I am wondering if I might have some clogged oil passages

690 Views 7 Replies 7 Participants Last post by at.real.ask, 11 d ago

Wyo

I am calibrating my gauges on my 2000 SE XJ and as part of this I installed a mech gauge at the sensor as I converted to the gauge cluster from the stock idiot light pkg.

Running some 10-30 syn post a couple of serious oil flushes with the ATC oil flush packages, I got out some serious nasty garbage out of the engine which is @ 185K. on the mech gauge I am showing nearly 60 PSI
cold @ 60 degrees and 45 psi hot @ 195, This seems rather high for it's age/mileage so I am wondering if I still have restricted flow. these #s are all @ Idle speed.

What say you?

This is after a few minutes and temp coming coming up to warm to the touch on the hoses and the filter

And this is full temp @ 195 T-stat open

I love how my gauge needles came out after refurbing them with Gauge needle paint the photo flash does not do justice, they look brand new and light perfectly. what a ditsy job though... ignore the post-it marks
they were relevant during initial needle reinsertion.

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Saudade

· #2 · 14 d ago

The FSM says the min oil pressure @ idle is 13psi, @1600 rpms (or higher) is 37-75 PSI. Oil pressure relief is at 75psi. Engine should be at full temp when checking pressure and level.

If you're not hearing any excessive noise (knocking, ticking, etc.), I wouldn't worry about it. Does it correlate with the new dash gauge? Accounting for the angle of your pic, it looks OK.

You can always pull the valve cover off and check the valve train for residual sludge/buildup. Perhaps another oil change after a few hundred miles.

You should also document the mileage difference (mount a sticker somewhere) in case you decide to sell it at some future time.

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Wyo

Discussion Starter · #3 · 14 d ago (Edited)

Saudade said:
The FSM says the min oil pressure @ idle is 13psi, @1600 rpms (or higher) is 37-75 PSI. Oil pressure relief is at 75psi. Engine should be at full temp when checking pressure and level.

If you're not hearing any excessive noise (knocking, ticking, etc.), I wouldn't worry about it. Does it correlate with the new dash gauge? Accounting for the angle of your pic, it looks OK.

You can always pull the valve cover off and check the valve train for residual sludge/buildup. Perhaps another oil change after a few hundred miles.

You should also document the mileage difference (mount a sticker somewhere) in case you decide to sell it at some future time.

It will definitely be getting a couple more changes, I have to change the diffs post regear @ 500 miles, so I will do the oil at the same time, there are no old fluids anywhere in the jeep at this point. I have had both the pan and the VC off at an initial point and cleaned the hell out of both. I intend on having it on the road in June.

Ast to the gauges I have it about as close to the mech as is realistic given the delays etc I would wager it reads within a 2-4 psi range depending on the moment.

Got the fuel sorted and the temp, and I need to swap the gear in the T-case to match the 33s and the regear and
then verify via GPS.... once I got that done and all reads Ok I will reprogram the Odo. to a correct value and vin.

I am trying to close in on all the deets, after this its strip the interior, weather strip carpet and seat upholstery and I gotta install the clock spring and buttons for cruise control... In WY I want cruise control no doubt, I love manual everything but cruise is a deal for me out here.... oh yeah and the windows....... just a irritant with the windows.
every one destroyed with deep scraping scratches...... they had to have used a putty knife or something...
who the F does this??? Every one you can catch in your fingernail too....

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cruiser54

· #4 · 13 d ago

Shine a light into the oil filler hole and assess the sludge.

If it were mine, I would just drive it and smile.

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Fourspeedman

· #5 · 13 d ago

If I had oil pressure like that I would have smile-itis. As it is, at 180k I have about 55 cold, and about 25-30 hot. Driving it runs around 40-50. This is with no flush ever and 0-W40 Mobile 1. I did have the valve cover off to do the gasket and it was pretty clean inside. I think you have a diamond in the rough there.

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BobF90

· #6 · 12 d ago

You can cut the oil filter open on your next oil change and see what's coming out. It might give you a clue. I do like the suggestion of pulling the valve cover and taking a peek.

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drdozer8

· #7 · 11 d ago

might check your cam bearings

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at.real.ask

· #8 · 11 d ago

One night I noticed my oil pressure had increased from it's usual 40 - 50 psi to 60 plus psi. The next day it got to 80 psi. There were no engine noises and the oil was full and looked fine.

I read someplace online that a defective oil sending unit would cause an artificially low or high reading on the gauge. There is a way to test the ohm output to determine if it's defective.

I took mine out and discovered it had gotten clogged so I cleaned it out with a paper clip, then sprayed some electrical cleaner in it to get the rest of the gunk out, reinstalled it and the gauge has worked fine since. Your sending unit looks new so this may not apply, although your engine cleaning may have clogged it.

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