Vicky.

Hi,

Just bought my '04 impreza WRX STi and I've noticed that there is a tapping/ticking sound on idle but it's irregular. It will sound momentarily then disappear before reappearing etc. Engine temp has no effect on the sound and it's just been serviced top to bottom.

The dealer suggested that it could be a noisy EGR valve or boost solenoid. Just wondering if this is a common issue on these or whether it could be something more serious?

Thanks in advance.

Vicky.

the shreksta

iTrader: (20)

injectors

nick172sport

iTrader: (6)

didthey do the oil change correctly

poolio74

Does it really sound like bottom end???

Not everything is down to a bodged oil change....Fcukin cracks me up this site at times.

**jay**

iTrader: (1)

Check the boost control on the driver side turret, can tick like mad and quite normal

Matt23

Boost solenoid, I had the same thing happen on 1 of my cars, just needed a good clean and it was fine.

Vicky.

Well they took a spark plug out and filled it with 5ltrs so I'm assuming all is well.

Yes the oil change was done correctly besides it was doing it pre and post oil change.

I'll take a look at the boost solenoid in that case and if not move on to the injectors. Start small and all that.

Thanks for the advice!

gazzawrx

iTrader: (11)

Whats the mileage?

Hawkeye D

How do you clean a boost solenoid?

Vicky.

It's just coming up to 81k.

gazzawrx

iTrader: (11)

Could be a bit of piston slap?

Get yourself a long screwdriver or stethoscope if you can happen to put your hand on one and have a listen round the engine bay and see if you can determine where is coming from, try it on the boost solenoid too, youll hear it ticking through the screwdriver if it is that.

You can clean it with some brake and carb cleaner.

poolio74

"Engine temp has no effect on the sound" Not piston slap then. Also piston slap doesn't sound like a clicking noise. Must do better

gazzawrx

iTrader: (11)

All depends how bad the slap is, we are talking blob sti here which essentially have forged pistons and he also said tapping sound.

Blob sti's dont have egr valves mate, im pretty sure it was hawks onwards that got them, so it wont be that, whats it like after a good run down the motorway?

Sideways Simon

I doubt it's piston slap unless a built motor,only new age cars to have forged Pistons from factory were V7 Possibly the Wrx NB and some jdm Hawkeye limited cars the rest had hypereutectic inc your Blobeye.
Timing belt idler issue maybe ? you need to narrow the area of the noise or take it to a specialist

FlatoutDave

oh dear oh dear