PINK NOISE COMING FROM ENGINE ( TIMING BELT COVER)

SHAKILTZ

MEMBER
2001 TOYOTA MR2
130,000 MILES

Dear sir.

I have a mark II, GX110. I have the following issue with the car. There is a pink noise like a dry bearing noise coming from the timing belt cover.

Diagnostic. When I put the car on Drive, while the hand brake is on, and the brakes are on, if I race the car from rpm 1 TO 1.5, there is a bearing like noise coming from the cover of the timing belt, but if the rpm reaches 2 and above the noise is gone.

I have cleaned the injection nozzles, the plugs, I have added petrol cleaner solution to the tank for cleaning the fuel system. But the noise still remains. The timing belt is new and has no wear and tear at all.

Please guide me on what could be the issue, as I don't want to open and play around with the original timing of the car.

The car give me good mileage per litre ( on highway 10-11 km/litre without AC) on traffic ( 7-8km/litre). Engine is good, no leakage, no accidents, .

thanks
shakil

7 Replies

HMAC300

MECHANIC
48,601 POSTS

It may be the tensioner or one of the pulleys making noise. Was that stuff replaced or just the timing belt. Spray water on the fan belt an dif noise goes away replace belt and tensioner.

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Thursday, October 31st, 2013 AT 5:57 AM

SHAKILTZ

MEMBER
5 POSTS

Firstly the timing belt is new no wear at all. No breakage or cuts seen. Also the tensioner if it was faulty, even on neutral will make the noise.

When the car is neutral there is no noise even if you rave it to 2000 rpm. When you put on Drive and it goes to rpm 1000 to 1500 it starts taking noise like ping. Bearing like noise as if it was a dry bearing but when rave goes to 2000 rpm the noise disappears.

When I popped the cover, the noise is coming from the cover of the timing belt. We opened the timing belt cover, it has no tear and it has no leakage. Now a mechanic told me that it might be the timing of the engine. May be the timing has gone a bit off that is why it is making this noise?

I wanted to know. 1. Can slight timing of the timing belt create such a noise. And if so what other signs are visible if the timing is off.

Can you guide me on that. I dont want the mechanic to open the timing belt and screw up the original setting.

Thanks

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Thursday, October 31st, 2013 AT 8:21 AM

HMAC300

MECHANIC
48,601 POSTS

What I said was to spray water on FAN belt and see if it disappears. And I asked if ljust eh belt was replaced or was a timing belt kit put on. Normally that is what you do is install a kit I said nothing about opening the timing belt up. It may also be the alternator pulley if it has an overrunning clutch in it making the noise which may dissipate as revs increase. Fan belts and tensioners should be replaced every 60k

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Thursday, October 31st, 2013 AT 8:26 AM

SHAKILTZ

MEMBER
5 POSTS

Dear sir, sorry but I am a novice in this mechanical work. I really appreciate your input and your time.

Ok.

I poured water all over the fan belt and alternator. And the noise is gone. Thank you.

Now water + fan belt+ alternator = noise gone. So what is your diagnostic doctor.

I haven't changed anything in this car, but the previous owner I don't know what he did. So what would you suggest me to do. When I looked at the belts they are in mint condition no wear or breakage showing at all. When I turn the belt by force, there are no lines visible which shows that the belts need replacing.

Please advice.

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Thursday, October 31st, 2013 AT 9:05 AM

HMAC300

MECHANIC
48,601 POSTS

You shold spray not pour water over the belt but if the noise is gone then replace the belt and tensioner. Then check tosee if oyour alternator h as an overrunning clutch, it will lock up one way but not the other. You can go on site here and find belt routing under how to repair.