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(Post Link) post #1 of 8 Old 03-10-10 Thread Starter
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Help (advice needed urgently)

My 147's 2.0 TS engine is using oil at an alarming rate, there are no visible leaks externally and the consumption rate is around 4 litres to 3000 miles when i first noticed ( i now keep an eye on it weekely topping up as necessary). The coolant has alot of gunk in and around the cap and the colour is severely dark, leading me to beleive that its leaking via the head gasket. im not loosing coolant though and there is no gunk in or around the oil filler cap. I have noticed a very distinct metalic rattle at low reves, not a grinding but a very high pitched almost exhaust like rattle (piston slap?) in addition to that a light has come on at start-up along with a warning message "motor control unit faliure". All these symptoms are bad news i understand but my question is where do i go now. Im not competent with a spanner and dont really own or have the time/space ect to do anything myself. Ive resigned to the fact im going to get an expensive bill (ive recently had the cambelt and thermostat replaced, Connection?) but im unsure weather i need a full rebuild or just to replace the head gasket (if that is the general consesus). The engine pulls fine and sounds lovely aside from the metalic ting low down the rev range. MPG is on the high side though.

Please help me ive tried to give as much info as possible.

Thanks

Freddy

Ps im located in the nuneaton coventry area if anyone fancies doing it lol
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gry
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Is it a bottom end rattle?
The timing could be out if youve just had the cambelt changed.
 
(Post Link) post #3 of 8 Old 03-10-10 Thread Starter
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Originally Posted by gry View Post
Is it a bottom end rattle?
The timing could be out if youve just had the cambelt changed.
the cambelt was changed by WAD in wolverhampton (an Alfa specialist) and the rattle wasnt present immediately after the cambelt change (4 months ago now) has only appeared relatively recently 4 weeks ago. Im more inclined to think its connected to the thermostat change. the thermostat was stuck open apparently and the temp guage never really reached operating level (90 ?) but would a mis-timed belt cause such oil consumption ? the coolant really is a filthy brown but no loss.
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Normal oil consumption according to Alfa can be upto 1 litre per 600 miles, although most engines don't use any where near that much.

It is advised to check the level weekly or after a long journey.

The rattle could be a loose exhaust heatshield, or a cracked manifold. If it is a cracked manifold it is often worse when the engine is first started and as the heat seals up the crack.

You also say the coolant is brown, it that because it has oil in it? if so you may have a failed headgasket or oil/water heat exchanger.

Giulietta 2.0JTDm (170), BMW 120d M sport
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yeah the coolant had gone a very murky brown and with the excessive consumption my self diagnosis is that the headgasket is leaking, allthough i was under the impression that i would loose coolant and that has not been the case. is the oil pressure higher than the coolant pressure maybe causing it to only leak one way.
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well it is as you say there is no gunk in the filler cap and that is one of the symtons of the head gasket going. so i would lean towards the possiblity of the wrong timing gear as previously stated.

My gta needed a new gasket at first the coolant pipe blew off the thermostat housing and lost all coolant so overheated. replaced pipe and coolant and within a few days the pipe blew off again the pressure increase in the coolant system from the gasket failing and the gunk was starting to form on the cap all this in the first 3 days of having her!!!

All sorted now tho
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Quote:
Originally Posted by flintsigs View Post
yeah the coolant had gone a very murky brown and with the excessive consumption my self diagnosis is that the headgasket is leaking, allthough i was under the impression that i would loose coolant and that has not been the case. is the oil pressure higher than the coolant pressure maybe causing it to only leak one way.
It may be worth getting the oil/water heat exchanger checked before condemming the head gasket, as it is a much easier fix.

It fits behind the oil filter at the front.

Normally if the head gasket has gone you will get pressurisation of the coolant from combustion gases. These tend to leave an oily film, but not a massive brown sludge. A brown sludge indicates oil and water mixing.
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Flintsigs - Did you get this resolved ? Having very similar problems with my JTS (heavy oil use, rattle) and I need to get it booked in. Might help me if I can give the dealer a nudge in the right direction. Thanks.
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