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bamboozled, engine tick, burnt plug, HELP please

collegewrench

collegewrench

New member
i have a 99 gtp, all stock, loaded and paid 1700, so i figured some work was to be done. i was impressed by the car for a few months, until one day coming home from school i decided to test it out. 135 and still drove like 60. check engine started flashing, got home and parked it, few hours later i was going to pick up some friends when the car started making a bad ticking noise. grandpa said he thought sounded like a broken valve spring or bent pushrod.. ok, not to bad of a fix... so i tore into it. plugs were melted, found my coolant leak, bad intake gasket.also took rear head off to check valves and springs, pistons and walls werent burned or scratched, all good. a few months later i got the money for the gasket kit, so i put it back together and still ticks, new iridium plugs, wires were new 200 miles prior to my "test".. along with a recent oil and filter change.. i am goin to replace the lifters tonite. i am wondering what else could make said ticking noise... also, computer is throwing code, po336, crankshaft posistion sensor.. could that be from sittin with dead battery for awhile? any help or suggestions would be very helpful. never really done "engine work" and am surprised it ran when io put it back together.:th_winking:


ok. changed lifters and the tick is still there.. and noticed smoke on start up form the rear of the engine, it doesnt relly go away after a while either.also changed all gaskets, so unless the exhast has a hole in it. anything im missing? pushrods got mixed up when i put them back in, and noise still from same spot. so kinda rules them out wouldnt it? next step is some dynamite. lol
 
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Are you sure the plug didn't break the tip off of the spark plug instead of melting it? If it broke off you could have chipped a piston.
 
very possible, but i had the head off and felt the piston and cylinder walls,all is smooth and have a liltle black build upon top of the pistons, carbon? i am guessing it is normal for a older car? as i said i am new to the inner workings of an engine. tires, brakes and such i can do all day long.
 
Yeah, that's just carbon. I just looked at the original post again and saw your cps is throwing a code that tells me it could be your timing chain if its not your lifters.
 
If the coolant was floating around the motor too long it could have started destroying a bearing and making the motor knock....But if its only a ticking maybe you have an exhaust leak up front somewhere. Listen to some videos on youtube of rod knock on the 3800 motors, see if thats the ticking your talking about.
 
i have been on youtube alot, and from what i have heard it is a tick.. from the back pass side of the engine.. the po336 code could mean a timing chain? am i coorect in hearing of them sounding like a tick if the get streched? also, the coolant leak was there when i bought it, but not bad enough i had to add coolant but maybe once in the 1500 miles i put on it.. as i said, i got a deal on the car, so a couple hundred for engine work, i not crying. its frustrating to figure out what it could be. lol.
 


i have not. any special method to do that? i have thought about adding a oil presure, boost, and ammeter gauge on the pillar in the car. would that suffice to see the oil pressure reading?
 
That would do it. I never understood why GPs don't have an oil pressure gauge but the other W-bodies do lol
 
If you can get a recording of the noise, it would help with diagnosis. I'll pitch "cracked flex plate" as a possibility.
 
How'd you get the 100% stock car past 128mph?

It's not timing chain. They don't tick. If the dampener goes bad, you should have a kaboom, not a tick. Chain is moving too fast to tick.

Go buy a mechanics stethescope and find the tick. Once you've pinpointed it's origin area you'll know much better what part is hurtin.
 


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