Hey guys thanks for all the help on the exhust leak problem..... One last question its about the washers and bolts I have for the intake and exhust manifolds, how many trianglar washers should I have and what does the conical washers look like? The artical shows 8 triangular washiers and 2 brass washers with special nuts and 3 conical washiers (what are these) and what do they look like??? Thanks again for all the help..340man

Howdy, well, I am dealing with that very subject - matter of fact I'm hoping the girlfriend doesn't notice the dark and greasy feeling of the keyboard now!!!

Anyway, I just got a new gasket - and it turns out all of my studs are too short to support the thickness of the gasket, with the original spacers etc. on them!!

I have been forced to use plain washers! I put two on each one so they can "move" in hopes this works!

I have no idea why stuff like this happens to me!! ????????
Did I put short studs in the head? NO WAY
Did I end up having to deal with it?? OF COURSE!!!

hahahahaha

As to your question - I know where they go but not so much exactly why - other than the manifolds need to "float" during the heating and cooling cycles. I know others will splain it lots better n me!

Later,
Dan

_________________
"I may be slow, but at least I'm not very fast!"
'69 A108 - 225, 727, 3.55, MSD6AL, a.k.a.-the brick

one round washer top dead center ...two brass/with special nut each end, rest triangle ....I use a small screwdriver to install them and nuts DO NOT OVER TIGHTEN 10-12 LBS MAX

i wouldn't use the plain washers, the correct conical washers KEEP a preload on the manifolds. they are convex shaped.

_________________
Most of the stuff people worry about ain't never gonna happen anyway!!!
chuck Anglemyer
chucks' rod garage

The cast iron conical washer is shown in the photo below (center-right)
That washer is also used on many other Mopar engines.
I only use one on a SL6, top, center position.
The FSM calls for 3 in the early years and then went to using just one, in later years.
DD

chuck - only way around my little predicament from what i can see

take it all off - including draining the head and take the short studs out and installing ones a bit longer

by the way - i used two washers that are a little bigger than the "space" and then tightened them up until they both have a touch of a bend to them

i'm also running one of the exhaust manifolds with the ribs through it - a little tougher i am hoping

until i get my cheapy duals made that is! lol

anyhow - after running it around for over an hour yesterday
no leaks so far and it's finally starting to run like it used to
only better! haha

later
dan

_________________
"I may be slow, but at least I'm not very fast!"
'69 A108 - 225, 727, 3.55, MSD6AL, a.k.a.-the brick

I don't know who rebuilt my 170, but they used big brass washers with a conical washer on top. So far no problems. I've got the triangular ones soon to be installed.

DD says he uses just one conical in the center. I'm wondering what he uses on each end.

_________________

Super Six Conversion Stromberg

upper left corner of his picture the special brass and castle type nut on each end round on in top center, all others triangle

keep on roddin'

what is the purpose of the castle style nuts,,
any reason that when using the correct washers in the correct locations,, normal hex nuts could not be used across the board?

the castle nut/brass washer on each end so manifold can float those two holes are only in exhast ,do not also hold intake

The castle nut is special, it is really a "pinch-locking" nut.
The nut's coned shape w/ slots fits into the chamfer on the brass washer.
The torque force pinches the end of the nut, so it grips the stud, at a low torque setting, so it does not come loose under heat cycles and operation. The light gasket compression and brass to cast-iron contact allows the exhaust manifold to expand and contract... sliding around under the brass washer.
A well engineered fastener system that is easily defeated if incorrect hardware is used.
DD

hopefully this is not jumping to far off topic,'
but when using Dutra's where the exhaust manifold is a two piece system or steel headers again likely a 2 piece system, and with an exhaust gasket upgrade like the aussie version mixed in,,,,

are stock nuts and bolts and studs and low torque settings still applicable?

thanks

What fastener set up do you use when using a modified rear and dutra front casting?

Also, is the nut and washer on the stud in the upper left corner of the picture you posted the castle nut/conical washer?

I've hit the boneyards and it seems when they strip the manifolds off the slants they don't concern themselves with the fasteners....guess they just end up getting buried in the dirt.

I'm good to go except for the castle/conical fasteners

_________________

Super Six Conversion Stromberg

When using a modified factory exhaaust casting, for Dutra Duals, I use the factory's fastener set-up, including the brass washer and lock nut.
As for Dutra exhaust manifolds... those dont care, use anything you want to hold it onto the head... it's so short and beefy, it does not move around much.
DD

What are the best sources for lost or rusted nuts and washers?