I have terrible rocker noise and believe it to be lack of oil north of the
valves too, and was considering adding the external oil line that is so
commonly discussed. Then I read Randall's parting comments "I'd probably try
that again, even though it eventually cost me a broken piston last time I
tried it." ACK! Randall, you should be a novelist with cliffhangers like
that! Can you elaborate just a bit???
Is there anyone out there that HAS added this external oiler successfully
and has cured top end issues??
Date: Tue, 25 Mar 2008 16:41:45 -0700
From: "Randall" <email@example.com>
Subject: Re: [TR] TR6 rocker assembly oiling
Content-Type: text/plain; charset="us-ascii"
> What could be restricting flow? How do I troubleshoot and fix
> short of dismantling the entire engine?
Any chance you (or someone) has had cam bearing inserts added ? On the
TR2-4 with the factory inserts, it's a common mistake to install the rear
insert in the wrong position, which will block oil flow to the head. I
assume the same issue applies when a TR6 is bored for inserts.
Have you tried blowing into the hole in the rear pedestal ?
There is a plug on the back of the head that you can remove and try forcing
oil (or similar) into, it should show up in the rocker shaft. If not,
remove the shaft and try again. If it now squirts out the hole in the head,
then the rocker shaft must be blocked somehow.
If forcing oil into the hole oils the rocker shaft, then the problem must be
inside the engine. You can try poking a wire into the hole to try to open
the lateral drilling through the head, but otherwise I'm afraid the head has
to come off.
Or, you could add the external oil feed (which injects oil under full
pressure into that hole). I'd probably try that again, even though it
eventually cost me a broken piston last time I tried it.
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