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VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

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Old July 19th, 2018, 11:51   #1
Tom in PT
Join Date: Jun 2017
Location: Twilight Zone, WA State
Fuel Economy: 41 mpg in '05 ; up to 57 in '13
Default dumb question -removing lower hose on intercooler

I have had a fouling of the air sensor at the top of the intercooler, triggering a CEL light and P026A code. It was suggested to remove the large rubber hose at the bottom of the intercooler to clean up and remove any accumulated oil/sludge that might be contributing to the fouling.

I dropped the plastic belly pan and completely loosened the clamp (or so I thought) and the hose is really tightly bound to the intercooler flange. Is there a trick to loosing this clamp so that the hose can slide off easily? Is there more to the clamp than just loosening the nut?
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Old July 19th, 2018, 12:25   #2
Veteran Member
Join Date: Oct 2009
Location: Puyallup, WA
TDI(s): 2010 jetta
Fuel Economy: best tank 50.6, worst 36

The rubber hose on the plastic flange will glue itself in place after a few years. I use a cotter pin removal tool (looks like an awl with a bent end) to slide between the hose and flange to break it free. finding a little sludge is normal.
2010 jetta, 6sp man, & tdiclub plate frame ..build date 08-09
1956 Buick Special (my dad bought it brand new)
1946 Luscombe 8E
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Old July 23rd, 2018, 17:10   #3
Tom in PT
Join Date: Jun 2017
Location: Twilight Zone, WA State
Fuel Economy: 41 mpg in '05 ; up to 57 in '13

Thanks, will try that soon.

FWIW, this issue is with my 2013 Passat, not the '05. Originally posted in the B7/NMS forum, moderators moved this thread to this forum by accident.

My '05 has never had a CEL thrown in now 13 1/2 years, no issues with sludge or bad sensors.
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