Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: rodney on 27 January 2010, 03:11:32
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hi people , i just bought a p reg 2.5td estate,
it starts fine and runs well and smooth , but has a noise that seems to be coming from the injector pump on the engine(passenger side front) ,
it sounds like the actual pump when i listen to parts ov the engine with a stefascope ,
the noise seems to be in a repetative rythym that gets faster as engine speed is increased but dont seem to get much louder,
last owner had the car a while and reckons the noise has been like it for a long time and aint got any worse , after doin 100 miles myself it has stayed the same ,
what im wondering is ,
is it most likely to be the pump or the chain side of things?
how hard to swap any coded parts over if i fitted a secondhand pump?
im a mechanic by trade but havent done one of these engines before,
any help will be appriciated :)
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all diesel engines make abit of noise but would think it may need an oil change and see if it makes it go away. i dont know off hand but it may also be the rubber in side the pump may have a pin hole in it but not sure.
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Where are you at mate?
You need to update your profile - someone may be close to hand for help etc.
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Could possibly be the auxillery belt tensioner. Try removing the belt and running the engine to rule it out. If its definately coming from inside the cover it could be the chain guides.
There are more knowlegable people on here than me though, so im sure there will be more suggestions
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im in north london ,
yeah i thought alt belt tensioner etc but its deffo comin from the pump ,
it sounds like it could either bechain/tensioner or the pump , it does sound like its pump tho :(
it was a cheap run around car so i dont wanna go nuts on it but it drives nice so would be nice if i could keep it for a while ,
ive noticed a few people have chipped their td's how much is a chip and how much improvement does it give?
:)
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im in north london ,
yeah i thought alt belt tensioner etc but its deffo comin from the pump ,
it sounds like it could either bechain/tensioner or the pump , it does sound like its pump tho :(
it was a cheap run around car so i dont wanna go nuts on it but it drives nice so would be nice if i could keep it for a while ,
ive noticed a few people have chipped their td's how much is a chip and how much improvement does it give?
:)
If it's just rattly, I'd try giving it an oil and filter change, run it for a few hundred miles and then do it again. Avoid using engine flush treatments. Oil change interval is 4,500 miles at the very maximum.
P.M The Boy re: Chip price etc. Don't know if there's a minimum post count requirement, as it's much cheaper than any others I've seen advertised. For the improvements it gives, it's a no-brainer.
Manuals can be chipped no problem, but autos with the std AR25 box need to be up-graded to an AR35 box. AR25's can't cope with extre power.
My previous AR25 autoboxed Mig didn't last 200 miles ::)
Ups it by about 30 ponies. Driveability improves all round. More hoof-ability and more MPG.
Welcome to the madhouse. :y
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tbh mate i reckon its the injector pump tensioner ,
if so ill leave it to rattle away lol ,
if it was the pump it would run shit but its spot on at the moment,
i dont keep cars long so see if i keep this one for a while , if sos i might look more into a chip for it ,
is the boost on these controled by a ecu bleed valve? or the older method?
in other words if i put a chip in it then the ecu would raise the boost itself or would i have to do it via ajustment or bleedvalve?,.
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tbh mate i reckon its the injector pump tensioner ,
if so ill leave it to rattle away lol ,
if it was the pump it would run shit but its spot on at the moment,
i dont keep cars long so see if i keep this one for a while , if sos i might look more into a chip for it ,
is the boost on these controled by a ecu bleed valve? or the older method?
in other words if i put a chip in it then the ecu would raise the boost itself or would i have to do it via ajustment or bleedvalve?,.
The boost is not ecu controlled, it uses a mechanical wastegate. Ancient technology ;D
Chips work by fuelling
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If it's a noisy pump, then it's possible that a previous owner has actually refuelled the car with petrol.
Many thousands of miles later, I know of one that's still running fine - though obviously with a noisy injection pump!
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could be what has happened ,
so if i fitted chip would i need to up the boost too?
ive never chipped or modded a diesel engine yet,.
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could be what has happened ,
so if i fitted chip would i need to up the boost too?
ive never chipped or modded a diesel engine yet,.
I probably wouldn't up the boost on that engine much. We did tweak Omegatoys a shade, but ever so easy to overdo it. I'd stick to the chip initially
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could be what has happened ,
so if i fitted chip would i need to up the boost too?
ive never chipped or modded a diesel engine yet,.
I probably wouldn't up the boost on that engine much. We did tweak Omegatoys a shade, but ever so easy to overdo it. I'd stick to the chip initially
true¬ and then when i was bored one day i tweaked it a little more, then a bit more an then a bit more!!! however it was to far by then, as when it hit boost it just spun the rear wheels and pulling away smartly the car just left clouds of smoke from the tyres !! so i back it off from 2.7bar boost to around 2.0 and its quite happy there,but im fairly sure the high boost slightly overheated or damaged the turbo vanes as nowadays instead of boosting at around 13/1400rpm it takes until 18/1900 before any appreciable boost can be felt?!!or maybe im just used to it? pretty sure its a tired turbo tho!! so be careful it is very easy to overdo it :y
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not wanting to be thick or anything but how do you up the boost preasure :question
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either wind the acutuator in or fit a bleed valve ,
i hope you realise that 2.7bar is like 38ish psi! lol , a standard petrol turbo only runs about 8-10 psi out the box ,
so prob way to much for the turbo lol ,
mine cuts in about 2k and makes noticable boost about 2.5k
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either wind the acutuator in or fit a bleed valve ,
i hope you realise that 2.7bar is like 38ish psi! lol , a standard petrol turbo only runs about 8-10 psi out the box ,
so prob way to much for the turbo lol ,
mine cuts in about 2k and makes noticable boost about 2.5k
yep know that, diesels take higher boost than petrolmotors anyway, but it was just alittle experiment ;D worst thing is these engines do not have a rev limit they just keep revving till they blow or put a rod through the side!!! on the mot test i always warn them!!! then when they try it they csnt believe how fast it revs for a diesel, :o im ok though as i can monitor the boost using me tech1 to see inlet temps as well as boost pressure, i sure wouldnt play with the boost without it!!! you have been warned people!!
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When my 2.5TD was running (those were the days :-[ :-[) I had a rattle from the front of the engine. I was sure it was the tensioner mechanism. It has a bush at one end which on mine had gone oval shaped.
But after unsuccessfully searching around for a replacement I decided to get a bit deeper into it and discovered it was the power steering pump had become loose. Tightened it up (mounting bolts at the rear of the pump, 11mm head IIRC) and it was quite as anything. Worth a try, doesn't cost anything????