Cameron
If you decide to reinstall the oil line, check the size of the hole in the
banjo bolt. I have had two bolts (please do not ask why I needed a
replacement) and the cross-sectional area of the holes varied by about 3 to
1. This would have a big effect on the volume of oil to the head.
Different size holes are available, but appear to be supplied randomly with
the lines. With the oil pressure that you have, I would expect a diameter
of 1 to 1.5 mm to be sufficient. Shop around, see what is available, and
use the smallest hole to begin with.
Trevor Jordan
74 TR6 CF29281U
At 7:22 PM +1000 25/6/99, cameron greig wrote:
>Hi all
>
>I thought I would let you all know how the problem with my TR6 was finally
>resolved.
>The car was using oil,but only produced smoke when starting,either from cold
>or if restarted hot,little or no smoke was visable during acceleration or
>over run.
>The head had been rebuilt 5000 miles ago with new valves,springs,and
>guides,and the cylinder compressions are all 175 with only a 2psi variation.
>The car was also fitted with a secondery oil feed to the head and runs with
>a high oil pressure (100psi+ at cold startup droping to a min of 70psi at
>hot idle).
>I felt that the problem was due to a combination of the high oil pressure
>and the secondary oil feed,producing a large quantity of oil and oil vapour
>,which was on standing seeping past the valve guides and being burned off
>when the engine is fired up.
>I decided to reduce the oil pressure by shortning the oil relief spring,this
>resulted in a 70psi at cold startup to a min of 45psi at hot idle. I have
>also removed the secondary oil feed for the moment. My question to you all
>is now that I have found the cause do I run with lower oil pressure and no
>secondary oil feed or should I use one of the other possible combinations ie
>high pressure no feed,or maybe low pressure with feed,all constructive
>comments welcolme.
>
>Cameron
>71 TR6 150bhp
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