stuck oil lines on oil cooler 308

try some heat on the nut, plus some penatrating oil. Heat the fitting, spray with the oil, then heat again (the oil will probably flame up for a few seconds). Try that a few times. On reassembly, I usually put some anti-sieze on the threads.

 

did you saturate the area with pb3 or similar release agent?
you know all too well how aluminum joints have an affinity for each other.
if that doesn't work by itself, try a hairdryer and reapplication of pb3.
sorry you're missing a nice driving summer.

 

I had one stuck pretty hard, I ended up removing the entire cooler so I could clamp it in a vice between some wood. In the end I ended up heating the nut with the torch using a small tip, and even then it was hard to crack and turned off hard all the way. If I didnt know better I thought someone used thread lock on it.

 

The same thing happened to me too and I ended up doing exactly as you did.

Must have been the same worker who put the coolers on our cars

 

Martin, please be careful when applying heat from a torch to the fittings. You do not want to put too much as you may de-braze the fitting off of the cooler!

Apply heat for a very short period, spray the area with a quick shot of penetrating oil (and also direct the oil spray to the exposed area of the fitting threads) and repeat if necessary. The heating/quenching cycles can be enough for any mechanical bond between the parts to break free (but not enough to change the physical properties of the metals in question, unless the steel hose fittings start changing colour and begin to glow... That's too hot!).

 

Peter makes a good point. I wrapped a soaking wet rag around the end of the cooler under the nut. But in any case you most certainly want to keep heat to a minimum and as localised as possible.

I cant for the life of me understand how anyone could be so dumb as to put thread lock on a hydraulic line fitting, but the level of hack repair work being seen on these cars shows no level of incompitance that cant be reached when taking these cars to be repaired. As bad as it is, and as much as I am appaled each time the bar is lowered a little further, I have now become of the mind we still have not seen the worst. We should start a thread on hack jobs, lol.

 

Martin. I dont know if you seen what I have written, but all the lines I own (three sets) and all the ones ive seen, have re-useable ends. The barrel end unscrews out of the end fitting, and the hose comes out of the barrel. Unless you have a need to spend $$$$ you might look into this.

 

I dont know what yours look like, but the 3 pairs I have which make up 12 ends in total, all look like pressed or crimped hydraulic fittings. There are no spanner flats or anything "nut like" about them to see they come apart, and the end where the hose goes in looks like a smooth barrel. But all the ends threaded out of the barrel with fine thread, and all except a couple were loose. If they put these type of fittings on a US wet sump car, I cant imagine why the euro dry sumps dont use them. If your ends look simular, you probably would have to turn the ends 3 or 4 turns or more to see them screwing out.

 

Hi Martin

I have a drysump also, I use the old fittings and pressed new hoses to them.
But with one connection to the oil cooler I had to use a Dremmel to cut the nut, so I welded that one.

It was about 80 euro for new hoses.

Good luck
/Patrik

 

Order a new cooler. You'll find the threads on the cooler will strip out during the removal of the lines. I have had to do this 3 times this year so far on various customers Ferrari's. I'm thinking about keeping oil coolers as an in stock item.

 

look for any place that rebuilds aircraft oil coolers for recip aircraft. save the old coolers and have them restored, and sell them.

 

Normal situation. The factory installed the lines so tight on the coolers it just was not possible to remove them without destroying either the fitting or the cooler. Back in the old days when the parts were cheap we just decided which part we really wanted to keep and cut the other off. We tried everthing, there was just no way to get the line off without terminal damage to the cooler. These days the hoses are so expensive I would sacrifice the cooler.

 

WTF? I guess I should consider myself lucky I got both of mine off then. Any idea why they put them on so damned tight? I see white residue on the threads that looks like some type of bonding agent like thread lock. Its white in color, but I have seen old red loctite turn white when its unthreaded but I dont what this stuff is/was.

Welcome back by the way, your perspective has been sorely missed, even when directed at me

On another note, did you have luck reusing the old fittings, or was it a PITA? Or didnt you bother?

 

Yours may not have been original but the coolers did come with some white coating on the fittings. I do not believe it was a thread locker or sealer but maybe an anti corrosion coating.

When possible we reused fittings because they just were not available in this country then. As you know all aviation required AN and aircraft shops were the only ones making hoses and stocking fittings.

The hoses have gotten so stupid expensive I have on a few occasions used comercially available coolers and AN fittings but have been very dissatisfied by availability of suitable fittings and coolers with the desired flow capacity/size.

 

I noticed a white, powdery substance left on the threads of the cooler, but back then, I thought it was corrosion...

You don't have to tell me about these fittings. When the original lower hose started to leak, I decided to replace both and used a hydraulic hose builder that worked with a company we dealt with where I work.

The female, nut fittings were a DIN type ("Light Series" if memory serves me correct) and were not that hard to get, but the banjo fittings... 8 weeks!

It worked great for three years but then these new hoses started to leak, so I took them off and when I cut the ferrules off and pulled the hose off, I found the nipples were squished to half their diameter... Friggin' hose builder over-crimped the ferrules!

I was so pissed off at that point and then on top of that, the oil cooler leaked for a second time, I decided to ditch the entire system, installed a B&M cooler, custom-made my own duct and went with field-rebuildable AN hose fittings so I could make my own hoses! No problems or leaks since!

 

Hi, Martin

In case you dont find a solution,...
Some months ago I did changed my oillines on the Mondial. I hat new ones maked by :
Thyco in Lanklaar/Dilsen in Belguim. There phone +32 89 798482. Its near the German border about 10 km nord to Maastricht.
They are mecanics who are repairing mostly machines and hydrolics. Ask for the "magazijnier" with the Ferrari. He ownes a Mondial T....the price whas about 30 euro for 2 lines, with new fittings.

Enzo52

 

THAT should last you a good, long time!

Congrats on getting it all back together!

A happy ending to the story.