Cam freshen up
As you may be well aware in recent past I have had a ton of trouble with my '89 RRC getting it to start and run, then the resulting carnival ride to sort the issue and have a happy and healthy roadable Rangie.
Since moving back to SA I have freshened up the front end, fitted new tyres and where money + weather allowed, slowly sorting out the little niggly things.
Well aside from a leaking power steering system and the engine fan exploding, it has been doing pretty well. For blocks at a time it does my 160km daily trek to work and home and still get the ugly tow jobs instead of the Disco. Whilst doing this, it has had a very thirsty appetite. Currently getting around 20-24 L/100.
I hope to reduce this by replacing the cam and using a 10W-40 HPR10 oil.
So over the last day, dodging this awesome temperature, I have removed the old cam. I found that there were no shims under the rocker pedestals, one of the followers didn't have a retaining clip and the distributor drive gear is worn again after only 10k km..
To note there was less wear on the cam than I expected and the followers weren't as concaved as I have seen on the web. From measuring the old and new cam lobes, there was on average 0.01" of wear. Randomly on No. 7 intake, there was 0.04" of wear. Working it out with the rocker ratio the valve is 0.064" (1.76mm) less open than it should be. The ideal outcome would for the car to have more torque than it has and make cruising at 100kmh a little less arduous.
My plan is to fit the 3.9 EFi cam and degree it in properly to gain a bit more of that bottom end. I don't have huge expectations though, just want a little more smoothness.
Oddly, the cam I pulled out has HRC 1619 on it, which research leads me to believe is the 3.9 cam already.. maybe I won't get too much change at all...
'15 Discovery 4 HSE- The family bus and the kids like it!
'89 RRC- My favorite of the bunch!
Ex '03 Commodore 'S' ute- 450hp of uncracked 5.7lt and 6 speed manual uteness - Still crying that its gone
Ex '06 GLXR Triton- *Gone and forgotten*
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