Big End

[petrolheadjman]

Ok i have used search but didn't find quite what i was looking for.

I am a bit of a noob on this so please go easy haha

Anyways i think my big end is going (nugga nugga) and wonering what my options are with getting it sorted? ie can i replace the short block? or find a whole new engine

I have a non turbo TS-R bh5 legacy btw and for now want to keep it non turbo as i don't have a huge budget

thanks for any help

[Flat4]

 petrolheadjman said:

Anyways i think my big end is going (nugga nugga)

From what I've heard a big end failure should be pretty obvious. What are the symptoms and sounds that it's making?

Does the noise go away when the engine is warmed up? If so it could just be piston slap which is pretty common with higher mileage Subaru's

[petrolheadjman]

would the noise be quiet at first and when it goes get real loud? or does it kinda just happen

[Drunkenmonkey]

are you lacking in power?

[petrolheadjman]

na not really

am i just being paranoid and not worry about it?

[Drunkenmonkey]

big end nugga will lack in power.. can you post a video up??

[petrolheadjman]

yup, will record tonight / tomorrow. I hope its just piston slap

[petrolheadjman]

vid of engine, was cold at the time

[funkytown]

Doesn't sound like big man man.

[petrolheadjman]

piston slap?

[Drunkenmonkey]

you see the funky vaccum valve thing on the manifold when engine is running push it open with your fingers, my partners b4 does the same thing and goes when running and goes when you push it by hand

[Stoffa]

when was the last time the cambelt and waterpump were changed?, sounds more like a bung roller bearing to me, but I'm no mechanic

[GC8E2DD]

 petrolheadjman said:

vid of engine, was cold at the time

Your Legacy purrs like a kitten compared to my Impreza. Your camera work just about made me fall off my seat.

[gtb36]

 funkytown said:

Doesn't sound like big man man.

I 2nd that ^

[WRXONP]

nah thats deffo not a big end man...a big end sounds like a repo man knocking on your front door LOL LOL...and he knocks fast and hard LOL

sounds like lifters to me...whens the last time u changed the oil?

[petrolheadjman]

 WRXONP said:

nah thats deffo not a big end man...a big end sounds like a repo man knocking on your front door LOL LOL...and he knocks fast and hard LOL

sounds like lifters to me...whens the last time u changed the oil?

Around 5k km ago iirc. I will be doing an oil change shortly, going to order some MBL8 to put through it

[WRXONP]

i hate that shit bro...

just run a good engine flush through it (as per instructions) and then change oil and filter...

[petrolheadjman]

recommendations for an engine flush product?

[pedro]

Could be a roller bearing squelling.Posibly timing belt idler bearing or alternator bearing.?

[DRFVDR]

A good flush is to run a 50 50 mix of ATF and engine oil

[petrolheadjman]

 DRFVDR said:

A good flush is to run a 50 50 mix of ATF and engine oil

And just do this before an oil change?

I was reading up though, and somewhere it said that this can be dangerous if you have a car with high k's (as i do) because large clumps of shit can dislodge and clog up your fuel system. How true is this?

[WRXONP]

fuel system in the oil lol??

nah man STP engine flush (in a red bottle) works really well have used it in alot of cars ive owned..cleanes the inside up like brand new plus it keeps your new oil gold for aaages...if it is your lifters making noise the engine flush will normally unblock the ports on the hydraulic lifters and get all the gunk out...if your engine has lifters that is ???

could be cambelt bearings ?

use a screw driver (a pretty long one) and stick it on the actual cylinder head it self and tell us if u can hear the exact noise through the screw driver... also place the screw driver in different spots ie alternator,cambelt cover in various places etc etc...screw driver works like a stethoscope

[DRFVDR]

any sort of a flush can dislodge crap

wont effect fuel system as it is oil in the crankcase not fuel in the fuel tank

run i for a few K's then change to regular oil...

I run diesel oil in my cars as a/ I get it for free and b/ it runs more detergents so helps to keep the engine clean

[petrolheadjman]

 WRXONP said:

fuel system in the oil lol??

nah man STP engine flush (in a red bottle) works really well have used it in alot of cars ive owned..cleanes the inside up like brand new plus it keeps your new oil gold for aaages...if it is your lifters making noise the engine flush will normally unblock the ports on the hydraulic lifters and get all the gunk out...if your engine has lifters that is ???

could be cambelt bearings ?

use a screw driver (a pretty long one) and stick it on the actual cylinder head it self and tell us if u can hear the exact noise through the screw driver... also place the screw driver in different spots ie alternator,cambelt cover in various places etc etc...screw driver works like a stethoscope

Lol sorry i'm just learning

Ok will give that a shot tonight thanks for all the advice btw guys, just really sucks hearing my engine sounding like this

[WRXONP]

its not really that bad lol ive had way worse noises than that!!!

but yeah deffo check that the noise isnt the cambelt cos you dont want that sucker snapping on ya....