Aussieveedubbers · Tech Talk

Inlet manifold

https://forums.aussieveedubbers.com/threads/75455/inlet-manifold

Sometimeman ·

Hi again, Just a quick question re dual port inlet manifold having lots of tiny holes in the preheat tubes...........Does one buy a new one or is there a quick, cheap easy fix....I am disinclined to just blank them off as the previous owner did....
Cheers Ian

RISKYBUG ·

yeah if you live in a hot place it should be fine
if its old it wont be working anyways
other wise buy a new manifold about 100 bux

greedy53 ·

yea what he said

OZ Towdster ·

If your in Brisbane we have some good second hand ones available at Custom Vee Dub $30

Sometimeman ·

Thankyou gentle men. I will chat to my mechanic and make choice.
Thanks Ian

68AutoBug ·

Sometimeman wrote:Hi again, Just a quick question re dual port inlet manifold having lots of tiny holes in the preheat tubes...........Does one buy a new one or is there a quick, cheap easy fix....I am disinclined to just blank them off as the previous owner did....
Cheers Ian
No Easy Fix...
You need to buy a Good used one...
Especially if you live in a Cold area [in Winter]
You don't say Your Location...??

If it does get cold in Your location, the carburetor can freeze solid... and then the engine can stop...

I had this problem last winter...

When the carburetor is too cold.. it will use heaps of Fuel too...

cheers

LEE

Joel ·

even in hot climates no preheat will still have condensation problems it just wont be as bad

its just a natural side effect due to the change of state from a liquid to vapour you get a refrigeration effect

i had a single weber years ago with an electric heater on it as the preheat had rotted off which worked really well
but even in summer if i switched it off the difference in economy and drivability was very noticable around town
highway running wasnt as bad

Sometimeman ·

Hi guys. I guess Gippsland in winter van be a little cool sometimes. I am inclined to agree with the need for the preheaters to work anyway as often ice will form on the carby even on mild days.. I am much inclined at this stage to get a brand new manifold considering the effort I am putting into this motor.
Cheers Ian

geodon ·

It's not just the pre-heat tube.

Make sure your carb also has a hot air hose from the exhaust/heat-exchangers going into the air cleaner.

If you buy 2nd hand, make sure you blow thru the pre-heat pipe- they commonly block with soot & are a bitch to clean. If you CAN blow thru it, block one end with a hand & check it seals off. I put a 2nd hand one on (admittedly a decade ago!) & couldn't get an idle. The manifold had rusted thru into the pre-heat pipe. GEEEZ! It took me ages to work that one out!

Sometimeman ·

Thanks very much for that tip Geodon.....I am sure I would not have thought of that.....I had a similar problem with the pre heat tubes on a Haflinger ages ago but it was easy to make new tubes as they just sat under the manifold.

Cheers Ian

geodon ·

A HAFLINGER!!!

Oh My God & Tin Fish!!

As a pimply youth on my way home from courting, I used to walk from the Armadale station along High St to Glen Iris
as I was too late for the last tram..

I would pause for a long while & look in the Haflinger shop window & ponder how anything so archiac could actually run.