motor only has 40miles on it......any sure fire way to tell what it is? ..its only at idle or low rpms.
rod bearing? collapsed lifter? crank? what?

I can really only hear it on the drivers side.....I cant hear it on the bottom end cause I can fire the motor and crawl under the car and put my ear right up to the oil pan and its not there.....I still have open headers so it is hard to tell where its coming from.

its been doing it for about a week.....and today its wasnt there....I had a stethascope and couldnt pin point it.......
a machanic friend of mine heard it yesterday and says its a rod bearing

I dont want to have to pull the motor or drop the pan......with the one piece rubber gasket that oil pan was a pain to get on even on the engine stand..I can only imagine under the car.

what do I look for?

I spent alot of money on this puppy...and Im pissed!

heres the motor

383 stroker
HSR intake
AFR 195's 65cc heads making it 10.6:1 comp
KB 7cc flat tops pistons
6" forged rods
58mm BBK TB
30lb injectors
226/233 535/537 114.5 custom caminnovation cam
COMP push rods, retro lifters, and 1.52 pro magnum rockers
hooker super comp LT's and a Borla waiting to go on

 

Does it sound like a low frequency knock, kind of like hammer hitting a large solid chunk of metal?

If a bearing has burned up you will find metal particles galore in the oil which I would go ahead and drain RIGHT NOW.

Most likely mains but it could be rods too, but if the sound comes and goes it should be something else.

 

How can you diagnose ANYTHING with open headers? Put the exhaust on and it will help ALOT!


If this is a stroker motor your crank may be hitting the pan, and it may have eh hemmm clearanced itself.


BTW sweet engine.....put the correct top rad hose on it...geeez that looks like some uncle Jessie crap.

David

 

Do you have a windage tray in the pan? Those gaskets aren't that hard to mess with either. Did you tack weld the pick up on the pump?

 

I drained the oil again...makes the 5th time...and there was no metal in it at all.....and yes the pump was welded and yes I have a windage tray in the pan....I was running rotella oil and the guy at AZ says to just use convetional Valvoline 30..so thats whats in there now...and I got an extra capacity filter.

 

Are you sure the rod bolts are clearing the windage tray? I had that problem with my motor and I had to drop the pan to take out the tray like 30 minutes after I got the motor in.

 

it never made that noise until like a week ago.....I took it to about 3/4 throttle...rpm's...I have no clue I wasnt watchin.
its like a clattering noise....like something is loose in there.....Im taking it tomorrow to Firestone to have the front end aligned......and I'll ask my front end guy what it is......it will be the longest trip the car has gone .....28miles each way.

my luck I'll throw a rod on the way there..

 

Is the car a 6spd or auto? If it's a 6spd, does the noise go away when you depress the clutch? If it's an auto, is the flywheel bolted down tight.

 

OK..exhaust is on...I drove it 110 miles each way to have mandrel tubes put on....and when I fired it up....the sound is coming from ALL OVER the torque converter, flywheel area......SOmthing sounds likes it going to rip the freaking things apart when u crank it and at idle...and when you give it gas.......I drove it back the 110 miles and it is...and it sounds like chit!....

so where do I start looking? I know the trannys got to come out......

we had it up on the lift at the exhaust shop and I was right there at it....I fired it up and we raised it back up....in that area it sounds likes it gonna fly apart like the whole thing is about to explode in a million pieces.

i'll get a sound clip tomorrow and post it.

 

Loose flywheel bolts, loose converter bolts, bad stator in the converter, bad front pump in trans.

Start in those places.

David

 

the noise can be heard when the starter first engages the flexplate.....without the motor even running. You know like when trying to crank a motor over with no fuel or spark....and then once the motor fires the sounds stays and becomes very loud and like something is going to fly apart....
When it was up on the lift I had the motor running and looked to make sure the starter was not engaged or anything..or any part of the started near the flex....we also tightened the TQC bolts...

of course now the more I drive it the more it makes noise....and clatters and rattles and .....one day something is gonna come apart...I just know...

This noise started once I took the car up in the RPM's and went 3/4 throttle....actin a fool!....
at the time only had 40miles on the motor, flex and TQC.....the car now has about 300miles

the sound was not there at all during the first 40miles.

 

Take the torque converter bolts out and start it.....it will tell you if it is in the engine or torque converter/trans.


David

 

will the converter still spin alittle? doing that wont hurt anything?

I'll do that when I get home tonight!

lets just say it wasnt the converter or flexplate?...what else could it be? that would do that in the same location as the 2.

 

ok heres the noise video...its alot louder and more clattering when I put it into gear....sound quality sucks with this camcorder...its really loud in person.




can u tell what it is?
Im going to drive it tomorrow to a trans shop but thats like 30miles away...I live out in the sticks.

 

DId you take the converter bolts out? That will tell you ALOT. If it quits, pull the trans pan and see whats in there, if it dont, pull the oil filter, cut it open, see whats in there.


I would not drive that car ANYWHERE! Unless you got deep pockets. Trans failure could mean a fire, engine problem could be catastrophic. You got good oil pressure? Take the converter bolts out and start the car.....do not rev the car or put it in gear, just start it.

David