[DML] Re: Exhaust system, engine rattle and port for emission testing
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[DML] Re: Exhaust system, engine rattle and port for emission testing

Rather unusual bit not impossible as you have found out. There are
actually 2 of those ports, one for each bank of 3 cylinders. The
origional is not exactly a standard bolt but one should fit. As for
finding it in the manual try the Parts Manual section 1-5-0 #'s 13 &
14 x2 part # 108245 and 108246. It is also refered to in the Workshop
Manual D:04:01 para 3, #13 & #22.
 Leaks and noises can be very frustrating to find. The techniques you
used don't always work until it is so loud and obvious that it is easy
to find. Even for experienced mechanics there is always a new noise to
find! Imagine how much harder it is for us to try to help when we can
only go by a description! In the end persistance usually helps. The
best thing to do would be to order the correct hardware from one of
the vendors with the gaskets, run a tap into the threads to make sure
they are in good shape, and then put the parts in with some Never
Seize. It's funny though, if you wanted to remove the plug it never
wants to come loose but in this case it fell off!!!!!!
David Teitelbaum
vin 10757

--- In dmcnews@xxxxxxxxxxxxxxx, "JSJB100" <jsjb100@...> wrote:
> Hi All
> A few weeks ago after my 700 mile round trip journey to DCS, 2957 
> developed an engine rattle, which was continuous and didn't change 
> with revving, present at startup.  No less that 4 of us tried to find 
> it, to no avail.  Talked to Rob Grady and inspected the "usual 
> culprits", but no luck.  10 days ago, the rattle was suddenly 
> replaced with a roar...uh oh, hole in the exhaust system?
> Turns out that the rattle was probably a 13 mm bolt that is in a hole 
> on the passenger side of the car, back of the engine compartment 
> worked its way out and the bolt and/or the washer was rattling.  When 
> it finally popped out, voila, exhaust roar.  We found it using the 
> old "rubber hose" trick...that is, place a rubber hose many places 
> around and about the engine and see if you get hot air in the face. 
> We then put a broomstick on top of the hole, and the roar went away. 
> So, a $2 replacement bolt got rid of the roar and no rattle anymore.  
> Talked to Rob, he says "sure, can happen"  He mentioned that the hole 
> was there for "emission testing". 
> I had searched and searched on the DML for "engine rattle" and didn't 
> find this mentioned. Since I didn't find anything on the DML about 
> this, thought I'd pass it along. And...I couldn't find a diagram or 
> mention of this in the shop manual, so as an FYI to others.
> Rob, as usual, thanks much!
> Joe B.
> 2957


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