Mathew Posted April 19, 2021 Report Share Posted April 19, 2021 A hopefully quick questions. I have a stainless waterpipe hopefully on its way to me as my steel one was leaking. 1. Should i pre clamp the olive using a spare waterpump housing prior to fitting? 2. Should i use ptfe tape to aid sealing like you would on household plumbing? 3. If possible should i flair the two ends where the rubber hose goes or will they be alright? Thanks Mathew Link to comment Share on other sites More sharing options...
Nigel Clark Posted April 19, 2021 Report Share Posted April 19, 2021 My answers as follows: 1. Yes. It's easier to tighten the nut and compress the olive off the car, plus you can disassemble to check the olive is gripping the pipe properly. 2. Yes, but make sure strands of PTFE tape can't get out of the joint into the cooling system. 3. I've never tried flaring the pipe so can't comment from experience. But it sounds like a good idea. Nigel Link to comment Share on other sites More sharing options...
PeteH Posted April 19, 2021 Report Share Posted April 19, 2021 Whilst I have used PTFE in a variety of situations. I would never recomend it`s use on a "new" connection. The olive should seal the connection without any assistance.? I would also caution about flaring the pipe, the flare could remove slivers of the hose inner whilst being pressed on?. Pete Link to comment Share on other sites More sharing options...
Mathew Posted April 19, 2021 Author Report Share Posted April 19, 2021 56 minutes ago, PeteH said: Whilst I have used PTFE in a variety of situations. I would never recomend it`s use on a "new" connection. The olive should seal the connection without any assistance.? I would also caution about flaring the pipe, the flare could remove slivers of the hose inner whilst being pressed on?. Pete Was thinking more like a brake flare to aid the pipe staying on under pressure. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 19, 2021 Report Share Posted April 19, 2021 12 minutes ago, Mathew said: Was thinking more like a brake flare to aid the pipe staying on under pressure. Shouldn't need it; the hoses are a suitable length and not really under great pressure so it's unliklely they could be blown right back and completely off the pipe. Frost actually sell a flaring machine for cooling pipes that puts a flange round the pipe to help hoses stay on, but it's big money for home use. Link to comment Share on other sites More sharing options...
RogerH Posted April 19, 2021 Report Share Posted April 19, 2021 35 minutes ago, Mathew said: Was thinking more like a brake flare to aid the pipe staying on under pressure. A brake pipe type 'flare' would not work. Consider something on the lines of a plumbers 'Yorkshire' fitting. Swagged ring This is standard practice in industry and our car parts should have them without asking. If you are desperate for the swagged ring but do not want to buy the machine to do it, consider soldering a ring of copper wire in the appropriate place. However. the down pipe from my pump to the bottom of the radiator on my 4A has no flare and always has stayed put. Use the PTFE only if there is doubt over the joint. Roger Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 19, 2021 Report Share Posted April 19, 2021 never had a problem with any stainless bypass tubes letting hoses slide off but on truck production many years back someone in their wisdom deleted the barrelled ends and with a nice black paint that became slippery when hot the hoses all popped off under pressure , i was always of the idea the belled end sealed the hose clip keeps it on type of design agree no ptfe maybe a smear of grease to easy the nut torque compressing the olive stainless tube is a bu**ger to flare its too hard for most diy flare tooling i would rough up the tube surface a bit to give the hoses some grip fit and forget Pete Link to comment Share on other sites More sharing options...
Mathew Posted April 19, 2021 Author Report Share Posted April 19, 2021 Some good advice here as usual 👍 Link to comment Share on other sites More sharing options...
Mathew Posted April 19, 2021 Author Report Share Posted April 19, 2021 I think i will pre nip up the olive, saves it slipping off. I have new hoses and clamps so will leave alone, suspected it would be ok, just wanted to make sure. I will leave the ptfe off unless it leaks. Pete i will put a bit of lube on the threads as its an awkward nut to do up and assistance would help. Thanks everyone 😃 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 19, 2021 Report Share Posted April 19, 2021 make sure the adaptor into the pump is not cruded up Pete Link to comment Share on other sites More sharing options...
Mathew Posted April 19, 2021 Author Report Share Posted April 19, 2021 6 minutes ago, Pete Lewis said: make sure the adaptor into the pump is not cruded up Pete Good point. Link to comment Share on other sites More sharing options...
ed.h Posted April 19, 2021 Report Share Posted April 19, 2021 Best way to ensure a hose stays on a tube is a "bead" on the tube. I addad this bead to my new intake manifold coolant pipe using a modified pair of "lineman" pliers. Ed 1 Link to comment Share on other sites More sharing options...
PeteH Posted April 20, 2021 Report Share Posted April 20, 2021 You would get the same "effect" by putting a Pipe Fitting "olive" on the end of the pipe, getting the fitting off after might be problematic, and sacrificial, and require the use of a small hacksaw to remove?. Pete Link to comment Share on other sites More sharing options...
Mathew Posted April 20, 2021 Author Report Share Posted April 20, 2021 I supose an olive soldered on would work. Im not going to bother unless i have a problem. Link to comment Share on other sites More sharing options...
Mathew Posted April 20, 2021 Author Report Share Posted April 20, 2021 Pipe will be with me tomorrow, only i will be in devon so it will have to wait till Thursday. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 20, 2021 Report Share Posted April 20, 2021 13 hours ago, ed.h said: I added this bead to my new intake manifold coolant pipe using a modified pair of "lineman" pliers. Ed That poor guy's still down in Wichita wondering where his pliers went... Link to comment Share on other sites More sharing options...
Badwolf Posted April 20, 2021 Report Share Posted April 20, 2021 I am also thinking of replacing this pipe but am worried about shearing of the old connector which I suspect is rusted in. What is the best way of treating the joint before gently swinging on it? No gorilla tactics, I can almost feel the joint fracturing as I try to unfasten it. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 20, 2021 Report Share Posted April 20, 2021 Plenty of heat, or a long soak in proper penetrating oil; alternate as often as possible without going bang... and light tapping on the side of the housing with a small metal hammer can also break the seal. The longer you treat it, and the longer you give it to soak or cool down, the better it is. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 20, 2021 Report Share Posted April 20, 2021 its very common the banjo bolt shears , having said that i replaced the hose adaptor and the banjo bolt loosened and unscrewed with the fingers think im just lucky Pete 1 Link to comment Share on other sites More sharing options...
Badwolf Posted April 20, 2021 Report Share Posted April 20, 2021 45 minutes ago, Colin Lindsay said: Plenty of heat, or a long soak in proper penetrating oil; alternate as often as possible without going bang... and light tapping on the side of the housing with a small metal hammer can also break the seal. The longer you treat it, and the longer you give it to soak or cool down, the better it is. What is the best penetrating oil these days. I remember plusgas but that was in the dark ages. I may even have some in the shed somewhere Link to comment Share on other sites More sharing options...
Roger K Posted April 20, 2021 Report Share Posted April 20, 2021 Still PlusGas here... Link to comment Share on other sites More sharing options...
Badwolf Posted April 20, 2021 Report Share Posted April 20, 2021 Wow, I thought that it would have been outlawed by now. So many good things have (pauses for nostalgia break)..… Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 20, 2021 Report Share Posted April 20, 2021 I've started using Innotec Deblock (I think it was John D who recommended it) and have found it good stuff for seriously rusty bits. Link to comment Share on other sites More sharing options...
JohnD Posted April 20, 2021 Report Share Posted April 20, 2021 Thanks for the namecheck, Colin, yes, DEblock impresses me. On the beading of tubes, I got one of these: It might not work on so small a tube, but otherwise is excellent, and No, it didn't cost as much as that! Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 20, 2021 Report Share Posted April 20, 2021 1 hour ago, JohnD said: Thanks for the namecheck, Colin, yes, DEblock impresses me. It certainly impressed me on seriously rusty Herald parts; thanks for the heads-up. Link to comment Share on other sites More sharing options...
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