Check for fuel, Compression and Timing
Quote:
Originally Posted by
mtisafish
Help hi l've just rebuilt my 300 tdi, new cank cam block honed new pistons cam followers injector pump fixed turbo all new hoses new clutch injectors glow plugs got motor and box back in everything hooked up timing has been done checked and checked all its doing is turning over and over just won't fire help any advice please
First crack the injector pipe joint on number 1 injector to make sure there is fuel reaching that injector when cranking the engine over.
Then after making sure that the number one injector is injecting fuel, check to see if it is timed to coincide with the number one cylinder having compression, as it maybe 180° out in the timing and injecting as the two valves in that No 1 cylinder are opening and closing instead.
To check the timing, take the number one cylinder glow plug out, this is to tell when the number one cylinder is at Top Dead Centre ( TDC ) and at it's compression stroke. Mark the harmonic balancer with a spot of white paint when No 1 Cylinder is at TDC and you can do this precisely with a piece of wire down the hole that the glow plug has come out of, then by rocking the crankshaft slightly back and forth, the wire will raise to it's highest at TDC, at this point you should be able to then fit the timing pin through the flywheel housing into the flywheel notch, but leave it out for this exercise.
By cracking the joint on No 1 injector, you will then be able to see when the engine is injecting fuel inrespect to the white mark on the crankshaft.
If you are unsure of the valve timing take the rocker cover off and look at the rear two rockers, at TDC on number 1 cylinder they should be at a point of one finishing closing as the other begins to open - Number 4 cylinder valves should be rocking in other words.
You can start and run those engines briefly without either of the manifolds being connected.