Hi, I am new to posting in this forum although I have been an avid reader since purchasing my 2005 1 KZ GX prado.
At present I am pulling my hair out with a noise coming from the engine bay and am hoping that someone has some answers to help me. I have searched forum topics both here and all over the world and have thought for a couple of times "that must be it"! to only be disappointed. As the vehicle is primarily for exploring this wide brown land it is imperitive that the vehicle is reliable and i trust it 100% when in the middle of nowhere. At the moment the trust isn't there.
Ok so problemo descriptiano......
A whirring type noise coming from the left had side of the motor over the injector pump area. I can't distinguish if it is coming from just in front of the pump, underneath or from the pump but it is definitely in that area. It kind of sounds like a unlubricated seal or a faulty vaccum operated valve with a buzzing/whirring kind of sound. It could be mistaken for a squeaky belt. The noise is intermittant at start up with a cold motor and appears to get louder when the engine has warmed after 2 min or so. Sometimes when it is warm it goes quiet for a few seconds but that's it. And you can really notice it on shut down when it sounds like unlubricated rubber right to the end of the last rev of the motor. So definitely in time with the speed of the motor. It's almost even a vibration noise.
At first I though fan belts, so replaced and tensioned these correctly - NO WIN
Then fan belt idler pulleys? Nope
Then I thought mmmmm, timing belt?? or idler puller. As the vehicle is tip top nick, serviced by toyota until I bought it and only 105,000 on the clock. I though this was doubtful, but I decided to changed the timing belt, related seals and idler pulley. Still no joy!
Then I found some info on another forum about the fuel line return valve and a small spring that loses tension and creates a harmonic sound. Fix apparently is to pull the spring out and stretch it out a bit to reinvigorate the tension. I though this sounded plausible and everything seemed to point to this type of sound and solution. So out to the shed. STILL NO JOY!!!!!
So here I am finally posting a topic to seek some help! After this I will have to post some details about my rig build up etc to help others too. Something I've been meaning to do, as this is one of the most useful sites I have found on the internet about anything.
So Cheers in advance and I'll have to pull anywone with some leads on this prob a nice cold "cyber" beer!
Cam (Adelaide)
At present I am pulling my hair out with a noise coming from the engine bay and am hoping that someone has some answers to help me. I have searched forum topics both here and all over the world and have thought for a couple of times "that must be it"! to only be disappointed. As the vehicle is primarily for exploring this wide brown land it is imperitive that the vehicle is reliable and i trust it 100% when in the middle of nowhere. At the moment the trust isn't there.
Ok so problemo descriptiano......
A whirring type noise coming from the left had side of the motor over the injector pump area. I can't distinguish if it is coming from just in front of the pump, underneath or from the pump but it is definitely in that area. It kind of sounds like a unlubricated seal or a faulty vaccum operated valve with a buzzing/whirring kind of sound. It could be mistaken for a squeaky belt. The noise is intermittant at start up with a cold motor and appears to get louder when the engine has warmed after 2 min or so. Sometimes when it is warm it goes quiet for a few seconds but that's it. And you can really notice it on shut down when it sounds like unlubricated rubber right to the end of the last rev of the motor. So definitely in time with the speed of the motor. It's almost even a vibration noise.
At first I though fan belts, so replaced and tensioned these correctly - NO WIN
Then fan belt idler pulleys? Nope
Then I thought mmmmm, timing belt?? or idler puller. As the vehicle is tip top nick, serviced by toyota until I bought it and only 105,000 on the clock. I though this was doubtful, but I decided to changed the timing belt, related seals and idler pulley. Still no joy!
Then I found some info on another forum about the fuel line return valve and a small spring that loses tension and creates a harmonic sound. Fix apparently is to pull the spring out and stretch it out a bit to reinvigorate the tension. I though this sounded plausible and everything seemed to point to this type of sound and solution. So out to the shed. STILL NO JOY!!!!!
So here I am finally posting a topic to seek some help! After this I will have to post some details about my rig build up etc to help others too. Something I've been meaning to do, as this is one of the most useful sites I have found on the internet about anything.
So Cheers in advance and I'll have to pull anywone with some leads on this prob a nice cold "cyber" beer!
Cam (Adelaide)
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