The V8 Owners Forum -

DEVONMAN wrote:Were the oil control ring gaps positioned correctly relative to the compression ring gaps

??... I put them in at 1/3rd around the pistons... but who knows where they are now.. the rings rotate in use....

If you have discounted everything else I would be checking the bores for ovality.

If the crankcase pressure is low, the rings are gapped right, and the stem seals are all good then that is all that is left.

Andrew

ETA

A silly thin oil could also contribute

May be... but it was okay before ...

It could be oil from the crankcase getting in via the inlet. Have you inspected that route for excess oilyness?

Chris.

As I say above, the plenum is nice and not a lot coming out of the flame trap (oil / water of gas)... pipes are very good.. you can stick your finger in and its not pick much up ...

Is the hone style correct for the piston rings your using? who did it?

That's an interesting one? No idea?? But the pistons complete with rings came from TVR Power. And they also did the hone

But it was Dom who did the hone and it sounded like he put a right cut on (I think he stalled the ...

It depends where you are really. Turners, JE Engineersing (not John eales as he has no real kit - all farmed out), David Knight although a few freinds of mine have not had great work from that workshop - not to be negative as I have never used his services - but a few freinds were not very ...

the gap was on top limit... but that said, people run a lose engine .001 thou over and they don't use oil?....
why would the gap cause it to use more?.. its the rings that stop it going north?

And yes.. all cylinders the same

Has anyone ever look in their cylinders with a bore scope?

I’ve been complaining about oil usage since my re-build winter before last.. It’s doing about 1500 miles per ltr so is not as bad as some 5 ltrs but I’m still not keen… I had a look the other day and you can see a gloss of oil / fuel on the ...

Well I took it out (5 mins of a job :) ) and its now running at 45 / 50 PSI according to the gauge at full chat?... does not drop much for tick over but it is a cold night out there so probably didn't get the oil hot in my 5 mile spin....

it's quite a weak spring but obviously does make a ...

Think Ill take it out.. see what it does... TBH its a small spring inside the std big one.. so probably does not do a lot???

I think mine was new, old stock... I replaced it about 3 years ago and it did read about the same as the original one... but maybe best checking it with a mechanical one... will see whats about ;)


also

what about hydraulic lifters.. have you got solids or hydraulic?... I would think high pressure ...

yes.. that was my thoughts.. chemical milling of the white metal .... LOL... can it happen????....
.
and it 60 PSI on the gauge actualy 60 PSI in reality.. how accurate is your TVR gauge to the mechanical one you checked it with

Hi Mike.. I was the builder... but I left the pump valve set up as it was before the re-build with a helper spring in there.....

The oilways are fine and it ran 2500 miles last year like this....

I would have thought pressure and flow go hand in hand... you will get better flow at a higher ...

Interesting. I wonder how helper springs work? They obviously just bring up the lower RPM pressure and not the final blow off pressure?

I re-built my engine last year and I'm still running on 20-50 valvoline mineral to bed in. Obviously with new bearings etc it's a tad tighter but also I had V8D fit a helper spring to the oil pump before the re-build to give it a boost...

So on the gauge its running at around 45 at tickover up to ...

yes.. he has them made special for the Ali blocks... so they go close to full depth....
they are also cheaper than ARP and very good quality ;)

only down side is they didn't have any Allen-Key hole in the end (although he did say the next batch would have it)... so I put a slit in the end of mine ...