Thread: knocking then whistling

Tweet

Oh yeah forgot to mention I did find some chipped teeth on the flywheel

Ok well I recorded the flywheel and it doesn't seem to have too much wobble in these videos so I guess its okay , I recorded once in park and once in drive, you can also hear the knocking in the video if anyone's got a really good ear maybe can tell what it is???

http://vids.myspace.com/index.cfm?fu...deoID=14416834

http://vids.myspace.com/index.cfm?fu...deoID=14417585

Whatever it is, better start taking things apart and checking before the engine gernades and starts kicking parts out the pan or something.... You could try pulling the plug wires one at a time and see if you can isolate it to a specific cylinder....

Oil pressure reads perfect when at idle and goes up as you raise the throttle, no fluctuations at all, I've tried pulling plugs to see if it was a specific cylinder but no change with each plug I pull.

The flywheel has no play in it and neither does the balancer on the front.

I guess I will have to pull the valve covers and check things out underneath em

Also this motor only has about 2,000 miles on it. This was done during the rebuild 350 .030 over,4 bolt main, pop-up high compression pistons ( I think 11:1), Torque Cam, Z28 valve springs, High volume oil pump, Heads have been milled, Factory Corvette intake, 780 cfm carb., 3500 stahl converter. 3 angle valve job.

Not sure of that will help any but just throwing it out there

Sorry not meaning everything is perfect, but the oil pressure at idle is about 25 steady and goes up as the throttle goes up without any sort of fluctuations. I'll check what it raises up to next time I start it.

By no play I mean I can't really get any movement by moving it by hand, but I could be doing this wrong, I don't know.

Just let me know what to check and how to check it and I will

By the way all this help is greatly appreciated so far

take a broom stick,rake handle, hold one end near the pan, or where you think the noise is coming from, the other end to your ear, and you should be able to hear the noise. its a cheap stethescope(sp). good luck.

Originally Posted by DennyW

I don't know what you are calling perfect ?? And I don't know what it raises up to ?? What do you mean you don't have ANY play at the balancer ?? These little things without numbers, do not tell us anything. If all was perfect, your engine would not sound like it does. Remember, we can't see any of the facts way over here.

Ok I got some numbers on the oil pressure

Cold engine 40 PSI in Park/ 35 in drive

Hot engine 15 PSI in Park/ 10 in drive

its about 27 PSI at 1500 RPMS and about 37 PSI at 2000 RPM's

Alright recorded a new video with variations in RPM's in this video you can the slight wobble I mentioned earlier in the thread

http://vids.myspace.com/index.cfm?fu...deoID=14590492


Also did the stethoscope idea and I get three places that seemed the loudest 1.) The Alternator itself 2.) the front of the left valve cover 3.) the front of the oil pan

I also unbolted the torque converter to check again for cracks, again couldn't find any and when flexing only the outer part flexes, but I'm guessing(don't honestly know) thats normal since its called a flex plate.
Also took some pics of it to see if maybe someone can see something I didn't
Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31
Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31
Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Shot with KODAK Z730 ZOOM DIGITAL CAMERA at 2007-07-31

Also tried prying on both ends of the crankshaft and virtually has no play on the balancer side or the flexplate side unless you really pry on it, you can move it a hair

ok ya i see what you mean....what does that MEAN???....That the bearings are worn out?????????????