[Healeys] Exhaust Manifold Fasteners

[Alan Seigrist]

BTW, do not use flat washers or lockwashers.  Brass nuts, when new and
properly torqued, lock in place naturally.  Washers will make it easier for
the nuts to loosen.  I suppose you can use lockwashers, but I hate using
them if they weren't there originally.

Alan

'52 A90
'53 BN1
'64 BJ8


On Wed, May 13, 2009 at 5:45 PM, Alan Seigrist <healey.nut at gmail.com> wrote:

> Bob -
>
> I'm wondering, are your down pipe flex hoses in good shape?  If not that
> might be causing the unscrewing.
>
> I use brass nuts only, with anti-seize, torqued down about 40 ft lbs.  The
> trick is to ease them on in succession like when you put on a wheel or a
> cylinder head, which will help center and compress the gasket evenly.   I
> also ALWAYS use brand new brass nuts and gaskets every time I do this. I
> also replace the studs if the show signs of corrosion.  throw away any old
> brass nuts you have.
>
> Doing it this way I've never had a problem... last time I tightened my nuts
> on the BJ8 was probably in 1995.
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8
>
>
>
> On Tue, May 12, 2009 at 10:11 PM, Bob Spidell <bspidell at comcast.net>wrote:
>
>> Listers,
>>
>> I've had an ongoing problem with sealing my BJ8's exhaust manifold to the
>> downpipes (the nuts keep loosening and/or the gaskets blow out).  I now
>> believe the problem is due, at least in part, to my using flatwashers under
>> the brass nuts (the holes on the downpipe flanges are too big for the nuts
>> alone).  What do others use to get a good, secure connection here?  Brass
>> nuts alone?  Brass nuts with lockwashers (my probable next attempt)? Steel
>> nuts with or without washers?
>>
>> Any and all suggestions welcome.
>>
>> Bob
>> --
>> *******************************************************************
>> Bob Spidell           San Jose, CA            bspidell at comcast.net
>>
>> *******************************************************************