lots of noise from upper end- help. - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 10-21-2010, 03:22 PM Thread Starter
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lots of noise from upper end- help.

97 f350 auto 7.3 with 389,xxx on it. starts fine, very little smoke/blowby .at idle it sounds like the motor is going to blow into peices, give it a little throttle it goes away. drives fine with normal power until it has to idle then the sounds come out. so far i have ran it without the belt to eliminate all acc. noise, changed oils and checked every bolt in torque conv. done the probe to ear test and it is louder on the front of motor.
im lost from here, new to me this diesel stuff. anyone got any suggestions short of a new motor, and anyone in the st.louis/ st.charles mo. area care to listen themselves? thanks
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post #2 of 8 Old 10-22-2010, 08:03 AM
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Not sure what you mean by that, but 7.3s are VERY noisy. I hate getting under the hood of mine when it's running. In fact when I have to, I usually wear ear plugs!

Can you describe what you're hearing or post a clip on youtube or something?

Randy DuCharme (Radio AD5GB)
2006 F-250 XLT FX4, auto trans, super cab, short box

Engine:
  • ARP head studs
  • Warren 175/30s
  • KC Turbo's DIY billet Powermax
  • FASS Titanium 125G
  • XDP regulated fuel return
  • IPResearch remote oil cooler and filter
  • IPResearch Gen III EGR solution

Transmission:
  • Precision Industries Stallion converter (1800 stall)
  • Billet input and intermediate shafts
  • Billet overdrive planetary carrier
  • Billet low/reverse hub
  • Billet pump gears
  • Modded direct and coast clutches
  • Raybestos GPZ Extreme frictions
  • MTS stage II direct clutch and EPC solenoids (to be removed)
    (hard parts from Andy Warren)

Misc:
  • Warren and Gearhead Performance tuning (DIY in the works)
  • MBRP 4" turbo-back exhaust
  • Y-pipe mod (Vibrant triple wall flex joints)
  • River City Diesel fuel sump
  • Fumoto valves all around
  • Glowshift boost, pyro, oil and fuel pressure gauges
  • AutoEnginuity for logging and diags
  • ScanGauge II to monitor other stuffs
  • Bilstein 4600s
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post #3 of 8 Old 10-22-2010, 08:26 AM Thread Starter
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it sounds as if all the rods are knockin in same time, then it will "clear up" for a second run smooth then go back to knockin. but if i throttle it up just a little bit it all goes away and runs just fine with the normal clatter.
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post #4 of 8 Old 10-22-2010, 08:36 AM Thread Starter
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also can compare it to a truck without being plugged in at 0* and starting up. lots of noise!!!
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post #5 of 8 Old 10-22-2010, 11:24 AM Thread Starter
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well ive narrowed it down to .............cracked flexplate.
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post #6 of 8 Old 10-22-2010, 11:58 AM
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Dang! I'd have never guessed that without hearing it.

Randy DuCharme (Radio AD5GB)
2006 F-250 XLT FX4, auto trans, super cab, short box

Engine:
  • ARP head studs
  • Warren 175/30s
  • KC Turbo's DIY billet Powermax
  • FASS Titanium 125G
  • XDP regulated fuel return
  • IPResearch remote oil cooler and filter
  • IPResearch Gen III EGR solution

Transmission:
  • Precision Industries Stallion converter (1800 stall)
  • Billet input and intermediate shafts
  • Billet overdrive planetary carrier
  • Billet low/reverse hub
  • Billet pump gears
  • Modded direct and coast clutches
  • Raybestos GPZ Extreme frictions
  • MTS stage II direct clutch and EPC solenoids (to be removed)
    (hard parts from Andy Warren)

Misc:
  • Warren and Gearhead Performance tuning (DIY in the works)
  • MBRP 4" turbo-back exhaust
  • Y-pipe mod (Vibrant triple wall flex joints)
  • River City Diesel fuel sump
  • Fumoto valves all around
  • Glowshift boost, pyro, oil and fuel pressure gauges
  • AutoEnginuity for logging and diags
  • ScanGauge II to monitor other stuffs
  • Bilstein 4600s
AD5GB is offline  
post #7 of 8 Old 10-22-2010, 12:11 PM Thread Starter
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still cant believe it myself. but i can see the cracks coming out from the center and the bright metal where its been rubbing. now im waitin to see how much shop wants to fix or if im gonna do it myself.
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post #8 of 8 Old 10-22-2010, 12:34 PM
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It's not a bad job with a trans jack. Alldata sets the job at 4.8 hours labor. If you take it somewhere, don't let 'em charge much more than that.

Randy DuCharme (Radio AD5GB)
2006 F-250 XLT FX4, auto trans, super cab, short box

Engine:
  • ARP head studs
  • Warren 175/30s
  • KC Turbo's DIY billet Powermax
  • FASS Titanium 125G
  • XDP regulated fuel return
  • IPResearch remote oil cooler and filter
  • IPResearch Gen III EGR solution

Transmission:
  • Precision Industries Stallion converter (1800 stall)
  • Billet input and intermediate shafts
  • Billet overdrive planetary carrier
  • Billet low/reverse hub
  • Billet pump gears
  • Modded direct and coast clutches
  • Raybestos GPZ Extreme frictions
  • MTS stage II direct clutch and EPC solenoids (to be removed)
    (hard parts from Andy Warren)

Misc:
  • Warren and Gearhead Performance tuning (DIY in the works)
  • MBRP 4" turbo-back exhaust
  • Y-pipe mod (Vibrant triple wall flex joints)
  • River City Diesel fuel sump
  • Fumoto valves all around
  • Glowshift boost, pyro, oil and fuel pressure gauges
  • AutoEnginuity for logging and diags
  • ScanGauge II to monitor other stuffs
  • Bilstein 4600s
AD5GB is offline  
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