Trevor,
I have had my rocker feed kit in now for 2 years and only modified the hole
size about a month ago. I understood that the main aim of the feed kit was
to deliver oil to them on starting as the normal oil flow took some time to
reach the rockers. The continued supply of oil to the rockers while the
engine is running is not a problem as far as I can see, only the volume of
oil may cause a problem as in my case with leakage past the push rod tubes.
I had a think about your comments on the oil pressure, but it looks to me on
an external examination of my engine that the oil pressure measurement is
made essentially at the junction point where the oil is fed via the normal
route as well as the rocker feed kit, and hence wouldn't necessarily change.
However, at the end of the day, I guess this is largely academic. My aim was
to ensure that the engine doesn't suffer terminal failure in its advanced
years (currently +/- 110k miles), and any help in this direction will
hopefully extend its life.
Best regards
Chris Leah
-----Original Message-----
From: Trevor Jordan <tjordan@pa.ausom.net.au>
To: Chris Leah <crl@intekom.co.za>
Date: 24 June 1998 10:48
Subject: Re: re Rocker Arm Feed Kit
>Chris
>
>I can confirm that there is plenty of oil even with a 1.98 mm bore. When I
>first installed the line, it leaked and I lost about 1.5 litres of oil in 1
>to 2 minutes. A 1 mm bore should be quite sufficient.
>
>Does the line serve a function only during startup? I thought it was also
>to compensate for marginal oil flow to the head while the engine is
>operating. As for diverting oil from the main bearings, the measured oil
>pressure was not noticably lower after the line was installed, which I
>would have expected if there had been a serious diversion.
>
>However, after your comments, I am now considering replacing the banjo bolt
>with one which has a smaller bore. I am very interested in the results
>that you get. If you have not already installed the line, you could
>inspect the oil flow through the oil filler cap in the rocker cover before
>and after installation.
>
>Regards, Trevor Jordan
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