one hot manifold one cold and motor won't run

[sannabay]

Please help. I've been working on my van all day and the darn thing won't run.

I fitted a different engine today with all the same bits as the old one now it won't run.
It starts revs up then dies away, tweek the throttle and id does the same again, leave it and it dies.
Also more worrying is that one head is getting very hot while the other is cool.
All ht leads are going to right place.
One odd thing is that the distributer at tdc on one ponts in toward the manifold, with the vacuum chamber facing to the back right. It worked before.

Heres hoping

Allan

 

[Dave.P]

im guessing you mean your rotor arm points to the manifold ,but didn't before? If the dissy drive is in different to your other engine and the rotor is pointing to a different place at tdc on 1 ,you may need to switch all the leads on the dissy cap around 90/180 degrees to suit like you would when you go from svda to 009.
Just a thought

 

[Happystamps]

Yeah, that may well be it. whip out the spark plug on cyl. 1, and the rocker cover on that side. with a pencil in the spark plug hole (testing intermittantly) rotate the engine by hand until the piston reaches the tippy-top of it's travel.
Then have a look underneath the rocker cover you removed, and check to see if the tappets are loose on the valve stems. If not, rotate the engine 360 degrees and look again, the position where the tappets is loose (est) is your TDC on the firing stroke.

Nowwwwww, look at the pulley. Does a notch line up with the split in the crankcase? Should do, if no-where near do the test more accurately and make a notch. next, mark another notch at your firing position, say 7.5 degrees to the right if you fire 7.5 BTDC, like most folk.

connect a 12v lamp between coil - (wire that goes to the distributor) and earth, and turn the ignition on. rotate the engine back and forth and adjust the distributor position so that the lamp turns on as the engine turns clockwise and your timing notch is in line with the split in the crankcase.

Nowwwww, look at your rotor arm and work out which spark plug lead it's going to, that goes to cylinder number 1. Look down on the fitted cap and clockwise from there, 4,3,2.