Carburrettors - faults and faultfinding - Revision history

Dugcati: Carb Settin

2011-05-01T11:26:10Z

Carb Settin

← Older revision		Revision as of 11:26, 1 May 2011
Line 12:		Line 12:
	You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs. It is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minute epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed otherwise this will cause a very weak mixture and risk of overheating.		You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs. It is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minute epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed otherwise this will cause a very weak mixture and risk of overheating.

	~~'''Dud:''' Many thanks Steve, that's a great help. Better not drive it too far then, even though its unplugged, until I fix it.~~

	'''~~Anon~~:''' ~~No, long runs running weak~~ will ~~do it no good~~ at ~~all~~!		----

			'''Base settings for the 32-34PDSIT carb on 2.0L CU engines:'''

			Base settings for the 32-34PDSIT Carb:-
			3 .5 turns out from home on the air and mixture screws as a base setting and you will not be far out. The all important throttle base gap of 0.1mm then balanced to a throughput of 8.5 cu/in measured at tickover on a carb balancer. Thanks to Steve8090 for this information!

HarryMann at 12:54, 3 March 2009

2009-03-03T12:54:32Z

← Older revision		Revision as of 12:54, 3 March 2009
Line 13:		Line 13:

	'''Dud:''' Many thanks Steve, that's a great help. Better not drive it too far then, even though its unplugged, until I fix it.		'''Dud:''' Many thanks Steve, that's a great help. Better not drive it too far then, even though its unplugged, until I fix it.

			'''Anon:''' No, long runs running weak will do it no good at all!

HarryMann at 12:53, 3 March 2009

2009-03-03T12:53:46Z

← Older revision		Revision as of 12:53, 3 March 2009
Line 11:		Line 11:

	You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs. It is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minute epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed otherwise this will cause a very weak mixture and risk of overheating.		You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs. It is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minute epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed otherwise this will cause a very weak mixture and risk of overheating.

			'''Dud:''' Many thanks Steve, that's a great help. Better not drive it too far then, even though its unplugged, until I fix it.

HarryMann at 12:52, 3 March 2009

2009-03-03T12:52:58Z

← Older revision		Revision as of 12:52, 3 March 2009
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	'''Dud:''' ~~Wiki'ed by Mocki~~		'''Dud:''' I have a 2l Aircooled with what seems like a carburrettor problem.

	~~I have a 2l Aircooled, and~~ a little machined hole (which could possibly have had something fall ~~off~~?) behind the bypass idle cut off valve on the left carb has just started making a very loud air sucking noise (audible in the cab with the window shut). When I put my finger over it at tickover it raises the rev's slightly.		There is a little machined hole (which could possibly have had something fall out?) behind the bypass idle cut off valve on the left carb which has just started making a very loud air sucking noise (audible in the cab with the window shut). When I put my finger over it at tickover it raises the rev's slightly.

	I have just disconected the bypass idle cut-off valve by pulling out the power lead on the left of it. This has drastically reduced the sucking noise. From what I understand the point of this valve is really to stop the engine running or causing backfire once the ignition has been turned off, a problem on the Aircooled's due to hot spots. Is this correct? I am also keen to know if in temporarily disconnecting it there will not be any major issues other than those mentioned above, or other damage as a result of me disconnecting it?		I have just disconected the bypass idle cut-off valve by pulling out the power lead on the left of it. This has drastically reduced the sucking noise. From what I understand the point of this valve is really to stop the engine running or causing backfire once the ignition has been turned off, a problem on the Aircooled's due to hot spots. Is this correct? I am also keen to know if in temporarily disconnecting it there will not be any major issues other than those mentioned above, or other damage as a result of me disconnecting it?

HarryMann at 12:50, 3 March 2009

2009-03-03T12:50:48Z

← Older revision		Revision as of 12:50, 3 March 2009
Line 1:		Line 1:
			'''Dud:''' Wiki'ed by Mocki

	'~~''by Dud »''' ''Wiki'd by mocki''~~		I have a 2l Aircooled, and a little machined hole (which could possibly have had something fall off?) behind the bypass idle cut off valve on the left carb has just started making a very loud air sucking noise (audible in the cab with the window shut). When I put my finger over it at tickover it raises the rev's slightly.

	I have a 2l Aircooled, and a little machined hole (which could possibly have had something fall off?????) behind the bypass idle cut off valve on the left carb has just started making a very load air sucking noise (audiable in the cab with the window shut). When I put my finger over it at tickover it raises the rev's slightly.		I have just disconected the bypass idle cut-off valve by pulling out the power lead on the left of it. This has drastically reduced the sucking noise. From what I understand the point of this valve is really to stop the engine running or causing backfire once the ignition has been turned off, a problem on the Aircooled's due to hot spots. Is this correct? I am also keen to know if in temporarily disconnecting it there will not be any major issues other than those mentioned above, or other damage as a result of me disconnecting it?

	I have just disconected the bypass idle cut off valve by pulling out the power lead on the left of it. This has drastically reduced ~~the sucking and therefore~~ the sucking noise. From what I understand the point in this valve is really to stop the engine running or causing backfire once the ignition has been turned off, a problem on the Aircooled's due to hot spots. Is this correct~~????~~? I am also keen to know if in temporarily disconnecting it there will not be any major issues other than those mentioned above, or other damage as a result of me disconnecting it? ~~(I'm planning to go away in it on monday for a week).~~

	Secondly, does anybody have any idea why it has suddenly started making this sound? Could the valve be faulty? Could something have fallen off that was covering the hole making the noise (I did find a paper hole punch shape and sized bit of metal nearby in the engine bay)?		Secondly, does anybody have any idea why it has suddenly started making this sound? Could the valve be faulty? Could something have fallen off that was covering the hole making the noise (I did find a paper hole punch shape and sized bit of metal nearby in the engine bay)?

	~~Many thanks for any replies.(82 Aircooled Autosleeper)~~
	~~Dud~~

	~~Posts: 94~~
	~~Joined: 17th, Dec 2005~~
	~~Location: Portsmouth Member No. 2029~~
	~~80-90 Mem No: 2029~~

	~~'''Reply by Steve8090'''~~

	You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs, it is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minitue epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed as this missing will cause a very weak mixture and risk of overheating.		'''Steve8090:'''

	~~Steve Shaw~~		You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs. It is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minute epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed otherwise this will cause a very weak mixture and risk of overheating.
	~~Member No~~.2
	~~Club founder~~ and ~~owner~~ of ~~Gasure~~.UK
	~~Trader~~
	~~Posts: 574~~

Mocki at 20:11, 14 February 2009

2009-02-14T20:11:02Z

New page

'''by Dud »''' ''Wiki'd by mocki''

I have a 2l Aircooled, and a little machined hole (which could possibly have had something fall off?????) behind the bypass idle cut off valve on the left carb has just started making a very load air sucking noise (audiable in the cab with the window shut). When I put my finger over it at tickover it raises the rev's slightly.

I have just disconected the bypass idle cut off valve by pulling out the power lead on the left of it. This has drastically reduced the sucking and therefore the sucking noise. From what I understand the point in this valve is really to stop the engine running or causing backfire once the ignition has been turned off, a problem on the Aircooled's due to hot spots. Is this correct????? I am also keen to know if in temporarily disconnecting it there will not be any major issues other than those mentioned above, or other damage as a result of me disconnecting it? (I'm planning to go away in it on monday for a week).

Secondly, does anybody have any idea why it has suddenly started making this sound? Could the valve be faulty? Could something have fallen off that was covering the hole making the noise (I did find a paper hole punch shape and sized bit of metal nearby in the engine bay)?

Many thanks for any replies.(82 Aircooled Autosleeper)
Dud

Posts: 94
Joined: 17th, Dec 2005
Location: Portsmouth Member No. 2029
80-90 Mem No: 2029

'''Reply by Steve8090'''

You should have a little steel disk fitted to that hole, there are actually two of those, they are machining holes that are blanked, similar to core plugs, it is quite common for these to fall out, you will need to block this up with a similar flat disk, if you dont want to take the carb off then use some 5 minitue epoxy and glue the disk into place, other than that when you remove the carb you will see a second small disk, these are staked to place, just copy that one and make sure they are sealed as this missing will cause a very weak mixture and risk of overheating.

Steve Shaw
Member No.2
Club founder and owner of Gasure.UK
Trader
Posts: 574