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So I figured out why my '89 740T was no longer sparking and tach not moving.
I replaced the hall effect connector insulator on the distrubutor since it was a crumbly mess and verified it all works by spinning the distrubutor shaft and observing spark from the HT lead to chassis. Fuel pump also runs when I do that so Hall effect, ECU, power stage, FP rellay and coil are all good.
Took the oil cap off to see the posistion of Cylinder 1 valves to verify I was putting the distributor rotor in, and noticed that the cam does not turn with the rest of the engine.
The belt tensioner had frozen, cooking the timing belt, and eventually slipped off the secondary gear. Which means the Nimrods who changed the belt didnt bother to think about the tensioner.
So now I'm trying to figure out how bad it is. the last time the car ran, it was turned off, and didnt start again, so I'm wondering if the belt slipped off during the starting attempt.
I was under the impression that the pistons would slam into and mangle the valves if they where stuck open, however, there was not the gawdafull sound that I would associate with the pistons and valves getting up close an personal, and the engine appears to have compression when I turn it.
Also no clunks or grinds when turing the cam.
I took the intake manafold off and turned the crank, all 4 of those valves look OK from the top, with no mettal bits stuck to them.
Next step is to line up the timing marks and put the crusty old belt back on and do a compression test.
Any know if this is whishfull thinking or the the b230FT w/o the timing belt will mangle the valves?
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'70 145, Webber converson, pretty much stock other than that. & 89 740Turbo Sedan
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