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engine noise


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6 replies to this topic

#1 hebrewhammer

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Posted 10 February 2009 - 02:12 PM

have a 94 impreza and notice a slight gear noise coming from the engine at idle but goes away when reved. should i be worried about this...

#2 nipper

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Posted 10 February 2009 - 05:50 PM

How many miles?

Spray the acc drive belt with some water and see if the noise goes away. if it does it can be the alt/ps/idler on that belt.

When was the last time the timing belt was done and what was changed with it?

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#3 hebrewhammer

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Posted 11 February 2009 - 10:57 PM

150k on the car.
not sure on the timing belt. but going to change it this weekend.
sounds a bit different on the left side head than the right in terms of clicking.
Going to adjust the valves this weekend also.

#4 nipper

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Posted 11 February 2009 - 11:02 PM

If its unknown, then your going to do the entire timing beltthing:

water pump
cam seals
main seal
idler
tensioner
re-seal the oil pump.

Its quite possible what your hearing may be a tensioner/idler giving up the ghost. Dont drive the car till you get to inspect those parts. If they let go then can do lots of engine damage.


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#5 grossgary

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Posted 11 February 2009 - 11:07 PM

Track the noise down a bit, front of engine, back, trans, sides? Should be able to narrow it down for sure.

Any difference in gear or out of gear?

Ebay has timing belt kits for only $80. Includes the belt and all new pulleys and tensioner. By this time I would guess most, if not all, of your pulleys need replaced anyway.

#6 hebrewhammer

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Posted 12 February 2009 - 02:02 AM

Now i am hearing a very faint higher pitched screal.
not driving the car till i figure it out.
I can only hear it when i'm driving/ sitting in the the car. when i listen in the engine bay i can't hear it.
Can hear in gear and out of gear, speeds up as rpms climb.

Edited by hebrewhammer, 12 February 2009 - 02:07 AM.


#7 nipper

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Posted 12 February 2009 - 10:04 AM

can also be a failing water pump. Take off those timing belt covers and inspect it.


nipper




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