Worried about my D750

J

JosephGozo

Member

Equipment
Kubota B7001 + an ever growing list of attachments (restored / homemade) :(
Nov 25, 2014
83
36
18
Malta
Hi all,

Oil pressure gauge installed ( after lots of hassle to match NPT and BSPT threads! and clearing engine bits)

at start up/idle it is reading 40psi. (engine warm to touch)
after a few minutes of idle i ran it to full rpm and the needle kept crawling up to 60psi. (WSM that I have says pressure relief valve opens at 50psi. Still needs to be field tested though.

I also added a small water/oil separator in the breather pipe. I think it may be small and causing a restriction. I blew through it before installation a couple of times and did not feel like it is restricting blowby.

I am going to order a full engine gasket kit/liners/pistons/rings/extra head gaskets/bearing shells. I am very obsessed with having parts at hand before i strip things up. Not that many will take over after me once i am forced to pass it on! :D



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J

JosephGozo

Member

Equipment
Kubota B7001 + an ever growing list of attachments (restored / homemade) :(
Nov 25, 2014
83
36
18
Malta
b6100bob said:
What brand and weight motor oil are you running? Diesel rated? Excessively old motor oil not recommended to run. I think they say more than 3 years old. Calls for 10w-30 I believe. I have run 15-40 probably not recommended. To many small passages for it to work thru in the cold.
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I was using oil from a 20 litre can, Repsol 15w40 oil for diesel engines. Malta is a relatively warm place and temps never drop below 14'C during the day and as said it works hard.

Gave it a little work out, coolant was about 80'C (measured at the auto coolant pump) and oil pressure at full RPM was 40 to 50PSI. at idle the engine runs at a very very slow tickover but not erratic and presssure drops to about 20 psi.

I will check Valve adjustment and wait for headgasket kit to arrive. That is the next thing on the list.
 
R

Russell King

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Jun 17, 2012
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So what is the oil pressure light doing now with a new sensor?
 
J

JosephGozo

Member

Equipment
Kubota B7001 + an ever growing list of attachments (restored / homemade) :(
Nov 25, 2014
83
36
18
Malta
Hello. I.m quite reassured oil pressure is kind of ok. 15w40 may be thick but in hot weather it thins out. Compression test coming up soon. I may borrow a guage next week. The mechanic on e again said rings... But i dont know, It still runs clean (exhaust)

I.m just overwhelmed with things to do. I feel tired. Engine rebuilds are cool ... But a good used unit? The hassle to fit a d950!?!? :⁠'⁠(
 
North Idaho Wolfman

North Idaho Wolfman

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JosephGozo said:
Hello. I.m quite reassured oil pressure is kind of ok. 15w40 may be thick but in hot weather it thins out. Compression test coming up soon. I may borrow a guage next week. The mechanic on e again said rings... But i dont know, It still runs clean (exhaust)

I.m just overwhelmed with things to do. I feel tired. Engine rebuilds are cool ... But a good used unit? The hassle to fit a d950!?!? :⁠'⁠(
Click to expand...
No hassle at all putting a D950 in it, I have several, everything is a direct swap or bolt on.
 
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