i am the new owner of a 1972 gt6 that i am restoring. if someone could help
with these questions i would be greatly appreciated.
1. the vacuum lines for distributor etc are all messed up. first there is no
vacuum line on the distributor (lucas). also there are no vacuum lines on the
thermostatic vacuum switch on top of the radiator. how are they supposed to
be hooked up ? i have a haynes workshop manual but they do not show how the
lines go.
2. continuing that question. someone has taken the vacuum line coming from
the bottom of the rear carburetor and attached it to some small device that is
mounted next to the radiator. i do not know what this thing is but i know it
is not original or factory. it has two wires on it as well as this vacuum
line. one wire goes to the oil pressure sending unit (which has 3 wires on
it) and the other i traced to a brown wire with a red stripe on the ignition
switch. really ! the device is round, approximately 3 inches long, 1 inch in
diameter and has a plastic plunger on the bottom. it appears that as the
vacuum increases and decreases this plunger moves in the housing which then
activates an electrical switch that is connected the ignition and oil pressure
sender. does anyone have any clue what the heck this thing is and what it is
doing ??? what is recommended ? should i disconnect and remove this thing
and just run the vacuum hose to the distributor ? i am amazed that the car
ran so well with no vacuum line on the distributor. yes i drove it before i
brought it home and took it apart...
3. oil pressure sending unit. the book shows only one lead coming from it and
going to the idiot line on the dashboard. but this unit has 3 wires on it.
any clues as to why and what ???
4. i did a compression test on all cylinders. the book says 130-145lbs. but
mine read 200 lbs on all cylinders. i took the compression tester and tested
my neighbors tr6 to check the tool and his cylinders were all between 130-145
lbs. so the tester is fine and my method is fine. does someone have an
opinion on this ??? i am suspecting that someone 'hopped up' the engine in
the past by having high compression pistons installed and possibly milling the
deck height on the cylinder head. i am very concerned that this is too much
pressure.
5. i wanted to adjust the valve clearances (or at least check them). the
procedure in the book seemed really bizarre to me. it started with make sure
valves 1 and 3 are closed and then adjust valves 5 and 8. huh ??? no
picture to show which valves are which so i am assuming (correctly ????) that
they just start at 1 and count up from the front of the engine back. also how
do i know when those valves are supposed to be fully open ? i thought that i
should get the engine on tdc with the timing wheel, make sure the piston 1 is
at the top and that the rotor is pointing at plug 1. does someone have a good
procedure for doing this ? and worse yet, the book says to see the spec on
the clearance (.007 ????) but i did not find the spec anywhere in the book.
does someone know what the clearance are ? are they the same for intake and
exhaust ? i guess i should ask if there is reference material for all these
questions on the web. is there ? or can someone recommend a better workshop
manual ?
thank you all for letting me submit this long list of questions. i am new to
this but you can see my desire to restore this triumph and make it right. i
appreciate all feedback greatly !
you can see the car (i will submit progress reports) at
http://cs.uccs.edu/~lstein/personal/gt6.html
larry stein
lstein@ehc.org
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