94cutlatized Posted May 10, 2006 Report Posted May 10, 2006 1994 cutlass supreme 3100 engine locked up when i was accelerating. i had hit a steel bar like 5 minutes before, tought that blew my pan, but it didnt, the car has oil. there is no damage under the car. Im thinking my timing chain broke. any ideas on what to do. is a new engine better than a repair? are rods and valves bent? help please. Quote
Regal_GS_1989 Posted May 10, 2006 Report Posted May 10, 2006 easy way to see if the timing chain snapped is to take off the oil fill cap and look at the rockers while having someone crank it over. It they move, than the chain is not broken. Quote
94CutlassXtreme Posted May 10, 2006 Report Posted May 10, 2006 What kind of noise did it make before it locked up? I'm thinking broken cam. Quote
19Cutlass94 Posted May 10, 2006 Report Posted May 10, 2006 In theory, theres many things that could have happened. Check to see if you broke the timing chain by the above mentioned. Also, Id drop the oil pan to see if theres anything in there that could tell a story. Quote
94cutlatized Posted May 10, 2006 Author Report Posted May 10, 2006 it was about to hit about 4K RPM.s then the engine just bogged down like if it had no oil(but it did) and it just turned off. I took it home and tried turning the crankshaft, but no luck the thing is stuck really bad. When i crank it, it wont do anything, but the pinion gear from the started does kick in, the volts go really down, since the engine wont turn over. When it barely happened, i tried cranking it, and it did, but it souded like it only turned maybe 5 teeth on the flywheel. and it sounded horrible, again, like if it had no oil. sounded like a semi's caterpillar. That was the only time it turned over, it wont no more. I would have to go on to dropping the pan like said above, but will have to wait till next week. i have maybe an explanation for it but does anyone know if it Is possible for the timing chain to have just gotten stuck and not snapped? or at 4000RPM's everything breaks? Quote
89GP_SE Posted May 10, 2006 Report Posted May 10, 2006 it is possible that the timing chain simply jumped and is lodged in their, take off the cover for it and take a peak, seems that thats all you can really do right now Quote
94cutlatized Posted May 10, 2006 Author Report Posted May 10, 2006 cool man, thanks ill get on it right now. tell uall what i saw when im done. Quote
Psych0matt Posted May 11, 2006 Report Posted May 11, 2006 nice. sounds like when my old engine blew. if i get time next weekend Ill take the heads off and see if i cant figure out what happened (pretty sure it was a rod, it knocked horribly for about 5 or 6 seconds and then just seized. i could turn it about 359 degrees each way, and would just stop) Quote
94CutlassSLCoupe Posted May 11, 2006 Report Posted May 11, 2006 I would just replace the engine...3100's are a dime a dozen and you could easily just swap a newer 3400 in there. Quote
R Dubya Posted May 11, 2006 Report Posted May 11, 2006 dont check the timing chain, check the spark plugs first. Bet it hydrolocked a cylinder and thats why it wont turn over. Drain the oil, and check the plugs. Quote
White93z34 Posted May 11, 2006 Report Posted May 11, 2006 pull the spark plugs and see if you can raotate it. if there is coolant or oil traped in the cyl that would cause it. Quote
94cutlatized Posted May 11, 2006 Author Report Posted May 11, 2006 how does hydrolock occur. Ive heard bout it before in the site, but never asked. Do i have to drain the oil to chek the spark plugs? i was bout to begin with the timing chain, but dumass me i need a puller for the crankshaft pully, so while i get it, ill chek the spark plugs, with the oil out? Quote
Psych0matt Posted May 11, 2006 Report Posted May 11, 2006 isnt that when a bit of moisture gets in, and because of its expansion rate or something it expands to fill the cylinder and cant be compressed... am i even close? Quote
White93z34 Posted May 11, 2006 Report Posted May 11, 2006 just take the spark plugs out, there is absoutely no need to drain any fliuid prior to removing them. hydrolock is when liquid, antifreeze namely enters the combustion chamber and the engine cannot compress water, therefore the engine will not rotate. think of it as an obstruction to the piston moving. if you pull out the plugs and rotate the engine any liquid that may have entered the chamber will be expelled through the spark plug hole. bad headgaskets, intake gaskets are posaable causes for it, along with cars tht went through floods will often be hydrolocked. Quote
Psych0matt Posted May 11, 2006 Report Posted May 11, 2006 ok, thats what i was thinking (in a very minimal way) Quote
94cutlatized Posted May 11, 2006 Author Report Posted May 11, 2006 ok, thats what i was thinking (in a very minimal way) hey u had the idea. i had no clue. damm ok, let me get to it then. thanks Quote
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