Air Pipe from the Exhaust to Airfilter

kiwi · Post by **kiwi** » Fri Jun 05, 2009 9:03 am

Anyone have any suggestions of what to replace that with?

Only ones I can find locally are to narrow or to short.

You kind of know you need one when its been cold for a while (like single digits and frosts) and on a short trip the car refuses to start because of a moisture build up and ice in the carb.

A rough Guide on a price would be appreciated as I know I can double that for NZ.

velosolex50 · Post by **velosolex50** » Fri Jun 05, 2009 6:57 pm

How about cutting up some beer cans & taping them together? Doesn't have to be airtight, & could be fun sourcing the components. Alternatively, campervan interior heaters use long airducts, maybe a source there. OE pipes are expensive here too, (£20+) and hard to find. Recently they have started selling helically twisted sheet aluminium pipes which are easily damaged& a pain in the neck, I think the paper finished ones are much better. A hot air intake will transform the cold running. Good luck!
Huw

Post by **mat_fenwick** » Fri Jun 05, 2009 9:01 pm

Sorry to be pedantic here, but I can't see how taking the hot air duct from the exhaust will help starting...you may have another underlying problem that needs sorting to get it to start easily.
Best of luck!

kiwi · Post by **kiwi** » Sat Jun 06, 2009 5:26 am

mat_fenwick wrote:Sorry to be pedantic here, but I can't see how taking the hot air duct from the exhaust will help starting...you may have another underlying problem that needs sorting to get it to start easily.
Best of luck!

Yea you are being pedantic here! Its a BX Petrol and it dont like the cold neither does the other BX

Its a one off problem that has been encountered before back in the UK hence why I know about icing in the carbie. I would like to avoid a similer problem in the next couple of months especially with heading up the mountain.

Simple really the function of that Hot air duct is to direct a warm air flow off the exhaust and in to the carb providing better more efficant fuel burning and less time for the auto choke to be on.

The trip I went on the Auto Choke was still engaged which probably flooded the Carb and was not far enough to generate any engine heat. As your aware the exhaust gets warmer quicker.

Like I said this car hates Cold starts more than the other BX so having that Hot air duct missing is not exactly helping.
I just would like to know of an alternative setup to help with this particular problem.

Thank you velosolex50 for your suggestion, you gave me an idea with Redbull cans

DavidRutherford · Post by **DavidRutherford** » Sat Jun 06, 2009 8:07 am

Actually, I don't think Matt is being pedantic at all.

A hot air feed to the carb will help cold and warm-up running, but it will do both halves of absolutely nothing to assist cold starting.

If you've an issue with cold starting, then something else is amiss. Most likely either the choke settings in the carb, or possibly the ignition timing.

Also, just to be additionally pedantic, Carb ice doesn't occur when it's cold.. The most likely time for carb ice is when it's a bit warmer, but very high humidity. More information available here.

kiwi · Post by **kiwi** » Sat Jun 06, 2009 9:06 am

Aghhh

Guys I know there is a slight misadjustment with this carb and it fires first time when its warm no problem. The problem of it being difficult to start after a short drive on a cold day was as far as I am concerned a ONE OFF!

When I noticed the Hot Air Pipe was dangling in the engine bay thats when I wanted to sort out something that Obviously has a use in colder climatic conditions.

Dont hurt to ask the question on whose figured a replacement to something that serves a purpose.

kiwi · Post by **kiwi** » Sat Jun 06, 2009 9:14 am

Actually this reminds me of the poster who asked how to change a Lightbulb.

Hows it go

http://www.blakjak.demon.co.uk/lite_b.htm

citronut · Post by **citronut** » Sat Jun 06, 2009 9:16 am

i agree with both Mat and Dave on this as the carb iceing up is due to the fuel vapour freezing at the jets, and this will only acure once the engine is running, i know as i had this years ago on a GS estate, but i do agree this is down to the hot air ducting missing as that is why my G came to a hault eventually

i have bought some universal aloy ducting from the local accesary shop before for one of my customers A reg MK1 BX 1.9 TRS, it dose the job even though it is very thin compaired to the OE equivalent

regards malcolm

LiverMatt · Post by **LiverMatt** » Sat Jun 06, 2009 10:39 am

2CV Heater Pipe?

citronut · Post by **citronut** » Sat Jun 06, 2009 11:14 am

Mathew wrote
"2CV Heater Pipe?"

Kiwi is asking about the pipe/duct which goes from the exhaust manifold to the air intake, this is a lot smaller diamiter and corigated alliminium, not like the foam lined cardboard dersh duct

regards malcolm

mountainmanUK · Post by **mountainmanUK** » Sat Jun 06, 2009 2:08 pm

Worth trying a call to any local Air Conditioning firms......as they quite often have offcuts lying around, of ducting in different shapes and sizes.