AJP oil pump overhaul
Discussion
I think Grantura Engineering can refurb for you but it gets pricey. If you look on the alternative parts listing the parts arent too expensive. Per an old post from fatjon:
You need a decent puller and apply heat on the water impellers. They are smeared with loctite during assembly and are hard to pull off when cold which risks breaking them. once heated up they come off dead easy. In the engine build manual they are hand assembled without any special tools and I did mine that way in less than 2 hours. The bearings and seals are off the shelf items and cost peanuts.
You need a decent puller and apply heat on the water impellers. They are smeared with loctite during assembly and are hard to pull off when cold which risks breaking them. once heated up they come off dead easy. In the engine build manual they are hand assembled without any special tools and I did mine that way in less than 2 hours. The bearings and seals are off the shelf items and cost peanuts.
Again a cut n paste:
A lot has been said about the difficulty of rebuilding the AJP water/oil pump assembly. I took mine apart for a small water leak and discovered that it's not that hard to rebuild. The oil pump rotors are available from TVR Power Stores off the shelf. Same part as in the S6 engine too I believe.
The ceramic water seals on the pump are part number IHF14.30.14 from City Seals and Bearings on 01142 435 343
the front bearing (the one you can see behnd the cog with the timing cover off) is part number 6201 from same supplier.
the oil seal which is between the water seal and the front bearing is a 16x28x7
The big O ring is a 95mm x 2mm
I didn't need to disturb the rearward water pump but pretty sure the seal etc will be the same. Getting the front impeller off was easy enough with a puller, just warmed it up a bit and it slid off easy enough. looking at the design it would not be rocket science to make new impellers anyway. The vanes are just straight plates so turning a backplate and welding on vanes would be a possibility although if quantities were required a nice CNC job would be better.
A lot has been said about the difficulty of rebuilding the AJP water/oil pump assembly. I took mine apart for a small water leak and discovered that it's not that hard to rebuild. The oil pump rotors are available from TVR Power Stores off the shelf. Same part as in the S6 engine too I believe.
The ceramic water seals on the pump are part number IHF14.30.14 from City Seals and Bearings on 01142 435 343
the front bearing (the one you can see behnd the cog with the timing cover off) is part number 6201 from same supplier.
the oil seal which is between the water seal and the front bearing is a 16x28x7
The big O ring is a 95mm x 2mm
I didn't need to disturb the rearward water pump but pretty sure the seal etc will be the same. Getting the front impeller off was easy enough with a puller, just warmed it up a bit and it slid off easy enough. looking at the design it would not be rocket science to make new impellers anyway. The vanes are just straight plates so turning a backplate and welding on vanes would be a possibility although if quantities were required a nice CNC job would be better.
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