Gday all

Over the last fortnight my MY02 WRX has chewing through oil and I've noticed blue smoke at the exhaust when tapping the accel (while parked), also from the BOV (when vented, I have been leaving it closed but opened as a test) when decel and a little bit when removing the oil cap. Oil pressure light has been flashing at low revs (first time I've ever since this in 3.5yrs). Fuel efficiency 10-20% less this year compared to others. I've since topped up using Castrol GTX Modern Engine 10w-30 (is this suitable?) it needed at least 3 litres to bring it back up to the halfway dipstick mark. Car was serviced only 5-6 weeks ago.

Since topping up the blue smoke has almost vanished but another problem has popped up. The engine feels very shaky when accelerating (normal pace) like the timing is way out or a cyclinder is not firing correctly. When I slow down and decompress using the gears I notice the popping sound from the exhaust more than I normally would.

Would you say that prior to topping up I was getting 'blow-by' which was burning the oil and after topping up it's not firing correctly and dumping the fuel?

The oil looks a lot thinner compared to when I put it in yesterday and has darkened. The fumes from the oil seem to stand out more than normal so there could be fuel mixing with it..? The exhaust has a distinct smell also.

I'm hoping it's a clogged PCV. I have no idea if this has ever been replaced. Oil also seems to be climbing to the higher points of the motor out of the BOV and a bit of build up around the TMIC. The turbo was checked for leaks in the past I'm pretty sure but perhaps the seals have degraded since. No CELs and ECU reset hasn't helped.



Some history -

I had some issues about 6 months ago not being able to reach full boost, odd revving issues and the car feeling quite larthargic. Most of this has been since corrected but I'd thought I mention it just in case it relates to the issues that have cropped up recently. That thread can be found here - http://www.perth-wrx.com/vb/mechanicals/26014-not-reaching-full-boost.html

When I was having the issues earlier in the year ASG did mention lower compression on one cylinder which was the most likely cause for an intermittent rough idle??? I thought running my fuel tank to near empty may have contributed to this with "crap" getting into the system.... compression hasn't been retested since.

My clutch has been showing signs of wear (slipping in 3rd, 4th & 5th if put under load).

Idle is still rough and the car stalls easier when creeping (car parks, bumper to bumper traffic etc) but I think the clutch is contributing to this... my mobile mechanic also suggested oil may be getting onto the clutch from the rear main seal...

Any advice appreciated.


Daz

Excessive oil consumption and engine shaking points to rooted motor.

Put it on a trailer and get it to a workshop for a compression test on all 4 cylinders unless you have the equipment to test it yourself. Best not to drive it as you may be able to sell off some of the engine if it's not too rooted......

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No more GC8, sad face.
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3 litres to get it to the half way mark??? that means there was less then a 1 litre and a half in there!

dak dak boom

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I am only an asshole on the internet :)

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Bye bye ring lands..............

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

EJ207 in u go... with some nice ported heads

this motor's pretty much shiet.. detonated(blue-smoke).. and stuffed up.

and no u do not use 10w30.. it's too thin.

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GO APR

The car is booked in to get diagnosed at the end of the week.

Is the EJ207 the 2.5 litre? Is it a straight fit/swap? Got some reading material you can point me to?

If 10w30 is too thin what's more suitable?


Daz

207 is a 2 ltr boxer engine and 10W30 Fully Synthetic should be fine.

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Funny looking German Subaru

Castrol GTX Modern Engine 10w-30 is a semi-synthetic oil, definitely not suitable for your motor.

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GO APR

Looks like I'll be needing to head in this direction. No compression (atmospheric only) in the 2nd cylinder

$8000 for a fitted short motor and redone heads etc. This is half the value of the car!

Was planning to get a new car next year but this puts a damper on things. If I'm going to spend these dollars then I'd want to keep it for a few more years.

What's my options guys? Sell as is? Replace/rebuild with a new short motor? Replace will 2nd hand motor and sell? Other suggestions? What motors are avail at the moment?


Daz