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3.8 Bad Knock


96-T-Bird-Ga
04-03-2006, 01:59 AM
:banghead: The motor knocks really bad. I think that it could be i need to replace the valve , push rod and rocker arm or what ever it is but then i had my friends dad look at it and he said that its fixing to spin a bearing and i just dont know what to do now so any info will help . And another thing is the oli pressure drops all the time and i thought about changing the oil and the filter but im stuck the car is great and rides really smooth but the motor knocks to bad, its bad e-nuff when i have my subs hittin 150 db i can still hear the knock. Thanks -Mike-

intrcptrbird
04-03-2006, 10:20 AM
replace the engine or rebuild it if its the bearing. What kind of sound is it and when does it make it? Ive had some experience with loosing an engine that way so I might be able to diagnos it if you can tell me the symptoms.

96-T-Bird-Ga
04-03-2006, 02:23 PM
well as soon as i crank it up it starts knockin. it sounds like a rod but i could be wrong it knocks all the time no matter what time , the oil pressure drops and idles really low and at one time the whole car would start to shake but it hasnt done that in about 3 weeks or more. -Mike-

intrcptrbird
04-03-2006, 03:45 PM
Those sorta sound like a crankshaft bearing. Does it knock no matter the RPM? Or does it only knock at certain RPM's?

The absolute best way to find out what it is is to take it to an engine shop and have them diagnoss it. When I lost my connecting rod bearing thats what I did. They didnt even charge me for it.

96-T-Bird-Ga
04-03-2006, 10:05 PM
well see thats thing down here there is nothin free and right now im a little on the broke side to have someone look at my car.... but it knocks at all rpms no matter what and the oil pressure drops after about 3 or 4 min of the motor running.. when i put it in drive it has a power loss to and im starting to think that imma have to replace the tranny and the motor or the toqure con.... but like i said i dont know it all and dont know excally whats wrong.... -Mike-

five-oh-H.O.
04-04-2006, 01:10 PM
could it be a timing issue?

96-T-Bird-Ga
04-04-2006, 04:47 PM
I had my friends dad look at it again and listen to it he said that it might end up shootin a rod. Is there any way that i could go in the motor to replace anything to just temp fix the motor for a while? cuz like i said i aint got the money right now to buy a new motor. - Mike-

terpsfan88
04-04-2006, 08:43 PM
Hey, i dont know very much but i had a bad knock in my 93 supercoupe and it was just a bad ground connection with one of my spark plugs. hope this helps a little bit, but it sounds like you might have a bigger problem.

KimMG
04-05-2006, 03:08 AM
Your engine is gone. If you continue to drive it in this manner, you may throw a rod and put a big hole in the side of the block. This may make repairs even more costly. There is no temporary fix. No cheap fix. The least expensive repair maybe buying a used motor.

intrcptrbird
04-05-2006, 09:55 AM
I agree with Kim. A bad ground would cause a miss and what you are describing does not sound like a miss. Also I agree with kim there is NO cheap fix. Start scouring the junkyard and calling shops to see how much you can get it in your area. The good thing is that they put the 3.8 in a lot of cars so you could possibly find a used one for pretty cheap in a junkyard.

melfan
04-08-2006, 02:19 PM
If it were me I would go the scrap yard a pick up another 3.8. They should be fairly cheep and easy to find. Or check out e-bay or even go to jasper.

Getting one from a junkyard might be better, you could always work on it as you have the money but of course that won't help your transportation problems. Don't pay more than $500 for the engine from the scrapyard, also this won't include the trans.

You should be able to pick up a rebuilt kit for the 3.8 at any good auto parts store for around $300-$600 and should include all you need, pistons, rings, bearings, rods and all.

If you are lucky you might find a good 3.8 in a newer car that is wrecked and may be able to just transplant it.

Hope this helps

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