Ignition/fuel/engine problem

abba Slammed & Awesome Dubber

75 posts · joined Jun 2009 · 24 Dec 2011, 1:45 am

#878318

Hi Guys
Need some advice
I have just noticed after taking my Buggy out for a drive that only one side of the engine gets hot . #3, #4 side. I have a dual exhaust set up and only the one on the #3,#4 side gets hot as well. This side also sounds a little louder and is more consistent in rhythm. The other side sounds more irregular and pops under deceleration sometimes. The performance seems normal and drove ok. If I didnt notice the cold exhaust I wouldnt have thought there was a problem. Just worried that there is internal damage. I have a 1916 with dual Kads. I tried different spark plugs and leads. checked fuel was going to both carbs. All good. I thought maybe a blocked jet so I took the air cleaner off the cold side dripped extra fuel in the carb and it back fired. Any thoughts ??

jamiesc Wolfsburg Wizard

559 posts · joined Dec 2010 · 24 Dec 2011, 5:22 am

#878323

did it backfire befor it happened? the popping on deceleration could be your muffler flange there only like $12 ive had the same problem with my 1800 tp

With your performance not being normal do it feel like the engine is overloading it self like when you get to the certain revs when it gets up and goes it doesnt feel like it wants to this could be cause from the tappets being too tight

hope this help and merry Christmas
cheers jamie

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

11,654 posts · joined Aug 2002 · 24 Dec 2011, 6:49 am

#878328

odd one that..??

Your 1 & 2 cylinders and heads colder than then 3&4 ??

have You checked the tappets?? on 3 & 4?

either leaking [too tight] or hardly opening [too loose]

Lee

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

abba Slammed & Awesome Dubber

75 posts · joined Jun 2009 · 24 Dec 2011, 11:45 am

#878351

68AutoBug wrote:odd one that..??

Your 1 & 2 cylinders and heads colder than then 3&4 ??

have You checked the tappets?? on 3 & 4?

either leaking [too tight] or hardly opening [too loose]

Lee

Ok will check both sides. When I say colder I mean I can hold the exhaust pipe after 5 min of running. And the air coming out is warm at best. There is little radiant heat when I touch tappet cover. I dont think any fuel is igniting on that side to cause any heat. will the tappet adjustment correct this ? I spose we will see. Thanks for the advise guys.