Man, I was getting 8 mpg to 9 mpg on the old Main and old cam bearings with the old worn camshaft and multiple leaking valves.

It was one heckofa project! Lapped the valves to stop those leaks. Replaced the valve seals, too. Replaced the old bearings with high quality new ones. Ground the crank to perfection. Installed the new cam with new lifters.

Plus, I had a wiring harness ground issue such that the driver side front O2 sensor's data wasn't reaching the engine computer. I had to run a new wire from that O2 sensor all of the way to the ECU, and cut off the factory wire to the ECU for it because it was grounding out the data signal.

So *now* my Disco finally goes into "closed loop". Oh, and the O2 sensors are new in front.

All of this work and I still haven't installed the new rear O2 sensors yet. Go figure.





Oh wait, there was more! I also had an exhaust leak out of the passenger side downpipe due to a broken stud. So I fixed that with a new stud and new nut.


It took all of the above plus the Hayden fan clutch to get to 15.1mpg! Sheesh. It's essentially a brand new motor now. Maybe better. I used better bearings and cam than Land Rover used from the factory new.

 

Recently wired up my Hella Lights and mounted a switch in the overhead panel that houses the sunroof switch. Works pretty slick!

 

So someone plugged the entire SAI on my engine. There's not even the SAI pipes on it, just welded-shut plugs into the motor. Except, they left the SAI pump in the engine bay!

Go figure.

Well, today I'm pulling that SAI pump out of the Disco and using its bracket for an automatic fire extinguisher for the engine bay.

...and this Disco gets a new air filter today. Whoo Hoo!

 

I went with the Crower 53231 and a set of Rhoads lifters. And let me say, it ran great for about half an hour after break in.

And no, the cam didn't round off. It appears to be fine.

That said, I got to town and lost oil pressure again. Then it came back, full 50 psi, then I lost it again. I dropped the oil pan in the Shell station parking lot hoping something got dropped and was stuck to the bottom of the pickup tube. No luck.

Theeeennnn, I got a little oil pressure back. I limped it to O'Reilly's. Bought a snap ring tool and pulled the pressure relief valve out. Guess what else wasn't the problem.? The spring was fine, it appears to move free. I popped a couple washers under it in the cap to shim it up anyway to see if that would make a difference.

Nope. Actually worse this time. Not a single pound of pressure.

I'm bumfuzzled. I'm afraid a cam bearing may have rotated in it's bore or something. I'm frustrated and now I'm leaving town Sunday, so no time to tear it back down. It will be more than a week until it gets touched.

On the bright side, if it's totally dicked then my girlfriend's D2 is going to get a really nice set of cam and lifters when it gets head gaskets. The down side is that mine would sit until I could afford an engine swap.

I dunno. I guess we'll find out eventually.

 

Did some mall crawling today

 

Dang!


I'd swap oil filters and give it a brief try before tearing it down again. Just a thought.

 

Already did. There was lots of foamy oil that came out from the first one when I pulled it, so there's a bunch of cavitation happening for some reason too.

 

Cavitation usually is caused by low oil, starvation and or a faulty pump. If the pump is relatively new, I'd start looking at drainage from the heads. Maybe the oil isn't coming back down and that's why you have no pressure. If I remember correctly, the drains in these aren't very big

 

I'm thinking the cavitation isn't the cause of the low pressure ,but a result of whatever is causing it, because my oil level is showing fine immediately after shutting down and it was somehow worse after it sat for about half an hour, which should've given some of the bubbles time to work out.

 

OK. Whenever an oil pump can't get enough fluid on its inlet side, cavitation occurs (when oil cant flow into the pump fast enough to match pump’s intake volume, air is pulled out of the oil... typically 9% of oil is air).

The flip side is that foamy oil isn't *always* from cavitation. You can also get foamy oil from aeration... maybe exhaust gas blowing into an oil chamber.