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What could it be? Car died. I lost all compression on all 4 cylinders in my car ?

This is a 2000 Dodge Neon 4 CYL 16 valves,SOHC engine. Ok. On oct 1st I was driving about 60 mph for about 6 minutes after leaving my house in the morning I heard a noise that sounded like a pulley belt then the car turned off, pulled over to a parking and checked to see if a belt broke and they both were there. I checked the timing belt still on. try to start it and the timing belt look to be ok and turning. I did notice that when cranking it sounded weird like it had no compression at all at the pistons. I towed the car home checked the compression an all 4 cylinders and I was right I had no compression at all on all 4 cylinders. I see the timing belt turning when I crank it so I know for sure that it can't be the timing since the belt was replaced MAY, 2009 when the water pump went bad along with a new pump and rebuilt head w/brand new valves. I'm not sure what 's going on all i know is when I crank it the timing belts turns, the pulley belts all turn fine. This is the first time I had this problem. I fix all my cars but this is a first for me. If anyone has any idea what could it be I appreciate your help. I just spent a lot of money on this car so I need to have an idea before I start pulling it apart after installing a new head gasket set with all the new parts. THANKS

Picture of What could it be? Car died. I lost all compression on all 4 cylinders in my car ?
LakeeshaW16 days ago

please help yesterday I put my builk Lucerne in the shop to have the timing cover gasket fixed and today rather tonight my car has stopped on the eway and won't start back up!??please help

madrasi5 years ago
I have been building engines all my life foe the street and the race track. Your timing has nothing to do with the compression in your cylinders. If you have no compression in any of your cylinders the you either have a cracked head,blown head casket, warped head,cracked block between each cylinder. Was all the spark plugs in good " meaning not striped out " . If you have a bad or bent valve that would let the pressure out of that one cylinder but not all of them at once. Check to see if there is any water in the oil pan, if there is the water will come out first because water is heaver than oil and will go to the bottom so pull the drain plug out slowly to see what comes out first. If there is water in the oil that you have a big problem. Either you have a cracked block or head or head gasket. If there is no water in the oil than I would check the piston rings. First thing to do is take off the valve cover and crank the motor over very slowly and watch all the valves operate right and move up and down the full travel that there supposed to. If they are all good the takes out the bad valve situation. If there is no water in the oil and the valves are good thats a good deal. Next take a very thin shim gauge and run all the way around the head at the gaskett point and see if you can get the thinest one in between the head and the block, if you can get any of the shim in than the head is warped. Next take an air line and screw it in to each spark plug hole ( Start with little pressure first ) and if there is a crack anywhere you will find it that way or at least have a starting point to go with. If you have a small crack and the motor is cold the crack might not open up wide enough with the motor cold so you might have to up the pressure a bit more BUT GO SLOW ON ADDING THE PRESSURE!!!!!!!!!! because the fluids might shoot out fast and hard so please wear safety glasses. Check those out first before you go and start tearing the thing down. If you have any more questions just let me know and I'll help you out as much as I can. Please let me know what happens either way I am interested now and would like to know if any of it works and when or if you get it running. Good luck If you need to you can IM me and go from there.

Very informative thank you man....I have a 89 toy pickup with no compression in any cyl. This helps me a lot!!

Please let me know if any of this really helped you. Good luck

did air into each cyl. air leaking all inside cyl. head and differnt cyls. seems to me iam getting reman head with head gasket kit my son cant get another used truck for 500 plus
Madrasi u really seem to know ur stuff i got a 2.2 gmc sonoma my sons truck it died i towed it home cranked it sounded like time chain took cover of tensinor busted apart chain still on so i replaced it with new chain and gears and tensinor parden my spelling well still problem no compression all 4 cyls. took valve cover off all valves moveing fine no coolant in oil rad. still full i even presure tested rad. with plugsout held 15psi. iam really baffled with this
anair758 months ago

doing a compression leakage test will tell you where the problem...you can you tube how its done...i had the same problem best of luck pliz reply if this helped you.

metameric2 years ago
You must base your reasoning on the balance of probability. Could the head gasket cause no compression on all cylinders, yes it could but is this most likely cause? The engine block could crack, it happens, but is that the most likely cause?
When discussing whether water is showing in the oil that is a good tip because it is quick to check? But on belt driven ohc or dohc engines if there is no compression on any cylinder, and the noise of the engine is different from the usual sound whilst turning over, and if a noise was heard as the engine failed? Then my money is on bent valves being the cause, even if the timing belt has not broken, and even if the marks still line up? The head or heads need to come off for a closer inspection. Makes no difference if a cracked head or engine block, or a blown head gasket, or damaged valves, the removal of the head will still be necessary, and then we will know the problem.
Ok similar problem but I have hadall timing components replaced and refined and still no compression in 5of6 cyl. Valves seem to be traveling fine and full distenc. I don't remember any banging when the car went dead. since this is dohc interference engine that would mean 20plus valves damaged enough for no compression but not enough to effect valve travel?Since none of the answers explaning the problems are good answeres I assume my best option is new engine with warrenty since I stil owe three thousand on the car any advice?
PitStoP (author)  schmiddy2 years ago
What car and engine do you have?
Is it a Dodge Neon also?
crankdude3 years ago
I've had this problem before, The exhaust timing gear may have spun causing the pistons to crash into the exhaust valves. When I had the problem it was preceded by what sounded like valve clatter. all 8 valves ended up bent enough to not let them close. (no compression) The timing chain will still look like its on the marks. The gear may even fall back into place or not. If you remove the gear you can see a groove where it spun. I noticed this after taking the valve cover off and seeing that none of the buckets over the springs were rising all the way up in comparison to the intake buckets,
Re-design5 years ago
Yup. The timing belt jumped a cog or two. I don't know if this is an interference engine. Even if it is maybe you don't have damage but the only way to tell is to get that belt timed again and see if you've got compression. Don't start it until you get that belt replaced. I had a 75' Mustang that every 10k miles or so would shear of the lugs of the rubber timing belt and leave me stranded. It did that 3 times and I traded it off. Never had a clue what was causing it. Good luck.
PitStoP (author)  Re-design5 years ago
I was thinking the same thing but I still haven't touched the engine. All I did was check for compression. thanks
i would like to hear about how you fix this problem im having the same problem with mine,
lemonie5 years ago
When the belt was replaced did they also replace the belt-tensioner? I'm going with the guys who reckon it jumped / slipped. Total head-gasket failure I doubt. L
PitStoP (author)  lemonie5 years ago
No. I didn't changed it since it looked ok.
lemonie PitStoP5 years ago
It's one of those often-remarked things, change the belt and the tensioner, as it's cheaper than a new engine. Anyhow we won't know what's up until someone takes it apart. Would you let us know what you find?

L
PitStoP (author)  lemonie5 years ago
yeah true, but I figure since the water pump was bad then why spend more money right...lol. I'll keep you all posted when I get to the problem. Hopefully soon since I need my 2 cars running.
Often on newer engines (after the late '80's) the manufacturer recommends replacing the timing belt, gears, tensioner, and water pump all at once if any one component fails.  Personally, I don't see it as anything other than a thinly-veiled attempt at planned obsolescence to increase repair bills, but it has to be done anyhow.  My sister had a similar situation when her water pump died on her 1996 Buick with 2.3 L engine.  She could only afford to replace the pump, but after a month of running just fine the belt slipped and caused her engine to die.

Anymore you just have to be careful and expect to replace at least three other things that weren't necessary to replace back in the good old days - when any Joe could perform any repair in their own driveway in less than an hour.
if you can turn th' engine over and there aint any bumpin' or bangin' noises then th' vlvs are most likely not hittin' th' pistons ,  if th' belt jumped a couple of cogs then th' vlvs are all still open (either intake or exhaust all th' way up to TDC !

Before you spend any money ,  Set yer timeing and check yer compression again ! If th' compression comes back then you found th' problem and go from there !
acidbass5 years ago
I have a 2000 neon and the same thing happened to me it ended up being the timing belt and a oil change that fixed it
I'm not sure what's wrong, but I think when your car stands upright and looks at you it's time for a professional service.
I'm thinking that if it can stand up like that on it's on then darnit it can fix itself too.
PitStoP (author)  Re-design5 years ago
lol... I think you're right.
PitStoP (author)  DELETED_GuardianFox5 years ago
I don't know 20 years of repairing all my cars and never had this problem I must of been doing something right to never having a problem like this. But thanks for the advice.
PitStoP, I'm not an expert, But, My brother had the same issue with his 2000 Neon.All indicators point to the timing belt and if that is the problem the engine is pretty much trashed. I would try pulling the valve cover off to see if the cam is turning and the valves are operational. If there is no compression at ANY of the cylinders the valves are not opening and closing or the pistons are not moving. The head gasket would show oil in the coolant or coolant in the water and would not cause the engine to suddenly stop running without some prior indications. The only other thing I can think of is that it jumped time(the belt slipped).
PitStoP (author)  professor20055 years ago
Thats the next step I was going to take checking the cam to see if it's moving if it's not then the pin in the cam gear maybe broke,if not then something wrong with the crankshaft. I'm hoping if the timing belt jumped a few notches the valves didn't bent cause I just put new valves in when the wated pump went bad. Thanks