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Oil tank
Posted: Fri Mar 17, 2006 7:53 pm
by saxon
What are people's views on replacing an oil tank for a 1970 911 t with a second hand one, or using some kind of sealant to stop a leak, which Porsche don't recommend so i have been told.
What sort of money are secound hand tanks going for.
Posted: Fri Mar 17, 2006 8:11 pm
by 1972_911t
Where is the tank leaking from can it not be welded?
Steve
Posted: Fri Mar 17, 2006 8:16 pm
by saxon
It's leaking from the bottom of the tank were you have some type of allen bolt or what looks like one, to me
.
Posted: Fri Mar 17, 2006 8:28 pm
by Alan @ CanfordClassics
That Allen bolt is what you remove when you want to drain the oil. If it is leaking around it, it may just need a new washer between the drain plug and the tank. These should be replaced every time the oil is changed, if they used the old one it may be the oil is just leaking past it. If it is not this thee tank can be soldered to fix minor holes, I take mine to a guy that repairs car and house radiators.
HTH
Alan
Posted: Fri Mar 17, 2006 8:29 pm
by 1972_911t
id strip the tank off and find properly where its coming from may just be a poorly sealed fitting, also good opertunity to get the tank painted up. unless its really bad I would have thought welding would be best and probably cheepest option if there is any sort of hole. Get it off then you know what your up against could be as simple as a leaky cork gasket where the oil level sender is, running down the back side of the tank there only a few £ new.
Steve
Posted: Fri Mar 17, 2006 8:38 pm
by saxon
Thanks your help guy's.
Posted: Fri Mar 17, 2006 9:18 pm
by davidppp
Hello all.
The big problem with the 911 tank is that the oil passes striaght into the bearings unfiltered.
So any scale on the inside from welding gets into those bearings..
Even soldering can cause some scale, depending on how it is done..a veeery big hot iron can do the job without trouble..but there may well be some internal corrosion al;ready..just waiting to loosen and fly off..
Bottom line, if it needs repairs, may be better to find a new tank, check it with a borescope..
The old one can be sold to a racer who will be prepared to cut it open and modify it to eleimainate surge. then pickle it, then properly ultrasonic clean it..
A lot of work..
Kind regards
David
Posted: Sat Mar 18, 2006 12:07 pm
by fourteener
As above I would have thought welding would be dodgy especially if it were mig'd. Braising/soldering would be the way to go.
Alan is your radiator shop able to clean tanks. What's the recommendation for cleaning...boiling?
Posted: Sat Mar 18, 2006 1:23 pm
by Alan @ CanfordClassics
The chap I use does not clean them. For that I have another friend whom has a hot tank and also a ultrasonic cleaning tank.
Alan