Stage 1 V8

Hi All,
Wondering if anyone has any idea why the dampers/pistons on both carbs(factory zeniths) will not lift ?
I have checked diaphrams, look fine.
While running, if i manually open the dampers, with a screwdriver, it roars into life and sounds great as it should, so they are not stuck..
Engine will start, and run, but is only getting air in through the breather ports that are normally plumbed into the rocker covers.. if they are connected to rockercover, engine doesnt get enough air and dies.
It will drive at upto 65kmh but is obviously very restricted..
It was running fine previously, then after afew months of being parked, it was hard to start. Replaced the batteries, checked plugs, leads ect. Now have it started again, but running like a sack, and find no lifting action in both carbs!?
Cheers for any help..

Carbon/tar build up above and around the piston, something literally causing the piston to stick.

Otherwise, you've managed to block one of the air ports that allows this piston to rise. Frequently done when the air cleaner inlets are removed and the gaskets are moved or replaced. You can also check the diaphragm but these are rarely the issue they are presented to be.


https://zparts.com/index.php/resources/ ... explained/

That's a really useful link.

Yeah, thankyou muchly map1275 , will get amongst it tomorrow, and be checking all you mentioned.
That website is also exactly what i needed.
Hope to be running by the weekend now.. will post progress..

'AA book of the car' has a better and simpler explanation. Not in print but still readily available.

Would that be in Australia?

Disassembled the carbs again, cleaned the shig outta em, replaced both diaphrams while i was there.. Success!!
Its running like a absolute beast now, better than ever i reckon.
Thanks very much guys.. so happy to be Land'ing again, with power now!

Good to hear

You on the NZ Ex Army V8 FB page? If not, you should register your vehicle with Alex.