Rattling noise at idle - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 02-12-2007, 09:51 PM Thread Starter
 
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Rattling noise at idle

Has anyone with an early 99 experienced a rattling kind of noise at idle? :shrug:

Doesn't matter what the engine temp is. Cold or Hot. Does not happen at fast idle during warm up. Seems to be coming from the rear of the engine possibly in the turbo area. As soon as you come off idle, even in neutral, the noise stops. Only makes the noise at idle. Stops around 900 RPM. Motor runs fine. No hesitation and does not run rough. There does not seem to be a problem except for this excessive noise.

Is this normal for the early 99 or should I be concerned?

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post #2 of 9 (permalink) Old 02-12-2007, 10:28 PM
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Does it sound like marbles in a coffee can? If so it most likely is your Torque Converter. Gene :mafia

2001 F-250 XLT, cc sb 4X4, 3.73 LS,auto, Ported ATS shroud housing 1.00 exhaust housing Banks wicked wheel adjustable wastegated turbo,Non Ebpv pedestal and gutted Ebpv, DI Performance regulated fuel return kit, Dieselsites' 203* thermostat and billet housing, MBRP 4" ss turbo back exhaust system, AFE Stage 1 air intake, Jody Tiptons' F5 chip with no start,stock, 60hp tow,and 120hp race tune for now til I get big oil and injectors. Sonnax kit, Dieselsites' A/C heater core bypass valve, Autometer Boost, Pyro, and Trans temp guages in A pillar, Regulator in MAP line set at 20psi, boost tube, wastgate adjusted real tight, Aih delete, and Zoodad'ed. Amsoil fluids, Monroe Reflex shocks, and Ironman APR 265/75/16R tires.
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post #3 of 9 (permalink) Old 02-12-2007, 10:36 PM Thread Starter
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I think it's louder than that. Is there any way to make a diagnosis? Would the old broom stick technique work?
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post #4 of 9 (permalink) Old 02-13-2007, 01:07 AM
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Maybe it's just the #8 injector cackle syndrome. Yes you could use a broom stick or a long screwdriver with a plastic handle . I have used these many times to find the true source of noise. Gene :mafia

2001 F-250 XLT, cc sb 4X4, 3.73 LS,auto, Ported ATS shroud housing 1.00 exhaust housing Banks wicked wheel adjustable wastegated turbo,Non Ebpv pedestal and gutted Ebpv, DI Performance regulated fuel return kit, Dieselsites' 203* thermostat and billet housing, MBRP 4" ss turbo back exhaust system, AFE Stage 1 air intake, Jody Tiptons' F5 chip with no start,stock, 60hp tow,and 120hp race tune for now til I get big oil and injectors. Sonnax kit, Dieselsites' A/C heater core bypass valve, Autometer Boost, Pyro, and Trans temp guages in A pillar, Regulator in MAP line set at 20psi, boost tube, wastgate adjusted real tight, Aih delete, and Zoodad'ed. Amsoil fluids, Monroe Reflex shocks, and Ironman APR 265/75/16R tires.
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post #5 of 9 (permalink) Old 02-13-2007, 01:10 AM
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Have you done an exhaust system? down pipe could be rubbing on the heat sheild. Could be the up pipes too...

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post #6 of 9 (permalink) Old 02-13-2007, 01:29 AM
 
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I second the Torque convertor
FMT
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post #7 of 9 (permalink) Old 02-14-2007, 02:38 PM Thread Starter
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You guys are good. The noise seems to be coming from the area of the torque converter.

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post #8 of 9 (permalink) Old 02-15-2007, 08:43 PM
 
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My truck sounds like it has an exhaust leak, i was sure it was a leak until i finished putting on my new pump, and the tech that was in the shop pointed out that when i reved it the noise went away... he mentioned it was the Flywheel, i guess they have springs to dampen the noise but they are worn on mine.
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post #9 of 9 (permalink) Old 02-15-2007, 08:59 PM Thread Starter
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I guess it could be the flywheel. That would be OK. Flywheel is probably cheeper than a torque converter. Anyway, the noise is definetly coming from that area. Since I have it pinpointed and it isn't affecting operations, I will probably just drive it until the summer. I don't want to make any repairs until the weather warms up.
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