The engine can't run without compression in the cylinders. The plug will still spark, but without a compressed air/fuel mixture to burn and power the cylinder down, the starter will just keep spinning the engine over, cranking forever and not starting. Check if your timing belts are good and not broke. Cylinder compression is dependent on good piston rings, intake and exhaust valves that open and close at right times and that seal good when closed, and a head gasket that seals up the cylinder from leaks where compression could blow into the water passages, or oil passages, or to outside of engine. If the timing belts are good, a leak-down test of each cylinder will pinpoint where compression is lost. Good luck with the Sube, great cars, great engines, but the head gaskets are a common problem.
Most likely the valves were bent. When you attempt to start the motor does it turns over a bit fast and will not sound quit right - Not even attempt to spark up or fire up. Check engine cylinder compression. The valves were bent when the belt broke. you will 1. check compression (and when it fails) 2. decide to have the head checked and if possible rebuilt (use new head bolts) or 3. Look for and buy a low milage used motor or 4. Look for a rebuilt head
Can stop cranking. With compression figures that low, it will never start. Are you sure the figures are accurate? Throttle wide open when cranking up pressure? Compression has to be at least 100 psi for the spark to ignite the mixture. If the belt broke while engine was running, and if it is an interference engine, you may have sustained some bent valves, internal damage to one or more cylinders, but not, I don't think, to all cylinders. I don't understand how you are getting such low compression on all cylinders Those figures sound like both head gaskets are failed, or the timing is way off. Review your timing procedure and recheck compression. Something is definitely wrong. Hope you can figure it out. Good luck.
Are you sure it was timing belt? If so. When you crank the engine, does it turn kinda fast without making a wump wump sound? When the timing belt broke it may have done some hidden damage. Its possible it may have bent the valve stems by piston hitting them because the timing to move them was off. You need to perform a compression test on all cylinders. Borrow or rent a compression gauge from an auto parts store. They will tell you how to use it, what to look for. If compression is bad, you may have to remove the cylinder head and have a valve job done. Except that you need to replace some of the valves. This calls for some skill or at least good apptitude in mechanics. OR somthing did not go right with the timing belt install.. Thats all I can do for you now. Check the compression. Good luck.
Remove the spark plugs and run a compression test. I'd guess you will have low-to-no compression. Two likely causes: 1: you did not get the crankshaft and camshaft correctly aligned when you put the new belt on. If this is the case, all cylinders will have about the same compression, but will be very low. Are you absolutely sure that you got the timings marks correct when you put the belt on? 2: the valves were damaged when the belt broke, open valves and pistons coming up. Talk to the parts department of you local Chrysler dealer, and ask if this engine has "negative valve clearance". If that's the case, you will need to pull the head and have the valves repaired. In this case, a few cylinders may have good compression and a few others may have low-to-no compression.
Of course it it also possible that you failed to connect something when you put it back together, and you are not getting spark or gas. Test for that first.
It is possible to set the timing wrong....if the belt broke well running I believe this is an interference motor..meaning if the timing is off the cylinder can move up and smack a Valve being exhaust or intake. which means a valve can break or bend cause lack of seal thus no compression. When setting the timing you want to align your marks with Cylinder # 1 it needs to be on the compression stroke..you can do this by removing cyl 1 spark plug and rotating the crankshaft with your finger over the spark plug hole you will feel air press against your finger meaning all valves are closed and your in compression stroke. Then line up your marks and you should have it...I would consider purchasing a compression tester to make sure no damage to the cylinder head....good luck hope this helps
Most likely you have a bent valve, Was she running when the belt broke? You can call a good Dodge dealer and ask if that engine bends valves when the timing belt breaks.
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