Oil pressure Part 2
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- čas přidán 6. 09. 2024
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This video is produced for entertainment purposes only and Britannica Restorations nor Michael Wesson and/or guests featured in this video shall not, in any way or measure, be held accountable or responsible for any damages related to attempted repairs as pictured in this video.
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eagerly awaited episode 2, clicked play and then the front door bell rang.
Came back without my glasses on only to her Mike talking about rimming and holding a large green thing that made me thing they must have Anne Summers in Canada.
Freud would be deeply concerned about me.
There is kind of a similar problem with VW diesel engines. They have an intermediate shaft to drive the oilpump and the vacuum pump. The bearings for that shaft sit DIRECTLY after the oil pump/filter outlet. If you over-tension the cam belt, you will destroy those bearings in a very short time and you have zero oil pressure and as a bonus you pump the metal shavings of the destroyed bearings directly into the crank. It is a real nightmare to change those bearings. There are not many machine shops who do that job. I don't fancy that job either.
Good to know!
Its so common for oil water heat exchangers in cars now and fuel cooler heat exchanger too. Td5 prime example! Too complicated.
For a custom build i would much rather have a stand alone oil cooler because oil can take out lots of heat from the engine and surely thats better. What do these mass manufacturers know 😂
Great vid mike looking forward to part 3
The D2 V8 had external oil coolers - one for the transmission one for the engine
That was an excellent lesson in hydraulics and lubrication, professor.
RIP Bearmach. 😢
Thanks!
Good primer - I thought many car had water cooled oil coolers? Toyota is proud to have water cooled inter cooler...
What a mess when the td5 oil cooler orings go...dish washer tablets..and 6 months of repeating..replace all the upper hoses...then be aware of fake info about the torque for the cooler bolts....gota love a lanny..its awesome to watch the emulsified crap gushing out of the expansion tank😂
It just shows how critical tolerances and clearances are in engines. Thanks for the physics lesson - all interesting stuff.
Thanks for watching!
Dave Vizard , a well known professional engine tuner / engine whisperer , who big companies ( like Ford GM etc ) use to develop engines , wrote a very detailed book dealing with all aspects of improving the original Mini engines , which he used to race . One of his tips for oil pressure control , aiming to improve for reliability , was to do with the pressure relief valve . The valve is controlled by a spring with a cylindrical cap , pretty normal fare . His idea was that the cap would likely wear in the drilled tunnel it lives in and that it was better to reject the cap and replace it with a ball bearing . The ball shape , rather than the flat ended cap , would seal more reliably . I wonder if that idea might work in Landies ...... Dave's book is worth reading for A series Minis no doubt , but it also explains just about every aspect of engine tuning for racing and also economical driving , so anyone can glean something from it . Well worth a look .
On the 300Tdi there is a tube like plunger in the casting that opens to expose a port on the side. I think the 2.5 NA had a ball and the 200Tdi had a sleeve - not sure been a long time
Earlier in the year, I took a 200tdi oil pump assembly apart for inspection, was surprised to see a ball bearing where the parts manual showed a piston/cap.
Could have been an aftermarket part, or a updated part that came along after the parts diagram I was using was published.
It could have been changed
A lot of the heat in the engine oil probably comes from the Turbo and it necessitates the use of an engine oil cooler.
Wonder if a simple 13 row oil cooler in front of the radiator would be sufficient?
It could completely replace or even be connected in parallel (or even series on the return line) with stock integrated radiator oil cooler? Would be interesting to see the effect on engine oil temps on a sunny day (if we get one!).
Yes it would be a lot more efficient - that is one of the reasons the rear oil seals warp - hot oil from the turbo straight into the back of the sump
Disco or RR V8 coolers would work great
I would not worry too much about hot days in the UK! Besides the oil filter housing has a thermostat built in - cold oil on a hot engine is not good!
So beautiful explained, I know everything but its so nice to listen ! You should be a teacher in the University!
You know everything? Except adverbs perhaps? 😳😁🙏
Mike, I think the cam belt on a tdi is tensioned by a spring loaded tensioner. So the tension is set at a predefined level. Wouldn't the ware on the front cam shaft bearing be more likely to be from a lack of oil pressure? Possibly a secondary failing due to other problems elsewhere in the engine.
There is no spring tensioner on a 300Tdi
I always thought that the "in radiator" type heat exchanger helped to warm up the engine oil faster, to assist with flow, particularly in cold climates. Basically a double purpose function, it helps equalise temperatures across engine components.
I think 'oil cooler' is a bit of a giveaway! Lol!
why doesn't everyone watch this
I recently rebuilt a Rover v8 engine from a P38 Gems to mount it in a Discovery 1 Gems too, the situation is that the manual indicates that a correct oil pressure is something like 35 psi at 2500rpm, and the engine achieves them without problem, the situation that has me worried is, at operating temperature the oil pressure remains between 5-6 psi and the low pressure warning light flashes, what would be an "acceptable" oil pressure at idle?
Are you measuring that with a gauge? That seems very low.
The GEMS engine has a pump driven by the crank like a 300Tdi which is far better that the old 3.5 engine
From the manual
Pressure at idle - minimum 0.7 bar (10 lbf.in2)
Pressure at 2000 rev/min (hot) 3.4 bar (50 lbf.in2)
Relief valve opening pressure 3.4 bar (50 lbf.in2)
Low oil pressure switch opening pressure 0.24-0.41 bar (3.5-6.0 lbf.in2)
One more question, if you have a intercooler in front of the radiator, the heat will go to the vent and start moving the propeller. l had from Alisports intercooler the big one, I removed it very quickly, because overheating, or by cold weather so extremly cool, I had to cover it.
You may find some vehicles like the D2 with the V8 fitted the coolers at the bottom of the radiator, but lack of space is a problem
Yep, oil pressur problems can be caused anywhere, but the usual resulting catastrophic fail will be the big ends.
Yeap
I did not understand by 11.40 min with the circuit😮.