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Beetle juddering? :(

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clementine70 Learner Dubber

9 posts · joined Jan 2011 ·

#847960
Hey

wondering if anyone can give me a heads up.
my dad went out in the 1970 beetle tonight and it juddered the whole way? it has been doing it early in the morning and i have just been putting it down to the cold letting it run for a couple of minutes and its fine. second gear is being difficult sort of crunching down and there is an oil leak are they connected?

can someone help me out with some advice and prices to fix it?

Thanks

Emma

Aussie Dubbin Fahrvergnugen

895 posts · joined Jul 2008 ·

#847969
I'm pretty sure there is no syncro on first gear so the chrunching may need i softer apporach. Is it all fixed when it is warm? Heat risers perhaps... does it happen al the time?
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clementine70 Learner Dubber

9 posts · joined Jan 2011 ·

#847975
not all the time no. it was fine when i drove it earlier today then my dad went to pick my brother up and it wouldnt stop juddering, it usually stops after a little while

:S

helbus Administrator Mad fabricator, paint and body

7,386 posts · joined Sep 2002 ·

#847976
1st gear has a synchro. Second gear crunching down is not uncommon for a 40 year old box. Be a bit delicate, and it will be fine. I pre rev our Beetle when shifting down to give the sychro a help.

Juddering may be a fuel tune or ignition problem. A clean of the jets in the carby, and a new set of plugs and points, and most problems are eliminated.
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4,980 posts · joined Dec 2003 ·

#847978
most likely the manifold icing up,and sometimes the gear crashing can be just a little adjustment of the gearstick,was told this when it happened to my 61 beetle
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68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#847990
clementine70 wrote:Hey

wondering if anyone can give me a heads up.
my dad went out in the 1970 beetle tonight and it juddered the whole way? it has been doing it early in the morning and i have just been putting it down to the cold letting it run for a couple of minutes and its fine. second gear is being difficult sort of crunching down and there is an oil leak are they connected?

can someone help me out with some advice and prices to fix it?

Thanks

Emma

Hi Emma..

2nd gear can always be a bit crunchy after all these years..
Your clutch may need a slight adjustment..
1/2 a turn of the wing nut...

Most VW engines leak Oil.... I clean My engine very often..
and sometimes there are No leaks.... great..
next time I go on a trip... leaks...
so, its a common thing..

not really a problem unless its a lot of oil..

best to place a piece of cardboard or something to catch the drips and tell You whether its a BIG leak...
which is also common with the tappet covers on either side of the engine..
many people have these leaking...

when driving Your car... and it starts juddering.. shuddering..
feel under the carburetor, to see if its icy cold..
if it is...
Your preheater pipe is blocked and will need renewing
this will most probably only happen when its cold... outside..

cheers

Lee


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- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

t_tuffnut Wolfsburg Wizard

425 posts · joined Jun 2009 ·

#848191
Yeah, preheat pipe is blocked. It gets clogged up with carbon and crap from your exhaust. Mine is blocked at the moment and the bug carries on in the mornings, so I just cruise around in third for a few blocks and then its all good.

I heard that an old school quick fix was to wrap the carb manifold, just underneath the carb, tightly in a gauze or thick cloth as ice found it harder to form on material.

I'd be a bit concerned about it trapping fuel and potentially turning into a molotov cocktail.
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68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#848211
Hi Emma,

The preheater pipe is required in colder weather where it may not be needed in the HOT summer..
it heats the manifold up where the very cold petrol is sprayed and stops the carburetor from icing up...
and it can stop Your engine...

it did mine 3 years ago, when travelling down the putty road to sydney and the temperature dropped to zero degrees...

I taped up all mY air vents on the engine cover and below the rear window.... to stop the freezing up and keep the engine heat in the engine bay...

I did use an electric blanket heater around the manifold until I replaced the manifold and hear risers.. it came from the US..

LEE

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#848222
They're needed even in hot weather.
When you turn a liquid into a vapour it's going to refrigerate that's just science.
It's just not as pronounced when it's hotter.

I had an electric heater on my old single Weber carb which is now on dads engine and even in summer if I turned it off I could notice around town it wasn't as happy pulling from low revs

THe most noticeable difference without them though it to fuel economy.

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#848292
When Mine freezed up going to Sydney Joel
I used twice as much petrol as I should have... YIKES...
My heat riser had rusted out on the front side, [front of car] where I couldn;t see it.... lol

cheers

LEE
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

clementine70 Learner Dubber

9 posts · joined Jan 2011 ·

#848316
ok thanks guys. any suggestions for a quick fix as pennies are low and was relying on tax money to do a big service and to fix her up. or anyone keen to give me and my dad a hand? we are on the north side of brisbane and dad has two beetles for spare parts if need be?

thanks

p.s. im stuck without a car until this is fixed