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Our 2002 E430 makes a loud clicking noise at an idle -- goes away at higher RPM. Any thoughts?

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Roaring engine noise in cab when idling. Idles at 500-950 rpm..When raising rpm in idle noise goes away.2002 GMC Envoy 6 cly.

Should idle between 500-600. Clean your throttle body with the battery disconnected to help with the fluctuation. The roaring very well could be your fan clutch. Fan clutches are a known problem with our platform. If engaged, will sound like an airplane.

Jun 06, 2017 | 2002 GMC Envoy

1 Answer

Have a 1995 ford heavy 250, 7.3 diesel, recently had fan belt replaced and now getting a loud high pitched vibration noise when accelerating it occurs between 1000 and 1500 Rpm and goes away at higher...

sounds like your fan clutch may be failing, remove the drive belt and manually spin all the pulleys by have listen for noise and feel for looseness in the bearings

Jul 31, 2011 | 1995 Ford F250

1 Answer

Have 1 2002 F-250 V-10 with 119K miles, a strange sound coming from internally.Im told it may be a tensior/idler pulley internally and aq major expense-repair?..The soudns apears to cycle every 3-45seconds...

Hello, The Tensioner is not too expensive to replace. You just push on the tensioner and create slack in the belt and then remove the belt. There are only a few bolts holding this part on. Replace the part and then create space for the belt by using the tooling on the Tensioner. There should be a square fitting for a socket extension or breaker bar to fit.

It is not necessary to slip the belt over the Tensioner as the last pulley. You can slip the belt over the Alternator or any top pulley on the engine. Then release the Tensioner. You may also want to replace the belt as dry belts can be noisy at times.

You might want to turn off your A/C to verify the noise is not the A/C compressor cycling. Sometimes the A/C clutch will rust and make more noise working than when rust-free. The way you describe more noise at idle and less at higher RPM, it is characteristic of how a compressor clutch will cycle when the Freon is a little low. If the compressor is turned off, then the noise should go away if the Freon is the problem.

Jun 30, 2011 | 2002 Ford F250 Super Duty SuperCab

1 Answer

A loud noise when I turn on the AC and shift it to D or R.

What kind of noise? If it's like a squeal it is a lose belt. If it's more like a clunk it's the transmission shifting and you just happen to notice it more because of the higher RPM the motor is at with the AC on. Try getting the vehicle moving with out the AC on then turning it on after you are moving to see if you get the same sound. If it's a squeal you have a loose belt that needs replacement or tightening.

Jul 11, 2010 | 2002 Chrysler Town & Country

1 Answer

Loud clicking noise coming from crankshaft pulley and goes away when a/c is on and when idle is higher. Why the noise?

Take a dry bar of soap and touch it against the sides of the belt(s) while the engine is running. If the noise goes away for a little while, the noise is from the belt settling into the grove of the pulley. Belts can really make loud pooping noises.

If this has no effect, then your timing chain may be too loose for the timing chain tensioner to compensate, and the chain is slapping against the inside of the timing chain cover.

If this is the case, do not let this condition go on. The timing chain cover is aluminum, and the chain is high grade steel. The chain will wear a hole in the cover if it is hitting the inside of it, and that is allowed to continue.

Jun 26, 2010 | 1994 Toyota Camry

2 Answers

Growling engine noise only at idle. Cam area

Take all of the belts off for a short run at idle. If the sound goes away it is pulley related, spin each pulley and listen for bearing noise, also check for play at this time.

If the noise does not go away when the motor is driving no accessories you have a more serious problem.

Jan 13, 2010 | 1991 Oldsmobile 88

1 Answer

I have a 2002 D5 with 150,000 on the clock. When cold there is not a problem however at about 2500 rpm under load and when hot it rattles. The noise goes away when the revs are increased or decreased. Its...

Sounds like the viscosity of your oil is not high enough for the mileage. My van has a loud valve rattle when it is low on oil or is in need of an oil change. I use I higher viscosity oil and a bottle of lucas oil stablelizer and it quites right up. This may not be the case for you. You need to isolate the noise. By isolating the noise it will give you a better idea of whats making the noise. Try using a mechanics stethoscope and find where the noise is coming from. It might just be time for your mechanic to overhaul your engine.

Aug 04, 2009 | 2002 Volvo V70

1 Answer

Knocking or pinging noise at idle

check your timing chain or belt might be loose and or your belt tensioner is not working

Aug 02, 2009 | 2002 Mazda Millenia

1 Answer

Whinning noise

possible power steering pump.

Feb 04, 2009 | 2004 Toyota RAV4

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