Your advice is good, except my box wrench won't fit 'round the head of
the bolt. I can get an open-end wrench on it, or a socket (at a slight
angle), but the exhaust pipe is too close to get the box end on.

About heating a nut with a torch -- this would be a new technique to me.

If this was a nut then heating  would make the nut expand -- is that why
you recommend heating it?

But here we have a bolt (see Page 26.7 Bentley Vanagon, "exhaust pipe,
front") so I wonder if heating it would accomplish much.

On the other hand, if all we are trying to do is heat these not-rusty
but bonded parts then allow them to cool in order to weaken the bond, it
makes sense to do it here.

--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westphalia: "Mellow Yellow (The Electrical Banana)"
KG6RCR

vw4x4@fyi.net wrote:

> Throw that wrench away.  A good box wrench should be used here.
> If you rounded the nut off enough and this will no long work, use
> a small pair of vise grips,  and then throw the nut away when you get it
> off.   That's only if you get it off without breaking bolt/stud first.
> Heating it with a torch is the only good way of  removing very rusts
> parts.
>                                Eric
>
> Rocket J Squirrel wrote:
>
>> I'm trying to pull the bottom cover off the passenger side of this 1.9L
>> WBX engine so I can determine if a coolant leak is coming from the head.
>> It is affixed to the engine in four places. I've gotten three loose, but
>> the front (front is front) where it mounts to the exhaust port with a
>> bolt is being tough. I have PB Blasted the bolt and let it soak, but it
>> won't budge. All I can get on it is a 13mm open-end wrench . . . tips?
>> Suggestions?
>>
>> --
>> Mike "Rocket J Squirrel" Elliott
>> 71 Type 2: the Wonderbus
>> 84 Westphalia: "Mellow Yellow (The Electrical Banana)"
>> KG6RCR
>>
>>
>
>