MR-HIPPO Posted June 4, 2023 Share Posted June 4, 2023 Obscure question I know, but would anyone here happen to know the physical dimensions of the O Ring that seals the Vacuum pump to the oil pump Skew gear. (200 TDI) Part number ERR532. This is the same part that is referenced in this post. Reason for asking. I have seen my oil light flicker at idle a few times after decent runs in warm weather and would like to rule this O ring out before I investigate further. ERR532 is showing as discontinued on several sites, and I was hoping I could just purchase the correct sized O ring to replace mine. I also plan on fitting an oil pressure gauge early next week to see what is actually going on. Has anyone here ever found this part to actually be the cause of low hot oil pressure? Thanks as always, Hippo. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted June 4, 2023 Share Posted June 4, 2023 This page gives the dimensions as 25x1.4mm: https://britcar.com/product.php/85105/1167/o_ring_small_drive_oil_pump_200tdi 1 Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted June 5, 2023 Share Posted June 5, 2023 It’s obsolete, but I used this one after speaking to Turner Engineering: https://www.turnerengineering.co.uk/rtc-6167-o-ring-c2x35431250 1 Quote Link to comment Share on other sites More sharing options...
smallfry Posted June 5, 2023 Share Posted June 5, 2023 Any bearing and seal supplier will be able to help you with that, or a handy box of nitrile O rings ? Quote Link to comment Share on other sites More sharing options...
MR-HIPPO Posted June 5, 2023 Author Share Posted June 5, 2023 Thank you for the replies. I feel like I learn something every time I come here. So for ERR532 use RTC 6167 (That should be on the LRW website) And it looks like Britcars dimensions should probably be taken with a pinch of salt as they show 25x1.4mm for ERR532 and 70x1.5mm for RTC6167. 1 Quote Link to comment Share on other sites More sharing options...
western Posted June 5, 2023 Share Posted June 5, 2023 Brit-car item dimension are the packet or box the item comes in NOT the item dimensions Quote Link to comment Share on other sites More sharing options...
MR-HIPPO Posted June 13, 2023 Author Share Posted June 13, 2023 OK, update on this. Mostly to answer my original question. For ERR532, I used RTC6167 (Thanks Retroanaconda for the heads-up). I measured the new O ring RTC6167 as best I could with my Lidl digital Vernier. My best estimate for the physical size of the O ring is 25.3 mm OD with a thickness of 3 mm. I was fitting this to rule it out as the source of low oil pressure, I fitted a capillary gauge last week, and it confirmed that with the engine up to temperature I have around 10 PSI at tickover. The old O ring inside the skew gear, sealing it to the vacuum pump was indeed very brittle and flat, however replacing it has made no difference to my oil pressure reading. Sadly, when removing the Vacuum pump, it popped out with the skew gear firmly attached, so I lost all reference as to how the skew gear & camshaft gear were originally meshed. There are lots of warnings about the skew gear / camshaft drive being a matched set once they have been used together, and apparently it is important to ensure that they mesh together in the same place. I really hope that this does not come back to bite me on the arse at a later date. So there it is, My 11L 200TDI engine is now suffering from a case of low oil pressure. Compounded with a dose of Skew gear / camshaft gear mesh misalignment. Not quite sure where to go from here. Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2023 Share Posted June 13, 2023 How old is the engine? how many miles? Has it been rebuilt before? My 200tdi was rebuilt after 24 years, my rebuild thread is on here, the main bearings were worn to copper, you should have more than 10psi on a cold engine at idle, more like 50psi with good bearings Quote Link to comment Share on other sites More sharing options...
MR-HIPPO Posted June 13, 2023 Author Share Posted June 13, 2023 (edited) !0 psi is hot idle. Cold is more like 40. Engine was purchased back in 2018. It was allegedly from a 88k ish vehicle. There was a green new owner slip with the engine, that was allegedly from the vehicle that the engine came from, the DVLA MOT history confirmed the mileage It is certainly one of the earlier 11Ls & and the FIP has been messed about with prior to my ownership. I have no reason to think that the engine has previously been rebuilt. But I have had to replace the head gasket, so I expect that this engine has more miles and has had a much harder life than I was led to believe. Was quite gutted to read that you need to separate the gearbox to remove the ladder frame on these, so popping a couple of bearing caps off and having a look inside is not a quick job. Edited June 13, 2023 by MR-HIPPO Quote Link to comment Share on other sites More sharing options...
western Posted June 14, 2023 Share Posted June 14, 2023 Your oil pressure sounds reasonable, mileage isn't overly high either, Yes on the 200 ladder frame has to come off to access the crank & main/big end bearings, Maybe worth replacing the oil pressure relief valve in oil pump as well. I can't remember if I marked my skew drive for vacuum pump, but as I fitted a new camshaft it didn't make much difference, engine is running fine since the rebuild nearly 6 years ago. Quote Link to comment Share on other sites More sharing options...
MR-HIPPO Posted June 14, 2023 Author Share Posted June 14, 2023 Thanks Western. As per my first post in this topic, I have seen my oil light flicker at idle a few times after decent runs in hot weather, although I have yet to witness this since installing the Pressure gauge. It kind of sucks getting stuck in traffic after a decent run, then having to keep the revs up to quell the oil light until the traffic clears. With the current weather, it only takes a four or five miles for the Oil pressure to drop to around the 10 / 12 psi mark at idle. Quote Link to comment Share on other sites More sharing options...
Hazza Posted June 14, 2023 Share Posted June 14, 2023 Have you tried changing the oil pressure switch? I had one which started to fail and would flicker the light at idle. Quote Link to comment Share on other sites More sharing options...
L19MUD Posted June 14, 2023 Share Posted June 14, 2023 II rebuilt my 200tdi 5-6 years and around 40k miles ago and I have seen the oil light flicker twice. Once it started doing it when warm but not a long run, I changed the oil and filter which cured it - I think it may have been a poor filter The second time was just this weekend after towing continuously at 60mph (honest guv) for 150 miles in 30 plus degrees heat. It just flickered before I shut it off in Tescos car park at idle, when I returned in 20 mins it did not come back so I presume it had got a bit hot and hence thin oil. The temp gauge was reading bang on the middle as normal I would change the oil and filter then go from there. Quote Link to comment Share on other sites More sharing options...
MR-HIPPO Posted June 14, 2023 Author Share Posted June 14, 2023 Thank you for the replies. I really should spend more time here. I have not changed the switch, I fitted the pressure gauge, and assumed that the rapid drop to around 10 PSI was proof that I had a low pressure problem. Will do an Oil and Filter change, the current filter is a genuine LR part, and the oil is 10w 40 semisynthetic. Quote Link to comment Share on other sites More sharing options...
western Posted June 14, 2023 Share Posted June 14, 2023 I only use Mahle filters now, Oil is OC261 Quote Link to comment Share on other sites More sharing options...
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