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Discussion Starter #1
I have a civic 1.5i LS. I have recently noticed an annoying hissing sound coming from the engine bay whilst driving.
The 'hiss' does not happen when the car is stationary and i just rev the engine.
It just seems to be when in 2nd, 3rd or 4th when the engine is under load.
I thought it may have been the exhaust, so i had it replaced and no difference, i was told it could be the cat or manifold, so i had them replaced. Still the annoying hissing noise is there
Can anyone help please?
 

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hey mate, not 100% sure on this one, but check when ur last cambelt was done and if the CAM was tightned too, it could be the cam tiself isnt fully tight.

Nuno.
 

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Discussion Starter #3
it was replaced at 80'000 miles, and it has now done 88'000. So i doubt it would be that. I will check it anyway.
Wouldnt it hiss all the time if it was the cambelt tho, even just ticking over?
 
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