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Discussion Starter · #1 ·
We have an EVO IV that has been going very well. Standard except for HKS dump valve.
We went for a drive after warming the car up, after approx 2 miles there was a whine on acceleration. The whine seems engine related not road speed rleated (put it in neutral whilst driving, on tickover, no noise).
When you blip the throttle the whine gets louder as the engine revs faster.
Any suggestions?
Car has had a bit of a flat spot from standing start before this happened (i thought it was plugs needed changing/gapping or a tune needed).
Whine came out of the blue.
Any help would be appreciated.
Cheers
Kevin
 

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my IV engine done that aswell. only when cold but dissapeared when warmed up. get your belts changed along with your tensioners.
 

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a knackered turbo will be more noticed on boost rather when in neutral. what you have sounds like what i had.

theres also a belt guide on the evo. when i got mine serviced the lube had came out the bearings in the tensioner and guide and had spatted all over the inside of my belt cover. this caused to the bearings to dry out and make a whining noise.

i had to get a new engine soon after that service as when getting it done the mechanic noticed that my car had crankwalk. the new engine is nice and quiet :D
 

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Discussion Starter · #5 ·
Do you mean the altenator belt tensioner that was drying out. Seeing as there is a cam belt (not chain), then there would not be a tensioner on the belt.
We will nip the cat to our local friendly mitsubishi dealer this week.
Thankyou for (sort of), putting my mind at rest.
Cheers

Kevin
 

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kevchard said:
Do you mean the altenator belt tensioner that was drying out. Seeing as there is a cam belt (not chain), then there would not be a tensioner on the belt.
We will nip the cat to our local friendly mitsubishi dealer this week.
Thankyou for (sort of), putting my mind at rest.
Cheers

Kevin
ofcourse the cam belt has a tensioner. it has a tensioner and a guide which are lube filled roller bearing units.

the altenator gets tensioned by turning a bolt which pushes the altenator further away from the engine.

:smthumbup

if i were you i'd look for a good specialist near you. they will know the car better and probably be cheaper
 
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