Oil Heat Exchanger - 147 Oil Leak - Alfa Romeo Forum
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Old 30-12-09
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Oil Heat Exchanger - 147 Oil Leak

Hi All,

I have alot of oil located around the oil filter of my alfa. It is absolutley everywhere and has also seaped into the cambelt enclosure area which i would prefer not to have, as hydrocarbons and rubbery materials donot mix (especially as i am fitting a new cambelt). I have looked around on numerous forum pages and sites and have become disheartened as no specific information except by a new heat exchanger.

I have subject the excanger to a low air pressure test and submerge in water with the result of no air bubbles present.

Is it known that the link between the engine block to heat exchanger adapter is not entirely oil tight?

Also, if i by pass the heat exchanger how would this effect the car and temperature. Has anyone done this before and if so could you tell me the effects this has had.

Thanks
edward
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  #2 (Post Link)  
Old 30-12-09
CraigM
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I would clean it up as best you can and then take it for a short drive and have a look and see if you can source where it is leaking from. I'm assuming the oil filter has a good seal on it?
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Old 31-12-09
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Originally Posted by e.shulver View Post
Also, if i by pass the heat exchanger how would this effect the car and temperature. Has anyone done this before and if so could you tell me the effects this has had.
I drive my TS already 2 months that way.
http://i1020.photobucket.com/albums/...5/IMG_4150.jpg
http://i1020.photobucket.com/albums/...5/IMG_4149.jpg
I have separate water temp sensor installed, oil temp and press too. Absolutely no visible change in the way water and oil warms. Temps also in normal range.
Friend of mine has faulty exchanger, water mixed with oil, he open and rebuild his engine twice before able to fix this. 1500EU expenses for 10EU part.
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Old 31-12-09
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I've got a used heat exchanger, if you want that... Easy enough to fit. Disconnect water pipes, remove filter, undo 21mm (IIRC) nut under it, remove exchanger. Refitting is the reverse etc etc!
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Old 02-01-10
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Originally Posted by iainfm View Post
I've got a used heat exchanger, if you want that... Easy enough to fit. Disconnect water pipes, remove filter, undo 21mm (IIRC) nut under it, remove exchanger. Refitting is the reverse etc etc!
Thanks i may take you up on that.

I have done a test on the exchanger by putting a low pressure on the input and sealing the output, Then submerging under water, Absolutely no air leakage.

Unfortunatley i have to abandon my car at my folks place for the next three weeks as my time away from work has come to an end. Back to a small economic engined family car for a while!
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Old 15-01-10
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ive noticed this on mine gonna whip it off on sunday and give it a dose of rtv silicone sealant see if that cures it also noticed since i dropped the oil last that theres a little seepage from the oil drain so ill prob drop the oil and gunk that up and add a new seal
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Old 16-01-10
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Originally Posted by monsterob View Post
ive noticed this on mine gonna whip it off on sunday and give it a dose of rtv silicone sealant see if that cures it also noticed since i dropped the oil last that theres a little seepage from the oil drain so ill prob drop the oil and gunk that up and add a new seal
Let me know how you get on and if it solves the problem. One week and i can get back to my car and sort it out!
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Old 16-01-10
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Are you sure it is the heat exchanger and not the balance shaft oil seals?

It can run down and onto the heat exhanger making it look like it is leaking.
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Old 17-01-10
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Originally Posted by symon View Post
Are you sure it is the heat exchanger and not the balance shaft oil seals?

It can run down and onto the heat exhanger making it look like it is leaking.
Not sure yet. havent had her running recently. But i beleive it is not this as i have a small gap where on the cambelt/ balancer belt covers and oil has got into that and the oil mark can be seen migrating in a downward pattern.

When i get her running again ill get leave the belt cover off until i can verify that its not the balancer shaft oil seals.

Thanks for the suggestion Symon.

Has anyone had the headgasket go causing the oil leakage? The compression is still reasonable for the car.

Cheers.
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  #10 (Post Link)  
Old 19-01-10
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got dragged out shopping to the trafford centre complete waste of time so waiting for weekend to come free now as the cars never here !!!
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Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Alfa 147, 156 & GT

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