exhaust manifold stud broken
#1
exhaust manifold stud broken
94 3.9L Magnum
I went to tighten the stud and it snapped. It was already broken since more than half of the surface of the break had old soot on it. I expect someone else started to try and stopped before breaking it all the way.
What size are the studs and bolts?
What is the best way to go at removing them and the bolts without breaking them? I expect I should replace them all both sides.
Does anyone know of a good source for an OE Y pipe that isn't all corrugated looking in the elbows?
I went to tighten the stud and it snapped. It was already broken since more than half of the surface of the break had old soot on it. I expect someone else started to try and stopped before breaking it all the way.
What size are the studs and bolts?
What is the best way to go at removing them and the bolts without breaking them? I expect I should replace them all both sides.
Does anyone know of a good source for an OE Y pipe that isn't all corrugated looking in the elbows?
#2
According to Dorman, and matching my LA 1988, they're 3/8-16 thread.
http://www.rockauto.com/catalog/rafr...parttype=13936
If they're in bad enough shape, cutting them flush with the outside of the exhaust manifold, removing the manifold, then soaking in Kroil or PBlaster repeatedly for a few weeks (!!) may be the best choice.
As to "OE y pipe that isn't all corrugated looking" - that's a contradiction *grins* However, a competent muffler shop with a mandrel bender can make one for you. If you buy an OE pipe, it'll be crimped at those points (that "corrugated look" that you're talking about.)
RwP
http://www.rockauto.com/catalog/rafr...parttype=13936
If they're in bad enough shape, cutting them flush with the outside of the exhaust manifold, removing the manifold, then soaking in Kroil or PBlaster repeatedly for a few weeks (!!) may be the best choice.
As to "OE y pipe that isn't all corrugated looking" - that's a contradiction *grins* However, a competent muffler shop with a mandrel bender can make one for you. If you buy an OE pipe, it'll be crimped at those points (that "corrugated look" that you're talking about.)
RwP
#3
Thanks Ralph but wrong bolts. Those look to be the Y pipe to exhaust manifold bolts I'll keep them in mind for when I get that far. Here is a post I found by searching this morning; https://dodgeforum.com/forum/2nd-gen...bolt-size.html I expect I will have to remove the manifolds and then the studs to take them in to AZ to replace. Did the same thing for my intake on a Dodge Ram50. Seems like the dealer charges $32 and their fasteners have the breaking problem. That price is in a 9 year old post so it may be more now.
#5
#6
There are many possibilities. Did you get the right studs, bolts and washers from the dealer? There are special washers for the studs, I forget what they are called but they are curved. The curve faces in to the block. The exhaust manifold may be warped and when it heats up put undo pressure on the stud or bolt.
#7
Bonneville washers; you can buy them from places like Mancini Racing ( http://www.manciniracing.com/maraexmacowa.html ).
RwP
RwP
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#8
#9
I have had no problems with it since I fixed mine.
#10