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I Thought it was a noisy forged build but now I'm not sure?
I'm a little worried to say the least!
I've had the car a few months now,I love it to bits,it's a V3 STI with some nice mods.
On cold starts it's noisy,from my reading up I do understand that forged builds can be pretty noisy so I haven't been worried as when it's warmed up the knock/slap disappears,well that was until the other day
Now the noise does get quieter when warmed up but it's still there and seems to be getting worse every day.
I'm going to take a proper look at the weekend or next week if the weather permits and have done plenty of reading up over the last few days so I know where I need to start,I plan on doing an oil change and filter the old oil through some cloth to see if there's any metal bits in there which would indicate that it's the bottom end that's on it's way out.
Also going to check the cambelt tensioner as watching a few youtube vids leads me to believe it could well be this causing the knocking? But would this get quieter as the engine warmed up??
The knocking is only there at idle and below 1500RPM
What else should I be checking?
If it's a failing con rod would this also leave metal bits in the oil?
I do have some electronic detcans I've made so could use these to check areas of the engine to track down the noise,so have you any tips on where to check and what to listen out for?
my m8s is the same theirs about 30 thou piston clearance
It's done about 30k on the build and was done in 2008,when I got the car a few month back it was noisy from cold but now the knocking is there even when warmed up,it's not really loud when warm but as it's only just started doing this over the last week then it's started to worry me.
Does your mates still knock when warmed up?
same as mr Gambit here with my forgies, noise seems to change a little as it warms up but it's always there. If the sound has recently changed though it does no harm to investigate a little anyway - have you noticed any changes in the logs, extra knock events or anything strange occuring?
I've not done much data logging recently and since I started hearing the knocking when the car's warmed up I've not been on boost much,the logs I have taken tho all look as normal and the only knock events I'm getting are 3-4 every time on a cold start up.
I have just replaced the knock sensor as the old one was faulty,I was going to relocate a bit higher up but ended up putting it back in standard location.
I wasn't worried at all about the slappy engine when cold but I've only just noticed it now making the noise when fully warmed up and I'm sure it's getting louder?
Cheers guys,I guess the only thing to do is stick my head under the bonnet and have a good poke around,I'll get the detcans rigged up to see if I can track down any specific area but I'm guessing if it is just the noise of a forged build then the noise will be even on all cylinders ??
Not sure banny,I've still not got around to fitting my gauges,I have 3 to fit so this will be on the list of jobs to do next week! What pressure readings should I be getting and what kind of numbers should worry me?
Not sure banny,I've still not got around to fitting my gauges,I have 3 to fit so this will be on the list of jobs to do next week! What pressure readings should I be getting and what kind of numbers should worry me?
Will depend on the clearances used on the build, mine shows 6 bar at cold idle and hot idle is about 2.7/2.8bar, will check on boost oil pressure next time I drive it
Will depend on the clearances used on the build, mine shows 6 bar at cold idle and hot idle is about 2.7/2.8bar, will check on boost oil pressure next time I drive it
Cheers
As it's a 2008 build then no idea what clearances were used,it's an off the shelf Graham Goode short block so i will contact them to see if i can get any info.
Hopefully you're just being paranoid bro and all is normal
Cheers pal
I'm on my 4th classic and this one(maybe because it's new to me) does make me paranoid ffs,I need to get a grip haha!
Never felt paranoid with the others but this one's pretty highly modded,the others were very standard.
My Terzo had the bottom end let go on me but that was like an instant boom and this noise I've got now is somewhat different,it's just strange that it's still knocky when warm now where as it wasn't when I got the car.
Yeh never thought of it like that mate,stupid cold weather!
I will put some fresh oil and a filter on next week and get those gauges fit then i can carry on enjoying the car and get back to tweaking the map and see if i can squeeze a bit more power out
is this after your oil change ?
if not have a damn good look at the old oil when it comes out, sure sign of bad things about to happen if you have metal shavings in the old oil.
is this after your oil change ?
if not have a damn good look at the old oil when it comes out, sure sign of bad things about to happen if you have metal shavings in the old oil.
No i will be doing the oil change next week and will filter the oil to see if there's any metal bits floating around in there.
Yes jay horrendous is a good way to describe when cold!
It only uses a little oil,but has a slight oil leak from somewhere,looks like rear crank oil seal,which is a surprise as it's had a recent 6 speed conversion and would have thought a new seal would have been fitted at the time?
Car is on fuchs oil atm but will be swapping to millers and fitting some gauges next week,at least then with all them gauges fitted I can step my paranoia level up
could be the timing belt tensioner, Ive had 3 scoobs now and every one made a piston slap like noise when the the tensioner/belt needed replacing.
I think I will get the timing belt done next week too,it's only done 30k on the rebuild but with that being 8 years ago and don't think it's had a fresh one since then it's a good idea to get it done.
Hopefully its nothing to worry about bud, but suggest getting that oil pressure gauge fitted, anything below 2 bar at hot idle then thats when you start to think big ends are going, anything above 2 bar, all good (As long as everything else is as it should be, oil pump working correctly etc
Hopefully its nothing to worry about bud, but suggest getting that oil pressure gauge fitted, anything below 2 bar at hot idle then thats when you start to think big ends are going, anything above 2 bar, all good (As long as everything else is as it should be, oil pump working correctly etc
Cheers mate.
There's a good guide on here to fitting gauges so should be pretty straight forward.
Mine gets a little "rattley" when fully warmed up, its a two-year-old build by a very much respected builder. I bought a mechanics stethoscope with a probe and eventually pinned it down to the alternator. Waste gates can rattle if worn or the actuator isnt adjusted correctly apparently. I think engine parania goes hand in hand with ownership if you have an ounce of mechanical sympathy.
Hopefully its nothing to worry about bud, but suggest getting that oil pressure gauge fitted, anything below 2 bar at hot idle then thats when you start to think big ends are going, anything above 2 bar, all good (As long as everything else is as it should be, oil pump working correctly etc
Again get that pressure gauge fitted. I would add that if the gauge flickers up and down that can indicate a problem. If the gauge works smoothly indicating different pressures but in a measured controlled smooth way then usually all is good. (Hard to explain but hopefully you get my drift)
I would check cambelt tensioner first
Hope you get it sorted
Really dont wanna worry you but get it looked at rather than driving it, I got a call from my mate last night about his RA, "car has just died mate coming up to a set of lights...just lost power and noticed coolant on the floor after", I went to look at it today and stripped it down,
He said he thought he'd heard a noise ...looks to me the water pump bearing failed which in turn moved the belt to wear through the cam covers before the pump pulley dismembered itself through the cover too, just gonna try a pump and belt...time it up and hope for the best, saving grace is he was tootling along to a stop
Last edited by The Pink Ninja; 30 January 2016 at 10:58 PM.
29 January 2016, 09:17 AM
I Thought it was a noisy forged build but now I'm not sure?
