674 replies to this topic

[N/A-PWR]

compression test it now Jacob, even if you take all the spark plugs out, and use your fingers in the spark plug holes, they all should excert pressure when turning over

[madtoranajzedded]

can you turn here over  jacob and get tdc and check timing marker,just to exclude timing?

 

then check to see where dizzy is at same time,just my thought

Edited by madtoranajzedded, 14 February 2014 - 09:42 PM.

[N/A-PWR]

a, blown gasket between cylinders, should suck your finger a bit in the side by side cylinders - try 5 and 6

[Rockoz]

I was thinking along the lines now of rocker/valvetrain problem.

The bang is what concerns me.

But certainly pull the rocker cover off and check tdc with cam timing as well as obvious part misplacement in the valve train

[N/A-PWR]

you can do a head gasket without breaking into the water jacket Jacob, I say that is a compression break, not a water burst. Dave I

 

p.s. I can show you a few Compression break Head gaskets, when I take a Photo of them

[Rockoz]

Forget about the harmonic balancer.

Apart from indicating timing it wont affect it. Unless it spun and you adjusted the timing after.

Sounds like its backfiring through the carbs. The clip isnt really long enough.

Get it running with assistance if required, and pull leads off one by one, listen for changes then replace lead.

Having them slightly loose before you start will help.

A head gasket problem will show itself by little or no change to idle when you pull the lead to affected cylinders.

If there is change when only one lead is pulled its likely the problem is that cylinder only and could be valve train related on that cylinder.

If there is difference between all cylinders when the leads are pulled I would think it is overall timing and gears the likely culprits.

Its a quick check to do first up without removing anything apart from leads.

[S pack]

Grab the distributor body and see if you can turn it, also remove the dizzy cap and check the rotor button is correctly engaged into the end of the shaft. People have been known adjust the timing then forget to lock up the dizzy clamp.

[Potta]

Yeah it sounds very similar to what my car was doing and it was incorrect timing that was the culprit, sounds like your dizzy may have slipped/broken.

Edited by Potta, 15 February 2014 - 12:33 AM.

[N/A-PWR]

another thing, is a cracked or faulty spark plug

[Rockoz]

Need to start looking.

For ease try this.

 

1. Check dizzy for tightness. Has it moved?

2. Check rotor button. Can you turn it on shaft?  Remove and check lug in hole.

3. Spin crank to bring timing mark up. Is rotor pointing to roughly 1 or 6?

4. Pull No 1 plug and bring piston up to tdc

5. Pull rocker cover and check valves on 1 and 6

 

These can be done in an order of types

[S pack]

Turn your engine over one full turn until the timing mark on the balancer lines up with the mark on the cover. Now set your dizzy so the mark on the rotor button lines up wit the mark on the edge of the dizzy body. If the timing mark on your balancer is correct then your dizzy will now be firing No.1 at TDC. Tighten the dizzy clamp and try firing up the engine.

 

Edit: Pull the rotor button off and check the lug of plastic inside where it sits on the shaft. 1/4 turn of freeplay in the dizzy shaft is way too much. Maybe something inside the dizzy has failed.

Edited by S pack, 15 February 2014 - 05:02 PM.

[Rockoz]

Will get a little play in the dizzy thats the advance mechanism.

Oil from the coil would not be good.

Will have to put timing light on it for sure.

[Potta]

It'll fire at the wrong time and if it is broken it'll fire randomly so you'll get all the symptoms you've been getting.

 

The timing will be totally out.

[Potta]

Yeah agreed Bomber it definitely sounds like something has let go somewhere that is screwing up the timing.