2002 Disco Low Oil Pressure
#1
2002 Disco Low Oil Pressure
Hey Everyone,
I'm in the middle of a Disco 2 build and I'm trying to troubleshoot a low oil pressure issue. To summarize I bought a 2002 Disco for cheap, drove it maybe 200 miles of highway driving home without issue. Next day I try to drive it in the city and it immediately overheats; still no check oil or engine light. I take it apart and the heads are a mess, but the rest of the engine internals look good. I do some part replacement, fire it up, and it sounds great. Oil light flickers on and off at hot and cold idle which is new, so I just put a cheap Harbor Freight gauge on it, here are the reading I got:
Initial startup: 32 PSI
Initial Cold Idle (1k RPM): 8 PSI
Steady Cold Idle (750 RPM) 6 PSI
2K RPM Cold: 16 PSI
Steady Hot Idle (700 RPM) 7 PSI
2K RPM Hot: 14 PSI
Engine has 82k on it, and is now running Shell Rotella 15w40 T4 with a Fram Filter. Vehicle hasn't left the driveway yet, put plan was to run crap filter and this oil for 50 miles or so, and then run Rotella 15w40 T6 and a better filter.
Brief Summary of the work I've done is:
Head Gasket Replacement w/ New Bolts
Heads Machined & Tested
New Complete Rocker Assemblies
New Lifters
New Push Rods
New Water Pump
New Plugs & Wires
New Oil Pump (Old Pump Looked Fine)
New Timing Gear & Chain
New Main Seal
New Plugs & Wires
New 180 Thermostat
Cleaned Timing Cover
Cleaned Oil Passages in Block (Very Clean)
Cleaned Oil Pickup (Not clogged) w/ New O-Ring
Cleaned Oil Pan (Some Sludge at Bottom)
Misc Gaskets Replaced During Head Job
The thread can be found here: https://landroverforums.com/forum/bu...ild-nh-101158/
But to generalize I started with this:
And brought it to this:
Anyone have suggestions? What are the minimum PSI requirement I should be looking with a Disco of this age and miles? Appreciate the help.
Oh; and it doesn't overheat now.
I'm in the middle of a Disco 2 build and I'm trying to troubleshoot a low oil pressure issue. To summarize I bought a 2002 Disco for cheap, drove it maybe 200 miles of highway driving home without issue. Next day I try to drive it in the city and it immediately overheats; still no check oil or engine light. I take it apart and the heads are a mess, but the rest of the engine internals look good. I do some part replacement, fire it up, and it sounds great. Oil light flickers on and off at hot and cold idle which is new, so I just put a cheap Harbor Freight gauge on it, here are the reading I got:
Initial startup: 32 PSI
Initial Cold Idle (1k RPM): 8 PSI
Steady Cold Idle (750 RPM) 6 PSI
2K RPM Cold: 16 PSI
Steady Hot Idle (700 RPM) 7 PSI
2K RPM Hot: 14 PSI
Engine has 82k on it, and is now running Shell Rotella 15w40 T4 with a Fram Filter. Vehicle hasn't left the driveway yet, put plan was to run crap filter and this oil for 50 miles or so, and then run Rotella 15w40 T6 and a better filter.
Brief Summary of the work I've done is:
Head Gasket Replacement w/ New Bolts
Heads Machined & Tested
New Complete Rocker Assemblies
New Lifters
New Push Rods
New Water Pump
New Plugs & Wires
New Oil Pump (Old Pump Looked Fine)
New Timing Gear & Chain
New Main Seal
New Plugs & Wires
New 180 Thermostat
Cleaned Timing Cover
Cleaned Oil Passages in Block (Very Clean)
Cleaned Oil Pickup (Not clogged) w/ New O-Ring
Cleaned Oil Pan (Some Sludge at Bottom)
Misc Gaskets Replaced During Head Job
The thread can be found here: https://landroverforums.com/forum/bu...ild-nh-101158/
But to generalize I started with this:
And brought it to this:
Anyone have suggestions? What are the minimum PSI requirement I should be looking with a Disco of this age and miles? Appreciate the help.
Oh; and it doesn't overheat now.
Last edited by Ferrarone; 08-28-2020 at 01:42 PM.
#3
Well you could try a new oil pressure switch, but those readings are pretty low and 7/8psi is when the oil light comes on. I would say you either have a walked cam bearing or worn main bearings.
When the light flickers does the engine sound any different?
When the light flickers does the engine sound any different?
Last edited by Best4x4; 08-28-2020 at 01:52 PM.
#4
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#9
I just dropped the pan and pulled the timing cover off. The oil pump gear is not broken, and the oil pickup tube has a good o-ring seal. I’ll take some pictures of what I can see tomorrow as far as cam bearings. Not too sure what I’m looking for though. Thanks for the help all.
#10