JochemsTR Posted May 26, 2019 Report Share Posted May 26, 2019 For my engine #2 I am looking for some new components... currently Oilpump is on my list....are the aftermarket ones any good? Or rather buy a used one from Ebay? Jochem Quote Link to post Share on other sites
stuart Posted May 26, 2019 Report Share Posted May 26, 2019 34 minutes ago, JochemsTR said: For my engine #2 I am looking for some new components... currently Oilpump is on my list....are the aftermarket ones any good? Or rather buy a used one from Ebay? Jochem Chris Witor https://www.chriswitor.com/proddetail.php?prod=217488RP Stuart. Quote Link to post Share on other sites
Waldi Posted May 26, 2019 Report Share Posted May 26, 2019 I have a new oil pump from Chris Wittor. Since I measure all my new conponents and compare with the old ones I noted: The internal clearances were all ok. The 3 hex head screws are 10 mm, so I re-used my old ones. The drive shaft was quitte a bit smaller in diameter which results in more oil loss through the bushing. The drive shaft was a 1-2 mm shorter, which results in less grip in the drive key. Oil pressure on my reconditioned engine is good with this pump however. Others have reported spanes from machining in the new pump, mine was clean, but knowing you by now, you will check it:) So not a perfect pump, but I found it acceptable. Waldi Quote Link to post Share on other sites
ed_h Posted May 26, 2019 Report Share Posted May 26, 2019 (edited) My experience was similar to Waldi's. It appears that most if not all of these aftermarket pumps are a work in progress when you receive them. http://bullfire.net/TR6/TR6-13/TR6-13.html Ed Edited May 26, 2019 by ed_h Quote Link to post Share on other sites
Tom Fremont Posted May 26, 2019 Report Share Posted May 26, 2019 Years ago I bought some OE internals, several sets comprising the shaft, sleeve but not housing. One or two measured in spec with at least (3) having excess clearances. Mixing and matching helped. I fitted one to my driver. I'm fixed for the duration with at least one good set for the next new engine but I'm sorry to see the ones available today are sub-par. Tom Quote Link to post Share on other sites
Waldi Posted May 26, 2019 Report Share Posted May 26, 2019 Roger, do you want me to raise a PQI? I have all measuements, pictures available to back this up. Note: this is not a fault of Chris Wittor, it is a manufacturer fault, the lid has “powertune” cast in letters. I forgot to mention: the inlet sieve was not good either, the woven metal was very close to the suction pipe and it cannot be swapped for the original item (which was better), because the tread was different. With minimal changes, this can be made a good pump by the manufacturer, AT NO EXTRA COST. Waldi Quote Link to post Share on other sites
RogerH Posted May 26, 2019 Report Share Posted May 26, 2019 Hi Waldi, PM sent Roger Quote Link to post Share on other sites
JochemsTR Posted May 26, 2019 Author Report Share Posted May 26, 2019 4 hours ago, Waldi said: but knowing you by now, you will check it:) Waldi, you are correct. Jochem Quote Link to post Share on other sites
JochemsTR Posted May 26, 2019 Author Report Share Posted May 26, 2019 I will probably go with Ed. Finding 1 or 2 used on Ebay, and buy one new from Chris or the other Web Suppliers. Some may call this overkill, but with the Oilpump I rather do not take any risks. Jochem Quote Link to post Share on other sites
JochemsTR Posted July 1, 2019 Author Report Share Posted July 1, 2019 I bought 2 used original pumps from ebay. In both cases the clearance between inner and outer rotor exceeds the max allowable... Now I will buy a new one from our suppliers and see what that brings me. Third time is a .... Jochem Quote Link to post Share on other sites
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