Question about 1995 Dodge Neon

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Timing belt how can i tell if my valve piston is bent . i just did the timing belt theres no pressure going through

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Hi I am vortash ,,the easiest way is to do a compression test , providing you are sure that you have the belt on correct .. and you have turned the engine over by hand using a socket and ratchet on the main crank nut .. to make sure you can't feel anything coming into contact with the pistons turning it very gentley .. remove a plug screw in the testor and turn the engine over the reading should be if it is the coloured type without numbers in the green of course .. if it is numbered readings between 130 and 160psi is fine and will indicate your valves are ok but any lower than say 110 or below it will most likely mean that there is damage .. some cars are actually designed to be impervious to cambelt snaps and the pistons and the valves dont meet these are called safe heads .. check to see if yours is a safe head in your service manual you may be lucky .. regards Vortash

Posted on May 20, 2009

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Posted on Jan 02, 2017

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How good a mechanic are you? Do you have the tools?
When you crank it, does it sem to spin real free with no wump wump sound? Then it's likely busted timing belt.
The 2.4 Liter engine is an interference motor, meaning if the timing belt breaks, the intake and or the exhaust valves in the engine hit the top of the piston and damage the valves. When this happens the valves are bent enough that they will not close tight and the engine will not start,, now it may sound like it wants to start because there maybe only a few valves that are bent, and in the cylinders that have the bent valves there is no compression, but in the other cylinders the valves are working normal and these cylinders may try to start like normal. The only trouble is the only way to correct this problem is to remove the cylinder head and have a machine shop inspect cylinder head and replace the valves that are damaged. The top of the pistons that are hit by the valves should also be inspected as pistons maybe damaged as well. You can verify a no compression condition by removing spark plugs and with a compression gauge, check the compression of each cylinder, the ones with no compression more than likely will be the ones that have the bent valve problem, on most four cylinder engines there will be two cylinders without compression, the other two cylinders may have a normal compression reading.

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