Oil cooler fitting thread destroy
Oil cooler fitting thread destroy
Hello, got an B7 RS4 few month back and here's my first issue. The oil cooler hose was leaking. Took everything off, but the oil cooler fitting didn't survive!! Anyone have an idea how to possibly fix this. I first thought about welding a new fitting, but realize that it's aluminum. Maybe I can weld some aluminum back on the destroyed fitting but not quite sure how to redo the thread?? Any help would be appreciated. Thanks
- RossDagley
- Top Gear
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- Joined: Mon Mar 17, 2014 11:53 pm
- Location: Bedford, UK
Re: Oil cooler fitting thread destroy
I've been lucky enough to not experience this, but I've read about it here.
Because the cooler is alloy and the threaded part of the pipe is steel, they corrode together like you describe - and the short of it is you often cannot remvoe the pipework without damaging the cooler.
If I understan you correctly, you may need a new cooler. Either OEM or I believe Forge make an aftermarket one.
Because the cooler is alloy and the threaded part of the pipe is steel, they corrode together like you describe - and the short of it is you often cannot remvoe the pipework without damaging the cooler.
If I understan you correctly, you may need a new cooler. Either OEM or I believe Forge make an aftermarket one.
Believe only the man who has nothing to gain from what he says.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
Re: Oil cooler fitting thread destroy
paspaul - FON! (Geeze Ross, you're slipping with the FON's)!
Oil cooler! It's the dreaded cooler of the RS4. Here you go - the best thread on this:
viewtopic.php?f=35&t=107747&hilit=marine
viewtopic.php?f=35&t=107306&hilit=audi+pardner
On the brink of doing mine with JHM and new Coler on sale or return incase I need it. I'm not overly keen on the Forge solution that moves the cooler in front of the Radiator...
paspaul - Photos of your RS4!
Oil cooler! It's the dreaded cooler of the RS4. Here you go - the best thread on this:
viewtopic.php?f=35&t=107747&hilit=marine
viewtopic.php?f=35&t=107306&hilit=audi+pardner
On the brink of doing mine with JHM and new Coler on sale or return incase I need it. I'm not overly keen on the Forge solution that moves the cooler in front of the Radiator...
paspaul - Photos of your RS4!
Gone but never forgotten:
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
- RossDagley
- Top Gear
- Posts: 2334
- Joined: Mon Mar 17, 2014 11:53 pm
- Location: Bedford, UK
Re: Oil cooler fitting thread destroy
haha sorry I am indeed slipping!neilparf wrote:paspaul - FON! (Geeze Ross, you're slipping with the FON's)!
Believe only the man who has nothing to gain from what he says.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
Re: Oil cooler fitting thread destroy
Had this on a 2002 s6 and a rs6 c5 someone at audi wants a chemistry lesson 10 years on at least and still the same <beep>.
Re: Oil cooler fitting thread destroy
I've just had mine done before the oil started leaking. It turns out that water gets inside the threads of the pipes as well, so they can rust from the inside.
This doesn't help you much but MRC cut off the pipes about a foot from the end, removed the cooler and then cut the pipe across to save the cooler, just sacrificing the knackered pipes. Lesson for me was to do it when you first start seeing rust on the pipes and you can save the cooler
Aberdeen Audi have a few coolers for sale on eBay for £590 and someone posted the other week about a radiator specialist who makes a direct replacement for the B7 cooler. I'm not keen either on the forge solution as it places the rad infront of the main one.
This doesn't help you much but MRC cut off the pipes about a foot from the end, removed the cooler and then cut the pipe across to save the cooler, just sacrificing the knackered pipes. Lesson for me was to do it when you first start seeing rust on the pipes and you can save the cooler
Aberdeen Audi have a few coolers for sale on eBay for £590 and someone posted the other week about a radiator specialist who makes a direct replacement for the B7 cooler. I'm not keen either on the forge solution as it places the rad infront of the main one.
8L S3 with stage 2 (gone)
B7 A4 DTM (gone)
B7 RS4 (Miltek Res Valved, 100 cell cats, Ceramics, Carbon cleaned) gone
C7 RS6 Panther, carbon pack,
B7 A4 DTM (gone)
B7 RS4 (Miltek Res Valved, 100 cell cats, Ceramics, Carbon cleaned) gone
C7 RS6 Panther, carbon pack,
Re: Oil cooler fitting thread destroy
+1jonicox wrote:I'm not keen either on the forge solution as it places the rad infront of the main one.
Gone but never forgotten:
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
Re: Oil cooler fitting thread destroy
You'd think they would know their bimetallic corrosion values and their materials should be equal nobility by now. Agreed.davers6 wrote:Had this on a 2002 s6 and a rs6 c5 someone at audi wants a chemistry lesson 10 years on at least and still the same <beep>.
It's a nice steady parts revenue stream and building in part decay always helps
Gone but never forgotten:
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
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- 4th Gear
- Posts: 937
- Joined: Sun Nov 11, 2012 8:22 am
- Location: North Yorkshire
Re: Oil cooler fitting thread destroy
That's why I went down the JHM replacement pipes and new OEM cooler routeneilparf wrote:+1jonicox wrote:I'm not keen either on the forge solution as it places the rad infront of the main one.
Misano Red B7 RS4 Avant. 20" Rotors. KW adjustable spring kit. 8 & 10mm H&R spacers. MRC Stage 2 remap. Pre-cat delete & x-pipe.
Re: Oil cooler fitting thread destroy
It's in front of the main rad anyway isn't it? You have the oil cooler then behind it is the power steering rad, then the air con rad then the main rad I thought (could be wrong). I have the aux rad delete and the Forge cooler and noticed no problems over the summer.
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- 4th Gear
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- Joined: Sun Nov 11, 2012 8:22 am
- Location: North Yorkshire
Re: Oil cooler fitting thread destroy
I'm not saying the Forge cooler will cause problems Mike, I'm sure it won't, but I just didn't like the idea of it mounted above the crash bar and potentially interrupting air flow through the upper part of the main rad.MikeFish wrote:It's in front of the main rad anyway isn't it? You have the oil cooler then behind it is the power steering rad, then the air con rad then the main rad I thought (could be wrong). I have the aux rad delete and the Forge cooler and noticed no problems over the summer.
Misano Red B7 RS4 Avant. 20" Rotors. KW adjustable spring kit. 8 & 10mm H&R spacers. MRC Stage 2 remap. Pre-cat delete & x-pipe.
Re: Oil cooler fitting thread destroy
Thanks all for the reply. Forge kit and JHM seems good solution but time was against me since I want my car for the weekend. Ended up at speed Shop near me and bought -12an fitting that I welded at the place of the old destroyed one. Local hydraulic hose Shop redid the hose. They should be ready tomorrow. Still end up with the same problem of steel/aluminum fitting but will be good for now.
- RossDagley
- Top Gear
- Posts: 2334
- Joined: Mon Mar 17, 2014 11:53 pm
- Location: Bedford, UK
Re: Oil cooler fitting thread destroy
What sort of money did you pay for the hose if you don't mind saying?
I'm guessing something like Pirtek could make these up too as another potential avenue to explore.
£15 for a new cooler fitting, £20 for a local Shop to weld it on, locally supplied hoses, could be a large saving here.
I'm guessing something like Pirtek could make these up too as another potential avenue to explore.
£15 for a new cooler fitting, £20 for a local Shop to weld it on, locally supplied hoses, could be a large saving here.
Believe only the man who has nothing to gain from what he says.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
Re: Oil cooler fitting thread destroy
200$ hose and weld 35$ for the aluminum fitting. Canadian money so divide by almost by two for UK.RossDagley wrote:What sort of money did you pay for the hose if you don't mind saying?
I'm guessing something like Pirtek could make these up too as another potential avenue to explore.
£15 for a new cooler fitting, £20 for a local shop to weld it on, locally supplied hoses, could be a large saving here.
- RossDagley
- Top Gear
- Posts: 2334
- Joined: Mon Mar 17, 2014 11:53 pm
- Location: Bedford, UK
Re: Oil cooler fitting thread destroy
Cheap as chips!
Believe only the man who has nothing to gain from what he says.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
2017 BMW M4 Competition Pack - Mineral Grey - 530ps by bootmod3, JCWeldfab exhaust.
Previously:
Renault Megane R26 - Liquid Yellow - 275ps.
2015 Audi Exclusive RS4 B8 - Merlin Purple - JCWF Exhaust
2009 Audi RS6 C6 - Phantom Black - 730ps MRC Tuned
2008 Audi RS4 B7 - Phantom Black - 449ps MRC Tuned
2002 Peugeot 106 Gti - Mauritius blue - 430ps Home built.
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