I've been through most of this a few years ago, and can actually
forward information from the pre tr-list days. :-)
A fresh TR6 engine Oil pressure values:
Cold Idle 90+
Cold Running 100
Warm Idle 40
Warm Running 70
A worn TR6 engine might look like this, based on my engine before rebuild:
Cold Idle 50
Cold Running 70
Warm Idle 15
Warm Running 50
In some cases, replacing the big-end bearings on the connecting rods
will help low idle oil pressure. The low pressure can be an indicator
to the fact that there is slop there, and oil leaks out falling back
into the oil pan. Removal of the pan and replacement of these
bearings is a simple fix if a rebuild is not possible. Some manuals
even recommend replacing these bearings every 50,000 miles! Bentley, I
think... BTW, 20w50 will raise oil pressure values, but not too
significantly after the car becomes completely warm.
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Valve adjustments can be done via the addition rule. That is:
number of valves + 1.
So a four cylinder would look like this
Valve fully Valve to
Compressed Adjust Value of Compressed + Adjust
8 1 9
6 3 9
4 5 9
7 2 9
1 8 9
3 6 9
5 4 9
2 7 9
A TR6 would look like...
8 5 13
6 7 13
etc...
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A friend from back east had his bonnet release cable break. The list
suggested removing the glove box, and you could access the release
mechanism through a hole in the firewall. He did just that. I've
never done it, so I don't have any details other than that.
Good luck!
-Scotty
'75 TR6
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