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Reply With QuoteSludged engine? How many kms, how often do you change the oil?
Take the oil cap off and look in there, can you see a shiny metal plate or is it covered in sludge?
Oil in throttle body?
My executive has been playing up lately not reving past 4500rpm in drive and not kicking down to first basically just being sluggish i thought it may have been gearbox and got that serviced but did not resolve the problem, i took the intake pipe of and there seems to be oil in the vacumm or whatevr hose it is and it has splattered into the intake pipe therefore going into the throttle body does anybody know what this could be? Help would be appreciated! Cheers
F O R U M W A R R I O R
Sludged engine? How many kms, how often do you change the oil?
Take the oil cap off and look in there, can you see a shiny metal plate or is it covered in sludge?
Originally Posted by moggy
Hey mate thanks for the reply,
I just looked then and yes its all sludgy, oil was changed about 7000KM ago.. and the pipe that the oil is going into the intake from is the pipe coming from the pcv valve it think.. Could it need a flush or am I looking at more serious problems?
Cheers!
Searching for the billion
I guess the VZ and VE alloytecs have more or less the same plumbing. I had my intake pipe off yesterday and found oil in it too. about 10ml of oil. Had a service about 2000 k's ago and they cleaned the throttle body - still looks clean, so they would have had the pipe off then too, and they didn't say anything about it. Is it normal or....
F O R U M W A R R I O R
If its sludged to the point of affecting engine performance then it could be pretty bad.
Problem with flushing the engine is the dislodged sludge can block the oil pickup and starve the engine of oil which will sieze it...
You can try engine flush just make sure its only at idle and if it starts to knock shut it down straight away. If it knocks it will need the sump removed and the sump and pickup cleaned out. Dump the oil and filter afterwards of course. Prob do this every 5000kms and see if it improves. Also get some carby cleaner and clean the throttle body out and get all the oil out of your intake piping and pcv lines with some degreaser..
Djabringyagrogalong
so you've found oil in your intake pipe? the length of piping that attaches to your throttle body?...and you think it's coming from that skinnier hose that goes into your intake piping..is that right? or have i missed something?...i think the vacuum hose your talking about is the breather hose...it's job is simple, when filling up with oil the oil runs past your valve train and straight down into the sump..breather hose is simply there to allow the oil to drop to the sump quicker without going glug glug glug.
what can happen is that where you got it serviced from, they could have filled your engine up with oil too quickly and its gone through that breather hose and into the intake, hence why you've found oil in the intake piping...or what will happen, over time oil will splash up into the breather hose and eventually make its way into the intake piping.
when i first got my car, about 5 months ago, it had oil in the intake piping, that was 72,000 kms worth...its not heaps, it was just slowly leaking into the intake piping, get a rag and wipe it down, i used carby/throttle body cleaner on a rag/paper towel to wipe it up...just make sure wherever you've used the cleaner, to flush it with water, these cleaners can bugger up the plastic.
long story short, if its coming from that little hose and it's only a little bit of oil, it's nothing to worry about...just clean it up and clean up your throttle body...as for having sludge in your engine, ricey is right about the engine flush..but if i was you..after running engine flush in your oil and you drop the oil and swap the filter, i'd be getting that sump off anyway to clean it right up, kerosene or prepsol (if you can't find it just go to repco and get the K&H wax and grease remover)...other then that, do exactly what ricey said regardin the engine oil flush, every 5000, if it knocks, shut it down.
hope this helped ya, cheers mate
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Thanks for the reply guys,
I have car booked in for tommorow to get serviced as its dues for its next one now. Apparently the oil is coming from the pcv valve piping but is comon if car gets a work out every now and then. Hopefully the throttle body clean up will help it and as for the slightly sludgy oil hopefully a flush and oil change will fix it. But could the oil up in intake be why it wont push past 4500rpm or drop down to first gear (unless im doing like 10km) its like it has a limiter @ 4500rpm. I thought it was the gearbox so went and got that serviced and they said it was perfectly fine.
Cheers!
Just some p-plater
sounds ok... but i'm a little confused as to why the oil sludge would in any way affect the revving of the car, and even moreso the way it down gears?...
seems like 2 different issues there... But thats just me
yer to me the shift and kick down sounds like a computer thing?
Alloytec Racing
Im confused, which side of the Throttle body, Intake Pipe or manifold side?
Manifold side could possible be blow by. How much oil, maybe some photo's would be good.. If you can get a photo of the oil on the Throttle body and the sludge on the oil cap..
Life starts at 200km/h
yer il get photos tonight , the oil is coming from the piping from the pcv valve which is on the passenger side of the motor and goes in the intake pipe therefore there is oil around the entry to the throttle body which i have already wiped off. Probably should have got a photo of that first! So yer it looks like oil has been gettign past the throttle body to as i removed vacum hose on mainfold side and it has oil on it. Not sure if thats normal. cheers guys
Alloytec Racing
that pipe comes from the rocker cover im pretty sure, pressure in there could be bad :S
Life starts at 200km/h
Banned
the throttle body should be a bit oily carbie/throttle body cleaner will fix that and help the idle valve if the oil comes back in a few days go to a mechanic with the oil you may have the wrong stuff in there for alloy tecs holden recomends 10000k changes
The Only 6sp VZ Wagon
im sure that will assist in draining the oil but a pcv hose is exactly as it says, Positive Crank Casee ventiliation, every spark ignition or compression ignition engine will have it, when the pistons move up and create compression some of that pressure will always pass the rings on the pistons, if the motor was completly sealed it would pressurise to the point where it will pop seals out and it will be a oil leaking piece of crap, i remember a magna once that has the pcv valve block and it pressureised and blew the cam seals out.... oil was leaking out of it everywhere.
this is where the pcv comes into play, all it does is allow the crankcase pressure breath back into the air intake, the crankcase air has pollutents in it, so the air is drawn through the motor burnt during combustion, its a simple emissions law, this is why you see 308, 253 old red blue straight 6's etc with just a breather on top, as the laws didnt restrict them to just venting to atmosphere at the time.
onto the oil sludge, there is a difference between sludge and tarnish, sludge is a build up of alomst black goo, normally have to scrape it off with a screw driver etc, normally that little plate under the filler neck of an alloytec will get a yellow to brown colour to it, this is normal and all it is the dicoloured oil mist settling around the areas of the motor and the carbon drying on there as such
EASTERN CREEK JCNSW 2009
Banned
also brethers in trannys and all other things with breathers allow for heat expansion
thanks heaps andyman,
do you think the problem of not going past 4500rpm could be a computer issue? or the fact it stays in 2nd and wont kick down to first?
cheers guys
Djabringyagrogalong
andymans got it right with the PCV valve...the contaminants in the crank case are all fumes and shit..the oil carries these contaminants too by the way, not just the pressure getting past the piston rings...the oil will get contaminated and break down as it gets used ( also, for anyone saying their oil is burnt, oil in an engine will never burn so long as the oil system is doing what it's suppose to..the oil will be dirty and can smell burnt, but it won't be)..the oil then releases this shit into the crankcase and a positive pressure occurs within...hence the name positive crankcase ventilation valve.
but for your case, im thinking your best bet to help us help you would be pictures...as for just commodores, i think we can only really help you on your oil problem, unless people have had the same transmission problem or are a mechanic themselves...i've seen alot of this gear shifting problem stuff..and a shitload of these problems are electrical issues...things like solenoids not working, trans computers buggering up etc...your probably gunna have to take that to a mechanic for diagnostics, then work out from there whether you get ripped off by holden, do it yourself etc
cheers bud
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I had quite a bit of oil in mine when I got it at 175,000km. Cleaned it up and the PCV pipe, fixed a vacuum leak from the A/C duct vac hose, and fixed leaks around the intake piping clamps (because someone put the bendy section on back-to-front !). Very little oil since - really just 'vapour' stains.
Maybe the way it was driven or the oil used or the vacuum/air leaks.
Take some pics when you clean it and I can add it to this post
Alloytech 175 Rough idle
now : 05 VZ Berlina V6
had : 97 VT Berlina V6
before : 81 VH SL/E I6
Hey guys, Got car back from mechanic turns out something was caught up around the throttle sensor or something. And the car was running @ 48% throttle he found the issue and now runs at 98% throttle. So much better. It does have a bit of a rough idle so i might also try cleaning intake and throttle body and the hose that comes from pcv valve. Is the PCV valve cleanable?
Cheers thanks for all your help
Alloytec Racing
Get yourself an oil catch can, then there will be no oil in the throttle body or blocking the maf
Life starts at 200km/h
hi guys
thought i might add to this discussion, i am a apprentice mechanic and these alloytecs r as u know common for sludging up if not serviced correctly. as for the oil in the intake pipe these engine are common for blocking the pcv piping and they are almost imposable to clean very easy to replace. this will cause the pressure in the crank case to increase pushing oil splash in to the intake pipe. also a common way of testing if they are blocked is to look in the oil cap or on dipstick and see if the oil is milky if so then moisture is building up from blocked breathers.
Hope this helps
Ian
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