hi, ive got a 2001 wrx impreza on 99,000, car has been perfect for a year, but today i jacked her up due to having a squeek so i had all 4 wheels up in the air started her up gave it a little rev and had a terrible knock coming from the engine. the car was jacked up level so no chance of oil starvation, im expecting it to be either big ends or mains but was just after some help, thanks

 

could be anything fella, but does sound like big ends, maybe put a you tube search in for big end failure/knocking on imprezas to see if its the same noise.

if its big end failure only options are a rebuild or replacement.

 

ive just had a look on youtube, all of the big end videos are knocking on tickover mine only does it from 1500 rpm onwards... how much do you think a rebuild kit will cost? cheers

 

Do you mean you ran the engine in gear with all 4 wheels off the ground ?

Shaun

 

no idea fella ask one of the engine guys on here, if its standard and you have no plans for power upgrades possibly a second hand engine would be cheaper.

 

you need to get the problem(s) diagnosed by a professional mechanic first. do the usual, check the oil level & coolant and make sure fluids are OK and it is not suddenly using them.

Can you get a clip of the problem posted up (via youtube?) could be as simple as a heat-shield broken and vibrating or sticky lifter.

Best driven carefully if at all in the mean time.

 

Yeah I had all 4 wheels spinning in the air... I checked all fluids and they were all ok, I had a mechanic have a quick listen and all he said was its fu*ked!! I'll get a video clip tomorrow, I'm not driving the car now,

 

Broken pulley/idler can cause a similar sound to the dreaded knock, get a reputable subaru specialist to confirm the sound first before trying to get it fixed.

 

All good advice from people above, you need to get someone who has experience of Subaru knocking engines to listen to it as there are a lot of noises that can sound the same.

A stethoscope can help locate where the noise is coming from, as it could also be a number of other things.

A bottom end knock will come from the centre line of the engine (front to back) low down and makes a rattle, as opposed to a tap. How severe the rattle is depends on how worn the bearings are and if they are still in place or have spun out. It will obviously get faster with the revs, and can sometimes seem to drift away then come back again.

Try not to drive it at all now as the worse it gets, the more chance of you needing a replacement crankshaft, which just adds to the cost.