well, not just yesterday....but for the last few weeks......
bloody 159 blotted its' copybook on the sunday morning of ades' rally back in early December as some may remember, cambelt tensioner spring broke giving much slack to the belt itself with inevitable consequences
simple enough, it should have been. take cam housing off, replace damaged rocker arms, check for cylinder compression leakage through injector ports, new belt kit and start it up....na, not today thank you. that was a few weeks ago...
as it wasn't gonna be a simple fix I bought a cheap local 147 that turned up to save the rush to keep mobile, seems that owning 8 cars doesn't guarantee any of them being useful enough to get to work in!
left it alone for a week or so to let it sulk, teach it who was boss etc
a chance encounter with a Vauxhall specialist in Lincoln where I bought a bonnet fro the imp and talking about the cars woes and the error code for swirl flaps and he suggested that it could well be why it isn't starting still, so off with the inlet manifold....now, as easy as that sounds it's anything but! to get the manifold off requires the high pressure fuel pump to come off, the manifold studs sit behind the pump, of course to take the pump off requires the cambelt off again...which means engine mounts off again....
so the manifold finally comes off and the swirl flaps are just about visible through the gunk, well 3 of them...1 has long since departed, presumably gorged by the engine some time back by the looks of the build up of crud on the bare spindle!
it was a wonder the car ran as well as it did before, let alone ran at all. the inlet ports which should of course be a couple of inches diameter you'd have struggled to get your little finger in, manifold internals much the same, MAP sensor buried under inches of gunk, god knows what it was reading!
an inch or so of crud got craped out before it all went in the parts cleaning tank...
swirl flaps removed for good measure and all built back up...still no starting
a chat with Tom about possibilities, cam and crank sensor i'd thought about and seemed a likely culprit so I ordered both sensors.
as a final check to make sure I wasn't missing anything I checked the cam timing again. now, as those who've done jtd engine belts will know there is only a pulley on the exhaust cam and the inlet cam is driven by a pair of gears at the opposite end inside the cam housing. i'd checked and double checked the cam timing, even resorting to buying the proper alignment tools and of course all was well. however i'd not checked the
inlet cam as being on a pair of gears they must surely be ok? the timing pin wouldn't go into the locater in the inlet cam! not the easiest thing to access either, but it wasn't in line. actually took a further 7 teeth forwards rotation of the cambelt before the mark lines up....at last!
so off with the cam housing again, getting the hang of it by now, and the checks made again. sure enough the inlet cam was out of alignment by about 45 degrees!!
picture here shows the gears inside the cam housing
but how had they moved, jumped teeth? surely they will be on a keyway.....nope! flat faced mating up against the end of the camshafts, not even on a taper let alone any dowel or keyway! gears removed, lock cams in posisiiotn then torque back up.
refit everything and once fuel pressure restored it purred into life
thank you!!!
so, nearly a month after giving up on me it was going again.
celebrated with giving it a wash