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Weird clicking noise

Airzone

By Airzone,
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Airzone Rising Star

Airzone

Posted
Posted

Hi guys

Just wondering if anyone here knows what this might be.

I am experiencing a weird tapping noise that appears to be related to the engine speed and temperature. When the bonnet is down, you can hear it pretty clearly just by standing behind the front wheel. With the bonnet up, it's drowned out by the engine noise / injector clicking. It goes away eventually when the engine's warm. It's louder while idling.

It started as soon as I did my last oil change (shell oil). I dumped that oil and went for mobil 1. It's still there, but it goes away quicker. In both cases, the oil level was more or less correct (just a bit over) and the correct viscosity ratings (although the mobil 1 is thicker)

I read that people have similar noises related to the rockers and tappets (? whatever those are). I can't hear anything coming from the rocker covers and when I have the oil plug open there's only normal running noise (and I can't feel any air coming out either). I hear it more clearly if I stick my head under the car. Anyway, it seems to be related to oil somewhere.

My AFM is a little dodgy I think and is causing rough idling (I tried to clean it, but only made it worse, in typical fashion :rofl: ). I cleaned a whole heap of crap out of the AAC valve. There's no aftermarket bov - the car's stock to the balls.

Any idea what it is? I'll be trying electrical contact cleaner on the afm as soon as I get some.

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  • 4 months later...
Nismo_286 Contributor

Nismo_286

Posted
Posted

Hi,

I have a very similar situation like yours and was just wondering if you have solved this problem?

I am very irriatated by this tapping noise.

Thanks for your advice.

Hi guys

Just wondering if anyone here knows what this might be.

I am experiencing a weird tapping noise that appears to be related to the engine speed and temperature. When the bonnet is down, you can hear it pretty clearly just by standing behind the front wheel. With the bonnet up, it's drowned out by the engine noise / injector clicking. It goes away eventually when the engine's warm. It's louder while idling.

It started as soon as I did my last oil change (shell oil). I dumped that oil and went for mobil 1. It's still there, but it goes away quicker. In both cases, the oil level was more or less correct (just a bit over) and the correct viscosity ratings (although the mobil 1 is thicker)

I read that people have similar noises related to the rockers and tappets (? whatever those are). I can't hear anything coming from the rocker covers and when I have the oil plug open there's only normal running noise (and I can't feel any air coming out either). I hear it more clearly if I stick my head under the car. Anyway, it seems to be related to oil somewhere.

My AFM is a little dodgy I think and is causing rough idling (I tried to clean it, but only made it worse, in typical fashion :O ). I cleaned a whole heap of crap out of the AAC valve. There's no aftermarket bov - the car's stock to the balls.

Any idea what it is? I'll be trying electrical contact cleaner on the afm as soon as I get some.

Nismo_286 Contributor

Nismo_286

Posted
Posted

Hi.

I am a fellow skyline driver and have a similar problem to yours (as below). I am wondering if you have found the cause of the problem.

I would like to hear from you soon.

thanks.

Hi guys

Just wondering if anyone here knows what this might be.

I am experiencing a weird tapping noise that appears to be related to the engine speed and temperature. When the bonnet is down, you can hear it pretty clearly just by standing behind the front wheel. With the bonnet up, it's drowned out by the engine noise / injector clicking. It goes away eventually when the engine's warm. It's louder while idling.

It started as soon as I did my last oil change (shell oil). I dumped that oil and went for mobil 1. It's still there, but it goes away quicker. In both cases, the oil level was more or less correct (just a bit over) and the correct viscosity ratings (although the mobil 1 is thicker)

I read that people have similar noises related to the rockers and tappets (? whatever those are). I can't hear anything coming from the rocker covers and when I have the oil plug open there's only normal running noise (and I can't feel any air coming out either). I hear it more clearly if I stick my head under the car. Anyway, it seems to be related to oil somewhere.

My AFM is a little dodgy I think and is causing rough idling (I tried to clean it, but only made it worse, in typical fashion :O ). I cleaned a whole heap of crap out of the AAC valve. There's no aftermarket bov - the car's stock to the balls.

Any idea what it is? I'll be trying electrical contact cleaner on the afm as soon as I get some.

Airzone Rising Star

Airzone

Posted
  • Author
Posted

Yeah, I had some luck. My throttle body was caked in shit, so I cleaned that off with carby cleaner... However in the process, I put the TPS out a fraction I think, so I need to fiddle a bit more.

As for the tapping, it's worse now thanks to the last service at Mofo's-R-Us dodgy performace mechanics. I'm guessing I'll have to eventually take off the cam covers and clean out the lifters by hand. I just need to make the time for it. If you search the forums, there's an article about DIY lifter cleaning for a Lancer Evo engine, but it should pretty much be the same deal with the skyline - except just more lifters to clean :D

Nismo_286 Contributor

Nismo_286

Posted
Posted

Thanks... i will definitely look into it.

Btw, does TPS mean Throttle Position Sensor?

And what did Mofo's-R-Us do to your car?

Yeah, I had some luck. My throttle body was caked in shit, so I cleaned that off with carby cleaner... However in the process, I put the TPS out a fraction I think, so I need to fiddle a bit more.

As for the tapping, it's worse now thanks to the last service at Mofo's-R-Us dodgy performace mechanics. I'm guessing I'll have to eventually take off the cam covers and clean out the lifters by hand. I just need to make the time for it. If you search the forums, there's an article about DIY lifter cleaning for a Lancer Evo engine, but it should pretty much be the same deal with the skyline - except just more lifters to clean ;)

Airzone Rising Star

Airzone

Posted
  • Author
Posted

Mr. GTS4 - Normal I think... Between 2 and 4 on the stock gauge.

Nismo_286 - Yeah, that's it. Mister Mofo left a couple of hoses undone - like the host from the intercooler to the crossover pipe for example. That and the usual other things, and they only made my car worse ;)

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