Just Done My Timing, Now Car Won't Start!.

[r33turb]

Hey guys, i just done my timing belt, and now my car wont start, it feels like it wants to but it doesnt....i think ive done something wrong....

From the start:

Mark cas, and removed, removed top cover

Pulled belt off from the 2 cams at the top

pulled out radioator and fan

removed all belts getting to the timing belt (alternator, p/w, ac)

chucked gtr in 4th,pumped brakes and got m8 to loosen up the harmonic balancer 30mm bolt

removed 30mm bolt, then removed the balancer

removed bottom cover to see timing gear and bottom timing mark

removed belt

Aligned all my 3 timing marks by turning the crank, and the cams individually - so that each tooth dot was aligned with my marks on the back

placed new belt back on + tensioned accordingly (all lines were perfect with their markings when belt was placed on)

Placed balancer back on, and noticed it wasnt aligned with its bottom cover marking (the timing gear, and 2 cams marking where all correct before placing the balancer back on ...

Rotated crank clockwise several times until the balancer mark and my cam timing marks were correct (at this stage there was no way to tell if my timing gear mark was right on).

placed everything back on, including cas (during this time the cas was dropped)....aligned cas

Cranked engine, engine feels like it wants to turn over, and it nearly did, but it didnt.

Stopped immediately and pondering what to do!?

One thing, i feel one of my marks is maybe a mm out or so, would this be all it takes?

Edited January 26, 2008 by r33turb

[r33turb]

Just a word:

Upon reading couple of guides theres two different approaches.

One seems to be to line up the bottom timing with the balancer and the mark at 2pm on the bottom cover?

another i read said to removed the balancer and bottom cover and line up the timing with the mark at 5pm and then put on new belt, and place the balancer back on (no mention of making sure the balancer timing marks with the 2pm mark on the rear cover though as the other guide suggest).

[Simon-S14]

the balancer needs to come off, on the crank cam there is a dot at the 5pm position, the mark on the T belt needs to line up with this along with the two marks for the cam poisitions.

once this is lined up, turn the motor over by hand then tension it up.

with the crank cam dot in the 5pm position, the Keyway on the crank will be right at the top and therefore the balancer markings should line up with the right mark on the cover.

hope this helps.

[Al]

Just read your other thread: Have you replaced your cas or tested it on another car?

The drop could have farked it. If the cas is farked, the engine will crank, like normal, but will not fire up.

[r33turb]

Hey, thats the wierd thing, i lined up the crank cam dot at 5pm - all good, then when placing the balancer back on - it was way off the timing marks on the cover(nearly opposite), why would this happen???, anyway, once the balancer was on, i put the car in neutral and rotated the crank until the balancer timing was lined up to the cover mark (took alot of revolutions to do this though)....would this be doing the same thing, or screw up my timing?....

im curious to know why once my balancer was on that the marks didnt line up to the cover, whilst everything else did....

Is it safe to assume when all 3 timing marks are aligned (when balancer is removed), the keyway should be facing up?....ill have to look into this tommorow.

[OFENSV]

i would of lined the timing marks up first before taking the belt off instead of taking the belt off and turning all individualy, its possible to bend a valve turning the crank with out the cams turning. The keyway should be facing up when on tdc

[Simon-S14]

you wont bend the valves turning the crank by hand.

if the CAS is f**ked you would have no spark or injector pulse...

best way to test is with an LED test light and pull off an injector plug, crankl ti over and if it isnt pulsing (one wire will be 12V supply and the other will be a pulse signal from the ECU) then the CAS isnt working to provide a signal to the ECU

[r33turb]

Thanks, what type of cas sensor could i use with my rb26dett engine from an r33 gtr 95 model?, i was told r33 gtst sensors also work?

[blind_elk]

One of the things I mentioned in your other thread is that there is a matching half-moon key, for the CAS, on the end of the exhaust cam. Is that still there?

If you line up the markings on the crank gear and the markings on the cam wheels with their corresponding reference marks, the crank pulley has to line up correctly. You may have the wrong pulley, or the woodruff keys that force the pulley to align correctly, are MIA.

It should only take 2 revolutions of the crank before all the marks (on the crank and on the cam wheels) are aligned with their reference marks.

[r33turb]

Hey, my cam gears and crank gear timing was spot on, and when i placed the belt on it was no different, so the timing there is perfect, only thing that wasnt, was the crank pulley timing(ignition timing).

yes there a half moon in the exhaust cam and cas sensor to key into.