Homer Posted December 3, 2006 Share Posted December 3, 2006 My oil drain is leaking like a sieve where it joins to the block. It’s a BL oil kit with an aluminium flange and 45 deg fitting, but when warm the oil appears to be leaking out where the flange meets the block. How do you guys avoid a leak here? I used one of the plastic gaskets which cam with the XS kit, but obviously this didn't work. Is the Toyota one the best to use and should I use any sealant - if so which type? Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2006 Share Posted December 3, 2006 The Stock Toyota Steel gasket is the better one. And if you want to be super safe, very lightly coat it in RTV ( not required TBH). The plastic gaskets are just nasty IMHO. Also run a steel ruler along the face of the Flange see if it's all true. Quote Link to comment Share on other sites More sharing options...
TLicense Posted December 3, 2006 Share Posted December 3, 2006 Definitely use the stock gasket, good call Mig on making sure the surface is flat. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted December 3, 2006 Share Posted December 3, 2006 Again - perfect Advise Mig. Quote Link to comment Share on other sites More sharing options...
Homer Posted December 3, 2006 Author Share Posted December 3, 2006 Thanks guys, just checked the old stock gasket and its not going to be reusable. Off to Toyota tomorrow morning! Will also check the flange, thanks Mig. Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2006 Share Posted December 3, 2006 Also if you get time double check the earl's/aeroquip fitting to see if it has been assembled all good and not been pinched too much. Quote Link to comment Share on other sites More sharing options...
Homer Posted December 3, 2006 Author Share Posted December 3, 2006 Also if you get time double check the earl's/aeroquip fitting to see if it has been assembled all good and not been pinched too much. The fitting for the drain is has 'Sumit' stamped on it, but looks exactly like aeroquip. The flange is a rather flimsy looking aluminium one but also has a 45 deg alu male/male adaptor to clear the steering rack bolt. Though its done up tight, I was very concerned about stripping the thread on the alu flange when fitting the 45 deg adaptor. Obviously there's only one position the 45 deg fitting can be in, so its always plus or minus a full rotation when tightening. I'm not sure it could take another turn without snapping the flange or stripping thread. It is leaking too, but only a tiny amount compared to the block fitting. Here's a pic of the fitting: Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2006 Share Posted December 3, 2006 Agreed it can be a worry on the flange and 45 deg fitting but they are not as weak as we think they are , just don't go mad on it. TBH although it's a tapered thread on the 45 to flange they are prone to weeping, I would put a bit of PTFE or sealing compound on there before you wind it in as it does help to prevent this weeping. You wont need any sealing aiders on the actual flared Earl's types unions as they seal on their respective faces. The join I was referring to in my post above ( sorry for the confusion) is the actual braided hose to fitting union. These sometimes can be put together in a rush and either not fully pushed home before assembly or over pinched, rare but not to be ruled out. Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 3, 2006 Share Posted December 3, 2006 it all looks standard stuff mate, reassemble using a good sealer such as Hylomar and thread sealer (not ptfe ffs) on the aeroquip, make sure everything is clean and degreased with something like cellolose thinners Quote Link to comment Share on other sites More sharing options...
SimonB Posted December 3, 2006 Share Posted December 3, 2006 Looks like you didn't use PTFE tape on the NPT thread there. You need PTFE tape on NPT fittings as they seal by the thread deforming when you tighten it and without you can get oil working its way round the thread and out. Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 3, 2006 Share Posted December 3, 2006 Looks like you didn't use PTFE tape on the NPT thread there. You need PTFE tape on NPT fittings as they seal by the thread deforming when you tighten it and without you can get oil working its way round the thread and out. nooooooooooo PTFE is for plumbers you need a proper hydraulic thread sealer, PTFE tape when exposed to oil turns to mush, trust me i worked with hydraulics for 18 years Quote Link to comment Share on other sites More sharing options...
Homer Posted December 3, 2006 Author Share Posted December 3, 2006 I had already used a good amount of ptfe when fitting the 45 deg adaptor but didn't use any compound (Presuambly Univeral blue is okay?). I thought ptfe was okay on npt fittings? I refitted both ends of the clamps onto the braided hose as it was too long (xs power manifold strikes again), they're both done up very tight and are not leaking. Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 3, 2006 Share Posted December 3, 2006 I had already used a good amount of ptfe when fitting the 45 deg adaptor but didn't use any compound (Presuambly Univeral blue is okay?). I thought ptfe was okay on npt fittings? I refitted both ends of the clamps onto the braided hose as it was too long (xs power manifold strikes again), they're both done up very tight and are not leaking. no forget PTFE tape it has no place on oil systems period it is for sealing water go to a hydraulics specialist and get a proper thread sealer Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2006 Share Posted December 3, 2006 The norm PTFE tape IE plumbers stuff TBH is shite and will turn to mush as Paul mac has pointed out. You can get Oil resistant "PTFE" tape for a couple of quid which is much much better. Thread sealer is also your friend too Quote Link to comment Share on other sites More sharing options...
SimonB Posted December 3, 2006 Share Posted December 3, 2006 Oh ok, cool. Think Auto who make all the fittings say PTFE tape can be used, so that's good enough for me! I've disassembled a few that I sealed with PTFE and it was fine after a year of use, maybe it's something specific to hydraulic oil? Quote Link to comment Share on other sites More sharing options...
Homer Posted December 3, 2006 Author Share Posted December 3, 2006 Okidoki, looks like its clear where I went wrong Where would I get a suitable sealer? I'm been to all the local motor factors and they only have Hylomar universal blue, is that alone suffcient or should I use some sort of thread lock too? Quote Link to comment Share on other sites More sharing options...
Homer Posted December 3, 2006 Author Share Posted December 3, 2006 Think Auto who make all the fittings say PTFE tape can be used, so that's good enough for me! That was what they told me too, which is why I used it Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 3, 2006 Share Posted December 3, 2006 I've used PTFE on some oil fittings and some fuel ones, and they have stayed sealed... -Ian Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2006 Share Posted December 3, 2006 Or the tape you used might have been oil resistant anyway? I have used "normal" before and if fitted clean and dry seems to work OK but as soon as it comes into contact with oil is disappears like the Fizzy UFO sweets we used to get as a kid. Test a bit in some oil and see. All depends on make and its resistance. Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 3, 2006 Share Posted December 3, 2006 Oh ok, cool. Think Auto who make all the fittings say PTFE tape can be used, so that's good enough for me! I've disassembled a few that I sealed with PTFE and it was fine after a year of use, maybe it's something specific to hydraulic oil? Simon an oil system is an oil system whatever-the only difference is on a hydraulic system the pressures are higher, as an apprentice i was nearly beaten to a pulp for using PTFE, as well as not being capable to stand up to oil it can "wind" off the thread on installation and end up anywhere in the system causing blockages believe me leave it for the plumbing thats what its good at Quote Link to comment Share on other sites More sharing options...
Homer Posted December 4, 2006 Author Share Posted December 4, 2006 Thanks for the reponses guys, much appreciated Before I go ahead an mess this up a 2nd time, could anyone answer the following? Where would I get a suitable sealer? I'm been to all the local motor factors and they only have Hylomar universal blue, is that alone suffcient or should I use some sort of thread lock too? Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 4, 2006 Share Posted December 4, 2006 Thanks for the reponses guys, much appreciated Before I go ahead an mess this up a 2nd time, could anyone answer the following? Hylomar for the flange, Loctite 577 thread sealant for the thread, a local hydraulic factor should be able to sell you this or an equivalent, check the yellow pages Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 4, 2006 Share Posted December 4, 2006 And if your are getting a brand new Toyota seal for the flange you don't need hylomar Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 4, 2006 Share Posted December 4, 2006 Or the tape you used might have been oil resistant anyway? Good point, I nicked off a mate who was working on Rover V8's - if anything needs to be oil resistant... -Ian Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 4, 2006 Share Posted December 4, 2006 as well as not being capable to stand up to oil it can "wind" off the thread on installation and end up anywhere in the system causing blockages Good point, this, although I still commit the sin of using PTFE, I make sure I'm about two thread turns away from the end of the fitting when I start, and wrap in the direction of fitment so that fitting it actually tightens the tape and there is no chance of getting a strag end into the system when installing it. -Ian Quote Link to comment Share on other sites More sharing options...
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