Ja defender Posted January 15, 2015 Share Posted January 15, 2015 Good day, Although I have read most if not all the post regarding low oil pressure problems, all the remedies suggested have not been applicable to me current problem. I recently bought a used 200tdi engine. On starting and testing I noticed a flickering oil light at idle. I rebuilt the engine in an attempt to resolve this problem. As the usual cam bearing problem was not seen ( bearing had not shifted or spun) my attention was turned to the other bearings, passages and possible contributors. I had the crank was cut to .020 on both main and Conrod. New oil pump was fitted alone with new pistons. One of the oil jets was also broken and therefore replaced. On starting the engine after the rebuild I am amazed to find 30 psi at cold idle, 45psi at driving rpm and 7psi at hot idle and 40 psi at driving rpm. Does anyone have any suggestions or a detailed oil flow diagram that's could assist me identifying the cause of this problem? Regards. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 16, 2015 Share Posted January 16, 2015 What make was the oil pump? Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 16, 2015 Author Share Posted January 16, 2015 The oil pump is now a Land Rover brand, I had previously bought the rebuild kit from Turners, but later replaced the entire pump. Quote Link to comment Share on other sites More sharing options...
Team Idris Posted January 17, 2015 Share Posted January 17, 2015 The odd ones include; Cracked pick up pipe, Bad suction gasket, Debris in pickup pipe, Some obscure seal is duff. Some restrict or is missing (rocker) Those are generic engine faults. you can't have lost a core plug as there would be no pressure. I would check that it isn't gushing out of the rocker assembly. It's just a cast gallery down the side of the block on almost everything, that is drilled through to the mains. Other than gaskets at the ends there isn't much to go wrong? Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted January 17, 2015 Share Posted January 17, 2015 Is the gauge your using any good and where is it reading from? A flickering light could just be a duff sender. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 17, 2015 Author Share Posted January 17, 2015 Thank you for the list Team Idris, I would like to do a detailed check of these areas mentioned as it my believe there is an open or unrestricted flow somewhere in the oil path. For this reason I would like a detailed diagram of the oil path. Can you say if the banjo bolt fitted to the turbo oil supply line should have some restriction in it? Vulcan Bomber I am using a mechanical gauge to measure the pressure. Quote Link to comment Share on other sites More sharing options...
western Posted January 17, 2015 Share Posted January 17, 2015 For this reason I would like a detailed diagram of the oil path Defender 200tdi Lubrication oil route diagrams from workshop manual hth Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 21, 2015 Author Share Posted January 21, 2015 Recovery Man, Thank you for this diagram, this will help greatly in trying to determine the cause my low oil pressure problem. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 21, 2015 Author Share Posted January 21, 2015 Just on a point of clarity, does the O ring for the oil pickup pipe fits on the pipe or between the pipe and the pump body. I have noticed the manuals showing this o ring in front of the pipe rather than over the pipe, between the washer and the pipe flange, which is where I have mine installed. Quote Link to comment Share on other sites More sharing options...
western Posted January 21, 2015 Share Posted January 21, 2015 never had my oil pump or strainer out of my 200tdi, so can't say for sure where or how that O ring fits, doubt it'll cause low oil pressure. in here http://www.retroanaconda.com/landrover/parts_books/110/3_engine_200TDI_300TDI_V8_p168-299.pdf page 182, shows O ring item 17 forward of the lock washer item 18. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 26, 2015 Author Share Posted January 26, 2015 That's what I had noticed as in the manuals it appears to be between the pipe and the pump however it was really fitted on the pickup pipe. I have used the diagram and I have gone over all the possible problem areas with the cam, crank and turbo checking out okay. Could a leaking or ill fitted oil jet cause the lost in oil pressure I am experiencing? Quote Link to comment Share on other sites More sharing options...
Snagger Posted January 26, 2015 Share Posted January 26, 2015 Check your turbo charger for worn bearings - if they have excess movement, they will allow too much oil flow and divert oil away from the other parts of the engine. I also removed the washer from around the oil cooler thermostat (inside the filter housing neck) as it causes too much of a restriction when warm. The oil temperature went up fractionally when running hard on the motorway, but the pressure went up considerably. The rest of the thermostat is still there. What oil are you using? Quote Link to comment Share on other sites More sharing options...
Ja defender Posted January 27, 2015 Author Share Posted January 27, 2015 I had consider the lost via the turbo and disconnect the oil feed from the turbo and blocked it off, still no improvement in the oil pressure. I am using 10w-40 oil. I will look at the washer on the stat however do you have any idea how the oil spray jets work. I also wonder if it is possible for oil pressure to be lost from these jets? Quote Link to comment Share on other sites More sharing options...
Tanuki Posted January 27, 2015 Share Posted January 27, 2015 Check the crankshaft: On a Triumph I worked on, it suddenly developed low oil pressure. On this engine the oilways in the crank that coupled the main bearings to the big-ends had screw-in metal blanking plugs to close off the holes where the oilways had been drilled. When the crank had been reground the regrinder rightfully removed the plugs to clear out any crud from the oilways. One of the plugs hadn't been tightened up correctly and after a few thousand miles escaped from its hole - leaving a passage from the main-bearing circumferential oil channel directly back to the sump down which all the oil pressure escaped. Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted January 28, 2015 Share Posted January 28, 2015 What was the oil clearances like when you checked it during assembly? Pumps dont create pressure. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted February 7, 2015 Author Share Posted February 7, 2015 Both main and con rods were .0015", measured with plastigauge. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted February 7, 2015 Author Share Posted February 7, 2015 What's the best way to check the relieve valves on the oil jets? Quote Link to comment Share on other sites More sharing options...
western Posted February 7, 2015 Share Posted February 7, 2015 no relief valves in the oil spray jets to underside of pistons, only the oil pressure relief valve in oil pump body according to my 200tdi workshop manual engine section. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted February 9, 2015 Author Share Posted February 9, 2015 There is in fact a relive valve in the banjo bolt which secure the jets to the block. I actually used a air compressor to determing the opening pressure which turns out to be about 26 psi. That discovery has just added one more possible contributor which I now know is operating fine. My camshaft bearing are in place and have not moved, how do I however check their clearances? This low oil pressure really has me challenged. Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted February 9, 2015 Share Posted February 9, 2015 Inside micromiter for the cam bearings. Good you found them and they are in perfect order. What about the restrictor for the cylinder head oil channel, for the rocker shafts, if that oil hole is to big the oil pressure will suffer. Quote Link to comment Share on other sites More sharing options...
western Posted February 9, 2015 Share Posted February 9, 2015 There is in fact a relive valve in the banjo bolt which secure the jets to the block. I actually used a air compressor to determing the opening pressure which turns out to be about 26 psi. That discovery has just added one more possible contributor which I now know is operating fine. Well that's something I've learnt today, never had the bottom end of my 200tdi apart, so didn't know the bolts had internal valves. Quote Link to comment Share on other sites More sharing options...
Ja defender Posted February 10, 2015 Author Share Posted February 10, 2015 Thanks, I am now about to turn my attention to the upper half of the engine. Do you have a photo showing where this restrictor is or know the size of the oil Chanel in the in the head? I refuse to be beaten by this problem and intend to continue until the source of this problem is found. I therefore welcome any ideas on the possible problem 1 Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted February 10, 2015 Share Posted February 10, 2015 Was the head removed before this concern started? The restriction is in the head gasket like the 300Tdi if not mistaken, there is no specific size in the workshop manual as far as I could determain, I may be wrong on this one. The size I like in the head gasket is 1mm Quote Link to comment Share on other sites More sharing options...
Ja defender Posted February 11, 2015 Author Share Posted February 11, 2015 The problem started before the head was removed. I got the engine with this problem, although the vehicle was driving the oil light switch was not working. I pull the engine apart after replacing the switch and found the light flickering at idle. I took the engine apart but found nothing unusual during my examination of the engine then. I am now in the process of doing a more detailed examination of all the suspected areas with the hope of finding the reason for the low oil pressure during normal tempature idle. Quote Link to comment Share on other sites More sharing options...
western Posted February 11, 2015 Share Posted February 11, 2015 Is the idle speed set correctly,, 750 to 800rpm, if to low oil light will flicker, mine did. Quote Link to comment Share on other sites More sharing options...
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