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Oil in coolant bottle
Posted: Sat Oct 13, 2018 10:04 am
by Cupraderv
Here we go again, just spent a fortune getting the car motd, went to check coolant for antifreeze and find oil in the coolant bottle, not sludge just like clots of oil, checked dipstick all ok, not overheating driving ok, what can cause this, remember a mate had similar problems with an oil cooler fault, anyone know

Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 10:14 am
by MIDZ
Yip, looks like there is a small primary oil cooler bolted on the side of the engine block which coolant passes through, if this is cracked internally it would cause oil to mix with coolant.
Generally with burst oil over water coolers the oil mixes with the cooling system first as oil circuit has the higher working pressure over coolant. You could drain the cooling system and see what comes out, then decide whether to re-fill and keep an eye on it. I'd replace the oil cooler asap you don't want the coolant to go the other way and mix with the oil

, I found a part no but not sure if it's correct 079 117 015P
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 5:28 pm
by Cupraderv
Good lad will check that out,thinking of changing the cooling rad and pipes as well
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 5:29 pm
by Cupraderv
Taking to D H Automotive
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 6:56 pm
by MIDZ
Cupraderv wrote: ↑Sun Oct 14, 2018 5:29 pm
Taking to D H Automotive
Heard good reports on DH Auto from a friend, although I've not used them....yet. I've only heard of oil cooler hoses leaking, there's a good few threads on here on how to get them off as they seize

Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 7:09 pm
by Cupraderv
Aye they are a pain in the arse lol
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 7:19 pm
by MIDZ
Cupraderv wrote: ↑Sun Oct 14, 2018 7:09 pm
Aye they are a pain in the arse lol
Probably, I think most change the hoses and cooler because they can't slacken the seized hoses off and end up damaging the cooler connections. If & when mines leaks from hoses I'd use a Dremel with cutting disc to remove the hose connections and save the cooler. What's the point in replacing the cooler if it's only the hoses that have perished with age and started to leak
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 9:45 pm
by Cupraderv
Ye true, getting them to check mine, and see what it needs. Spent a fortune on it the last couple of weeks
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 9:46 pm
by Cupraderv
Do the hoses have to come from Audi
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 10:07 pm
by MIDZ
Don't think so, they'll be options to buy non-oem hoses from somewhere which will be just as good if not better. Do a bit of searching on here and you'll find what make others have fitted.
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 10:07 pm
by Cupraderv
Cheers mate
Re: Oil in coolant bottle
Posted: Sun Oct 14, 2018 10:09 pm
by MIDZ
Cupraderv wrote: ↑Sun Oct 14, 2018 10:07 pm
Cheers mate
Re: Oil in coolant bottle
Posted: Mon Oct 15, 2018 12:16 pm
by DavidRS4
JH Motorsports aftermarket hoses. They’re in America though
Good stuff. I have a clutch kit and brakes from them.
Re: Oil in coolant bottle
Posted: Mon Oct 15, 2018 5:56 pm
by Cupraderv
lol cheers
Re: Oil in coolant bottle
Posted: Mon Oct 15, 2018 5:57 pm
by Cupraderv
Are Radtec oil coolers any good