Hi
I have had a search on this forum for similar problems but none for this engine.
I have a 2001 Omega 2.2 Petrol Auto with 45k miles. When its started from cold, the engine is quiet and smooth, but after 3-4 minutes of idling a metallic rattle starts to appear and gets progressively noisy as the engine gets warmer and at its most apparent at normal operating temperature. As soon as I accelerate over 1000 revs the noise goes, but on returning to idle, there it is again.
To date, I have changed the Cam Belt, both Pulleys, Tensioner and the previous owner assures me a brand new water pump was replaced at its 40k service (as recommended I find in HJ CBC Breakdown).
I'm really out of ideas with this and would appreciate greatly any help or pointers you may be able to give me.
Thanks in advance.....
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Hell of a guess, but could it be an engine mounting?
Thinking behind this - when cold, the engine runs at higher than normal idle. Regular idle causes most engine vibration (in your case) and slack mounting starts chattering.
I daresay someone will be along with something better.....
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Is it coming from inside the engine or outside ?
Can you gain some idea of where the noise is by listening with the bonnet open ?
I suspect that you'll find its something daft on the exhaust - dodgy bracket, loose bolt, touching the handbrake cable etc. etc.
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Dont know the car. But sounds like oil pump prob/oil pressure valve. poss weak supply to tappets other components..Just a thought?
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Was mech1
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I have a 2001 Omega 2.2 Petrol Auto with 45k miles. To date, I have changed the Cam Belt, both Pulleys, Tensioner and the previous owner assures me a brand new water pump was replaced at its 40k service (as recommended I find in HJ CBC Breakdown).
And there was me thinking this was the same 2.2 litre engine that\'s used in the VX220 and numerous other Vauxhall engine bays, and it having a camchain fitted, rather than a belt.
Can you confirm that it\'s a 2.2 litre, and not a type error?
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My 2 litre has a rattle which sounds a bit like this , which I'm fairly sure is the clutch on the aircon compressor. Have you checked that the rattle is there with aircon on and off; does it vary with elvectrical load etc?
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And there was me thinking this was the same 2.2 litre engine that\'s used in the VX220 and numerous other Vauxhall engine bays, and it having a camchain fitted, rather than a belt. Can you confirm that it\'s a 2.2 litre, and not a type error?
Ignore the confirmation. Upon *speaking* to HJ by email last night, apparately the 2.2 litre petrol engine in the Omega has a cambelt, not a chain. There was conflicting data in the CBCB for the Omega, which HJ has now amended.
The 2.2 litre petrol engine fitted in the VX220, Vectra and Astra has a chain, and I naturally assumed the same engine was also used in the Omega.
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Thanks for your swift replies guys, I'll try and answer as many as I can.
The sounds is definately coming from the engine and in my opinion sounds like a top-end type rattle. The funny thing is it 'sounds' like a loose timing chain, but its definately a belt driven engine.
I was interested to read about the oil pump possibility, but the warning light extinguishes immediately after starting and a careful peek under the oil cap while running shows plenty of oil being thrown about.
As for the fan belt driven components, I remedied this by running the engine stationary with the belt removed and the tapping is still there unfortunately.
I also thought about the possibility of a faulty water pump being fitted at 40k, so when I fitted the cam belt I checked the pump by spinning it and could find nothing out of the ordinary.
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It sounds to me as though you have tappet problems..Though wouldnt expect this on a 3yr old car. So may be wrong?
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Was mech1
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It sounds to me as though you have tappet problems..Though wouldnt expect this on a 3yr old car. So may be wrong?
That might depend on how religiously the previous owner changed the oil. If he stuck to the recommended service interval of (I think 20k), the hydraulic tappets could very well be showing signs of being gummed up.
Vic_Abbott, when was the oil last changed, and was the right spec used? Might be worth considering having it changed to see if it resolves things.
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Just a thought - does this engine have balancer shafts? My 2 litre Omega does have a rev dependant rattle; probably due to running for thousands of miles with the oil strainer in the sump partially blocked with crap. Unlikely on a low limer though, unless it has really been abused.
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Hi
Might be a daft question, but have you tried opening the bonnet?
My escort has started to develop a rattle (only audible from inside) at idle, when warm, but if you pull the bonnet open it stops, reducing the problem to one of a bonnet lever/bush.
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