Have moved on to the cooling system of the Javelin while the dizzy is at the doctors. and was wondering if all pumps and parts are interchangeable. Have found the thermostat is missing due to the corrosion in the housing. I did get a spare second hand housing with the car with an impeller but no front bearing and seals
I was wondering if i can make one good pump out of the two. Am checking with JCS to see what spares ect are available.
Thanks Barry.
Water pumps
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Barry20383
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Keith Clements
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Re: Water pumps
Email JCS . There are a few options.
Ther may still be redesigned and new ones available via Drummond Black, but apart from that most rebuild spares should be available. Please check out on here how to do it. There are a few topics and presentaions.
Ther may still be redesigned and new ones available via Drummond Black, but apart from that most rebuild spares should be available. Please check out on here how to do it. There are a few topics and presentaions.
skype = keithaclements ;
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Barry20383
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Re: Water pumps
Have contacted JCS to see what spares are available will try to contact Drummond Black will try to find his e mail.
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David Morris
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Re: Water pumps
Hi Barry,
In answer to your question, it's yes and no. Basically, complete Javelin water pumps are interchangeable. Jupiter ones are completely different. However, Javelin pumps were made in different variants. The fans were available in different styles, which resulted in different driving shafts. So, the internals of the pumps may well not be interchangeable.
Dismantling a pump is tricky and prone to damage. You are dealing with aluminium to aluminium joints and corrosion makes getting them apart quite difficult. I believe JCS have stocks of nice new parts and, as Keith says, I advise you to do some research on the forum before getting out your spanners. Some of the original impellers can rust and fitting these into a rebuilt pump will wreck new seals in no time.
I have heard that some of the replacement pump seals need some careful measurements when reassembling into a rebuilt pump to get the preload right and it's not just a question of just shoving a collection of new parts together and hoping for the best. I believe shimming is required, but do seek advice from the forum and others before getting into this area of Javelin design.
I think most would agree that this is not an area of design where Jowett's excelled, as it was basically a new experience for them. Previous cars had used thermo-syphon cooling and this was their first mass-produced design using water pumps. Jowett's even termed the Javelin water system as Pump-Assisted Thermo Siphon.
If you do rebuild a pump, don't expect it to be free of leaks when first fitted. The new seals need time to bed-in and can be expected to dribble when first used.
All the best and good luck,
David
In answer to your question, it's yes and no. Basically, complete Javelin water pumps are interchangeable. Jupiter ones are completely different. However, Javelin pumps were made in different variants. The fans were available in different styles, which resulted in different driving shafts. So, the internals of the pumps may well not be interchangeable.
Dismantling a pump is tricky and prone to damage. You are dealing with aluminium to aluminium joints and corrosion makes getting them apart quite difficult. I believe JCS have stocks of nice new parts and, as Keith says, I advise you to do some research on the forum before getting out your spanners. Some of the original impellers can rust and fitting these into a rebuilt pump will wreck new seals in no time.
I have heard that some of the replacement pump seals need some careful measurements when reassembling into a rebuilt pump to get the preload right and it's not just a question of just shoving a collection of new parts together and hoping for the best. I believe shimming is required, but do seek advice from the forum and others before getting into this area of Javelin design.
I think most would agree that this is not an area of design where Jowett's excelled, as it was basically a new experience for them. Previous cars had used thermo-syphon cooling and this was their first mass-produced design using water pumps. Jowett's even termed the Javelin water system as Pump-Assisted Thermo Siphon.
If you do rebuild a pump, don't expect it to be free of leaks when first fitted. The new seals need time to bed-in and can be expected to dribble when first used.
All the best and good luck,
David
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p.p.
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Re: Water pumps
iam VERY HAPPY with the new one from Drummond Black!!!!! works perfect in the summer and in the big and small hill's!!!!
peter
peter
owner of the jowett javelin Standard 1950 from new zealand,
there is no jowett club in switzerland. flying under "Rest of the World"
me name: peter pfister
there is no jowett club in switzerland. flying under "Rest of the World"
me name: peter pfister
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Barry20383
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Re: Water pumps
How can i contact Drummond Black cant seem to find his contact details will give him a try first.
Thanks Barry.
Thanks Barry.
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Keith Clements
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Re: Water pumps
How about looking in the JT members under Quick Links?
Or logging into Member Services and doing a search for members?
Contact details should not be published here as it is public.
Or logging into Member Services and doing a search for members?
Contact details should not be published here as it is public.
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Mike Allfrey
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Re: Water pumps
One modification I carry out is machining the front and rear of the impeller to accept ceramic rings for the carbon seal faces to rotate against. The ceramic rings are available from Avon Seals PTE. LTD. G-2 Industrial Estate, Ambattur, Chennai 600-058, India. My contact there was Mr A.N. Girasheen who was helpful in a long-winded way. The ceramic rings, Part Number V16278, come with rubber seals for the water pump shaft.
Avon Seals also make the original Payen type mechanical seal. Their Part Number is 16-B-36. These rings and seals have not wept a drop of coolant since they were installed. Thoroughly recommended.
Mike A.
Avon Seals also make the original Payen type mechanical seal. Their Part Number is 16-B-36. These rings and seals have not wept a drop of coolant since they were installed. Thoroughly recommended.
Mike A.
E0 SA 42R; Rover 75
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Barry20383
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Re: Water pumps
Have 2 water pumps both cases have the same casting number. The pumps have a different shaft thread for the fan would it be possible to change the pump and fan shaft and fit it in a different case as long as i fit the right fan. This is what would happen if i bought a new fan casting from JCS.
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Keith Clements
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Re: Water pumps
What are you trying to do?
Please read the water pump rebuild topics to understand what is involved. Rebuilding a water pump is not easy.
Please read the water pump rebuild topics to understand what is involved. Rebuilding a water pump is not easy.
skype = keithaclements ;
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David Morris
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Re: Water pumps
Hi Barry,
Keith is right. Assembling a water pump sounds easy, but it isn't. There is some quite tricky and skilled fitting to do, to get a pump that is water tight and long lasting. The pump castings will carry the same casting number, but that really doesn't mean much, as the internals have to be assessed for tolerances and the pump running faces by the impeller might need turning on a lathe, unless everything is new. Even then the seals also need to be carefully assessed for the correct amount of pre-load, by shimming.
It really is best to contact those who have done this several times, like Drummond Black and John Airey, and get their advice. If either one of these great colleagues can offer you a rebuilt pump, them my advice is to go for that option. It will save you a massive amount of problems.
Take care and stay safe,
David
Keith is right. Assembling a water pump sounds easy, but it isn't. There is some quite tricky and skilled fitting to do, to get a pump that is water tight and long lasting. The pump castings will carry the same casting number, but that really doesn't mean much, as the internals have to be assessed for tolerances and the pump running faces by the impeller might need turning on a lathe, unless everything is new. Even then the seals also need to be carefully assessed for the correct amount of pre-load, by shimming.
It really is best to contact those who have done this several times, like Drummond Black and John Airey, and get their advice. If either one of these great colleagues can offer you a rebuilt pump, them my advice is to go for that option. It will save you a massive amount of problems.
Take care and stay safe,
David