The V8 Owners Forum -

Have you run it at 2000 rpm for a while to help bed in the rings?

Ian

ChrisJC wrote: ↑Mon May 06, 2019 7:22 pm The Thor engine (final incarnation in P38 Range Rover / Disco II) runs at about 60PSI.

If you completely remove the crankcase ventilation system (so it just breaths to atmosphere), and plug any holes into the carb / inlet manifold, does it still do it?

Chris.

Thanks Chris
I'll give it try next opportunity. guessing that would point to rings/guides?
I'll try it first and see..

Ian Anderson wrote: ↑Mon May 06, 2019 8:34 pm Have you run it at 2000 rpm for a while to help bed in the rings?

Ian

Hi Ian
I've stopped each time (about 5 or 6 now) after about a minute as smoke just seems to be getting thicker and didn't want to be damaging anything/blowing seals etc. This time possibly slower to start smoking and maybe not so thick but it seemed to be getting thicker.
I used some of that graphite paste in re build but not in bores, just new oil. It could be making the smoke seem more intense maybe as it's coloured the oil quite a bit I noticed when watching the flow over rockers, and when I drained it to check quantity.

If the oil pressure sounds ok to you and I should just run it for a while (five, ten, fifteen, mins) at 2000 to see if it starts to clear then happy to give it a go. So long as I'm not damaging anything I've nothing to lose I guess. Engine lovely and quiet/smooth.
Cheers
Sim

Ian Anderson wrote: ↑Mon May 06, 2019 8:34 pm Have you run it at 2000 rpm for a while to help bed in the rings?

Ian

Had a bit of time today so ran it up for about 15/20 mins first time and smoke built then started to fade to almost non existent on one side.
Running with electric fans so gave it a break to cool once heater needle started to move.
Ran it up again about 15 mins later for another fifteen and negligible smoke.
I took off one of the rocker cover breathers (I'll link them into the air cleaner as I did on previous engine) and it was puffing blue gently.
Time to get the clutch bled and get some more time on it, leak check etc
So far so good.
will say what happens after some more time..
Thanks for input
Sim

That sounds like a bit of a result, hope it continues to improve

Ian

Ian Anderson wrote: ↑Mon May 06, 2019 8:34 pm Have you run it at 2000 rpm for a while to help bed in the rings?

Ian

running at 2000 RPM will bed the cam in but it won't bed the rings in. You need gas pressure behind the rings to bed them in and the only way you can do that it by putting the engine under load for short periods of time. In fact bedding the cam in is detrimental to bedding the rings in which is APITA.

You have a 50/100 mile window approx post cam break-in to load up & scuff those rings in IMO after this things are a lot slower happening

SimpleSimon wrote: ↑Wed May 22, 2019 9:54 pm You have a 50/100 mile window approx post cam break-in to load up & scuff those rings in IMO after this things are a lot slower happening

Thanks.
Sorting out the clutch, last brake to pipe fit etc (and what I've got stored in the back of it) so I can get some street time on it.
Appreciate the info

Sim