Is it a 6 vane pump in the engine? I am convinced the shinny looking housing is a 12 vane housing, which suggests with that amount of gaskets either the pump is not seating properly in the block if its a 12 vane or if 6 vane due to a mismatch in shape for the impeller VS housing face shape. Either way I am convinced there will be a witness marks from either impeller blades or the nut after rotation probably to give you a clue :)
Hi Henry, I noticed the old engine had a 6 vane impellor. Even though it looked to sit further down, I don't know what the actual difference if any, between the 6 & 12 vane impellors! As they both sit in a same spec of block? I would say that your 12 vane impellor is still not sitting snug in the block. It's a shame you couldn't get them both out as you would have been able to verify the overall length of each pump assembly. The spacing or height of the pump housing being as it s now, when running, my concern would be that the flow & return to the impellor may actually penetrate beneath the impellor from the water orifices in the block. This is a bloody nightmare for you, are you happy that the impellor LH bolt is not hitting or coming into contact with the housing, I know the engine turns etc but that force of turning you never feel if it was. What I did as an initial test to ensure my clearance and that the impellor was clear, was to dab a thin layer of tippex on the LH bolt, put the housing on with my gaskets and tighten down. I then removed the housing to ensure no tippex was present on the housing. All was good. Good luck with it Henry, you ned to get both water pumps out & compare at least, hell I might just post you my pump assembly to borrow for comparison!!!! but at least you have the luxury of another engine for comparison.
I agree, you need to get both pumps out and compare them. Maybe fabricating a bridge type puller would give better results than the slide hammer in this instance. You need the cooling system to be right if you want a reliable engine so take the extra time and work out what is going on. The pump being as tight as it is won't allow you to get an accurate measurement. Oh the joys of Brummie engineering.
I don't think the pump housing you have are the same! I think your spare TR7 engine is a 6 vane pump housing, whereby the new housing in your hand is a 12 vane pump housing. You cannot interchange, you need to use the correct housing for the pump you are using. I could be wrong but if you pause at 4:01 the shape of the concave piece is different, the ramp looks more extreme on the spare engine, because it uses the 6 vane pump. This Rimmer Bros video goes into it nicely th-cam.com/video/VklGz6-U0Xw/w-d-xo.html obviously for a Stag but the pump is same I believe. This video also tells you how to set it up in relation to gaskets etc.. And reading the comment below I will do the tippex trick on mine when setting checking it :) - - - - (edit) On reflection the Stag pump housing does look different, I am sure the principle is the same, but I would do other research etc. and wait for others comments etc.
Hi Adrian, I'll get them both out and look again, and see if I can get a measurement of the angles. I see what you mean in the video and I had a slight doubt when they were out. But, the video makes it look a lot more than real life which I suspect is the angle. I had seen the RimmerBros video which was why I went down the route of looking at the two. And so I've just looked at the website and it shows 2 different housing numbers ! 6 vane is 217993, 12 vane is 218542. Now I need to tie those back to what I have. And I seem to remember the first number being on the 6 vane car. The image is also very different from either of my pumps
Looking at the image again, I think that is a Stag 12 vane housing being shown on RimmerBros. Scanning other images they show a 12 vane housing which looks like mine
@@HenrysGarage No worries, food for thought really! I am definitely no expert, mines still in bits!! Its strange the spare engine pump housing looks the same as the shinny one as the spare engine has a 6 vane pump? Your housings are definitely TR7 as the outlet(?) sits where the other bank of cylinders would be in a V8 configuration on the Stag I believe. I still think the principles from the Rimmer Bros video should be correct on the TR7 application in terms of gaskets and the face slope of 6 vane VS 12 vane etc. Have you got an email, I can send you a picture of my 12 vane pump without the cover on, before I took it out so you can see what it should look like in the correct depth in the block. I can also send you a photo of my 12 vane pump housing.
@@adrianhughes2163 I don't know if strange or not but if we think about if logically, we would want the curvature of the housing to match the curvature of the pump and 6 and 12 vane pumps have a difference curvature so we would expect the housing to as well. So I'm going to pull them both off and take another look
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Is it a 6 vane pump in the engine? I am convinced the shinny looking housing is a 12 vane housing, which suggests with that amount of gaskets either the pump is not seating properly in the block if its a 12 vane or if 6 vane due to a mismatch in shape for the impeller VS housing face shape. Either way I am convinced there will be a witness marks from either impeller blades or the nut after rotation probably to give you a clue :)
Hi Andy, the engine I am rebuilding has a 12 vane pump. I think adding tippex is a next step
Hi Henry, I noticed the old engine had a 6 vane impellor. Even though it looked to sit further down, I don't know what the actual difference if any, between the 6 & 12 vane impellors! As they both sit in a same spec of block? I would say that your 12 vane impellor is still not sitting snug in the block. It's a shame you couldn't get them both out as you would have been able to verify the overall length of each pump assembly. The spacing or height of the pump housing being as it s now, when running, my concern would be that the flow & return to the impellor may actually penetrate beneath the impellor from the water orifices in the block. This is a bloody nightmare for you, are you happy that the impellor LH bolt is not hitting or coming into contact with the housing, I know the engine turns etc but that force of turning you never feel if it was. What I did as an initial test to ensure my clearance and that the impellor was clear, was to dab a thin layer of tippex on the LH bolt, put the housing on with my gaskets and tighten down. I then removed the housing to ensure no tippex was present on the housing. All was good.
Good luck with it Henry, you ned to get both water pumps out & compare at least, hell I might just post you my pump assembly to borrow for comparison!!!! but at least you have the luxury of another engine for comparison.
I agree, you need to get both pumps out and compare them. Maybe fabricating a bridge type puller would give better results than the slide hammer in this instance. You need the cooling system to be right if you want a reliable engine so take the extra time and work out what is going on. The pump being as tight as it is won't allow you to get an accurate measurement. Oh the joys of Brummie engineering.
Hi Chris, Arrrrrrgggggggggggggggg!
Hi Andy, Yes, Bridge puller to be made today
@@HenrysGarage LOL I've used that expression too when working on my 7!! :)
Did you trial fit the housing from your spare engine?
Hi Chris, I didn't torque it down. It did seem to sit a little better, but nothing like as well as it sat on you ex.
I don't think the pump housing you have are the same! I think your spare TR7 engine is a 6 vane pump housing, whereby the new housing in your hand is a 12 vane pump housing. You cannot interchange, you need to use the correct housing for the pump you are using. I could be wrong but if you pause at 4:01 the shape of the concave piece is different, the ramp looks more extreme on the spare engine, because it uses the 6 vane pump. This Rimmer Bros video goes into it nicely th-cam.com/video/VklGz6-U0Xw/w-d-xo.html obviously for a Stag but the pump is same I believe. This video also tells you how to set it up in relation to gaskets etc.. And reading the comment below I will do the tippex trick on mine when setting checking it :) - - - - (edit) On reflection the Stag pump housing does look different, I am sure the principle is the same, but I would do other research etc. and wait for others comments etc.
Hi Adrian, I'll get them both out and look again, and see if I can get a measurement of the angles. I see what you mean in the video and I had a slight doubt when they were out. But, the video makes it look a lot more than real life which I suspect is the angle. I had seen the RimmerBros video which was why I went down the route of looking at the two. And so I've just looked at the website and it shows 2 different housing numbers ! 6 vane is 217993, 12 vane is 218542. Now I need to tie those back to what I have. And I seem to remember the first number being on the 6 vane car. The image is also very different from either of my pumps
Looking at the image again, I think that is a Stag 12 vane housing being shown on RimmerBros. Scanning other images they show a 12 vane housing which looks like mine
@@HenrysGarage No worries, food for thought really! I am definitely no expert, mines still in bits!! Its strange the spare engine pump housing looks the same as the shinny one as the spare engine has a 6 vane pump? Your housings are definitely TR7 as the outlet(?) sits where the other bank of cylinders would be in a V8 configuration on the Stag I believe. I still think the principles from the Rimmer Bros video should be correct on the TR7 application in terms of gaskets and the face slope of 6 vane VS 12 vane etc. Have you got an email, I can send you a picture of my 12 vane pump without the cover on, before I took it out so you can see what it should look like in the correct depth in the block. I can also send you a photo of my 12 vane pump housing.
@@adrianhughes2163 I don't know if strange or not but if we think about if logically, we would want the curvature of the housing to match the curvature of the pump and 6 and 12 vane pumps have a difference curvature so we would expect the housing to as well. So I'm going to pull them both off and take another look
@@HenrysGarage Totally agree :)