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[raywilb]

are the non-return valve on the pipe that goes to the vacuum pump a separate item or do I have to purchase a complete pipe. or will something like a Lockheed non return valve do the job.? the inlet nipple has snapped off on mine.

[Entwood]

If its one of the small valves in these pictures, they seem to be available separately, but I'm not certain which one you are referring too...

,

HTH

[raywilb]

If its one of the small valves in these pictures, they seem to be available separately, but I'm not certain which one you are referring too...

,

HTH

  I think its the valve with No 12 besides it

[Nick W]

Something like THIS ?

[Marks DTM Calib]

Has one of the main large connections snapped off or the small side branch?

If the latter then you can fix them very successfully by measuring the OD of the snapped off part and drilling out the main valve body to that diameter, a dab of good glue and tap it in place. Ends up about 4-5mm shorter but works fine

[raywilb]

Has one of the main large connections snapped off or the small side branch?

If the latter then you can fix them very successfully by measuring the OD of the snapped off part and drilling out the main valve body to that diameter, a dab of good glue and tap it in place. Ends up about 4-5mm shorter but works fine

  its the non-return valve that has snapped at its inlet nipple. so from vac pump its ok up to the valve, then from non-return valve to servo that part of will no longer fit to valve. 

[Marks DTM Calib]

So you can get replacements, the official fix includes a fabric covered metal reinforced vac hose to.

What you can do is warm the nylon solid hose you have and insert the replacement

[raywilb]

So you can get replacements, the official fix includes a fabric covered metal reinforced vac hose to.

What you can do is warm the nylon solid hose you have and insert the replacement

having just spent 10mins with a leccy paint stripper trying to make the hose supple with no success, I was wondering if I got a non return valve that will fit the bore would it be ok. ?

[Doctor Gollum]

Try boiling water... Soaking it for five mins in a pan should suffice

[raywilb]

Try boiling water... Soaking it for five mins in a pan should suffice

  tried that to remove broken valve , I still had no success 

[Nick W]

Try boiling water... Soaking it for five mins in a pan should suffice

  tried that to remove broken valve , I still had no success

I've not found boiling water to heat nylon tube enough, plus the tube becomes too slippery to hold securely.


A few seconds with a heat gun makes assembling vacuum pipe simple, but you do still need a lot of force. The pipe's appearance doesn't change, it just becomes softer. Holding the fitting vertically in the vice works for me. This is how I've made custom fuel injection pipes, and I've never had one fail.

[raywilb]

Try boiling water... Soaking it for five mins in a pan should suffice

  tried that to remove broken valve , I still had no success

I've not found boiling water to heat nylon tube enough, plus the tube becomes too slippery to hold securely.


A few seconds with a heat gun makes assembling vacuum pipe simple, but you do still need a lot of force. The pipe's appearance doesn't change, it just becomes softer. Holding the fitting vertically in the vice works for me. This is how I've made custom fuel injection pipes, and I've never had one fail.

   I tried to remove that valve by holding the pipe in a flaring tool clamp in a vice trying to soften with heat gun in one hand & trying to screw it off with mole grips.. never budge it 1mm. in the end I sawed off the valve, so see what happens when I get new valve.  I have put feelers out for the complete pipe so see what that brings.

[Nick W]

Try boiling water... Soaking it for five mins in a pan should suffice

  tried that to remove broken valve , I still had no success

I've not found boiling water to heat nylon tube enough, plus the tube becomes too slippery to hold securely.


A few seconds with a heat gun makes assembling vacuum pipe simple, but you do still need a lot of force. The pipe's appearance doesn't change, it just becomes softer. Holding the fitting vertically in the vice works for me. This is how I've made custom fuel injection pipes, and I've never had one fail.

   I tried to remove that valve by holding the pipe in a flaring tool clamp in a vice trying to soften with heat gun in one hand & trying to screw it off with mole grips.. never budge it 1mm. in the end I sawed off the valve, so see what happens when I get new valve.  I have put feelers out for the complete pipe so see what that brings.

The valve is barbed, and the pipe a shrink fit over it. Assembling needs confidence, a rigid hold on the valve and heat on the pipe. Get that lot right, and it won't come apart without cutting something. A quick slice along the pipe with a Stanley knife removes the valve in less time than it takes you to read this sentence. This makes quick, cheap easy and safe fuel injection pipes, so is easily good enough for vacuum.


I would buy some hose(£10 a metre if bought from an expensive source), a new valve(about £8), and assemble on the car. The valves are universal, so you could get one off anything if a new one isn't acceptable. It's a cup of coffee job. That's how long the custom Avenger one took me when I added a brake servo to an engine swapped car.