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posted on August 2nd, 2012 at 08:21 PM
exhaust soot.
Hello,
Having just got the 72 VW 1302s last week (after 3 years apart), I have been spending some time looking at and under her. Just had the motor rebuilt,
replacing the block and the innards, and only done a couple hundred miles.
I noticed on the Driver's side of the motor, that the push tubes and cooling fins are covered in soot, as if from the exhaust. A small hole in the
tinware has also left soot on the inside of the bonnet/boot lid above it. The passenger side is fine.
I cannot find a leak in the exhaust manifold flange area. Is it possible there's a head issue? I'm hoping it's something small, but i'm a little
concerned. I will pull the tin off after work tomorrow and have a look properly.
Any likely causes I should be mindful of?
Oh and coasting down a hill with nil throttle this morning, I thought I heard a pop/backfire, but a one off. Driven gently... She seems to drive
well otherwise.
Thanks.
Joshua.
vlad01
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posted on August 2nd, 2012 at 10:15 PM
yes the heads may not be sealed properly.
were they machined? was the case registers decked square? was the heads torqued correctly? has it over heated since rebuild? cylinders sit flat and
square when torqued down?
make sure the exhaust is checked properly before looking else where though. could be pulling things apart for no real reason otherwise.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
joshuah
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posted on August 17th, 2012 at 08:29 PM
I tightened up the exhaust manifold bolts. Got maybe an eigth of a turn out of them, but didn't want to overdo it, having snapped one before! Also
refastened the muffler clamp thingys, as there was a bit of a leak on one.
Cleaned the push rod tubes and so far so good.
Thanks for the reply. Glad it's not more serious, for now...
