is this bad?

 

Well my Dad wants to put stacks on his Cummins. But he's been a mechanic for 30 years so he says he hasn't done it yet because he can't decide what to do about keeping rain out of the pipes. Drilling a hole in the bottom would let rain run out, but it would also let water in if you cross a stream or something off-road. If your truck is sitting and a big thunderstorm rolls up you could get inches of water inside your exhaust system. Obviously this is bad news. We are already going to be working on my buddies truck this weekend because it is hydrolocked and destroyed the engine. We don't need another one that way. So I just wondered what you guys had been doing to keep water out of your stacks. Thanks for the replies.

 

Just a guess here but I would say that most exhaust systems are not totally leak proof anyway when it comes to water intrusion. Mine have been on for near five years now and never had a problem even in all the storms and snows.

 

Hi
I have been a member for awhile but just been lurking in the bushs
I want stacks on my truck also and water was a concern as well. Below is the url for a web site that handles a lot of big rig parts and they have something that they call a stack hat. I hope this works. I have never replied before
Lloyd Henry





http://www.iowa80.com/iowa80/shop?me...atid=STACK-HAT

 

i just drilled a hole underneath ( 1/8") and all was well....if your stream crossing, your moving, not much water will get in the 1/8" hole and what MIGHT will blow out. i ran mine for most of the winter with no problems...another thing with streams...you could get water in your axles even with extended diff lines...but you dont fear having axles do you? j/k...seriously tho, put them on, drill a hole and you will love them.

 

If it rains that much then you've got other things to worry about than water filling your exhaust.

 

Yeah, like building an arc

 

Ever since 1985, I have had a pair of 4" stacks, with mild turn-outs at the top, on my truck.

They have sat outside through many a Kentucky deluge with nary a thought to their welfare.

As previously stated, due to the constant heating and cooling, most exhaust systems are far from watertight.

The only thing to beware of is starting the truck when water is standing in the exhaust; be sure the doors are shut and windows closed; as, black,greasy water is gonna blast out in a fine spray and get all over everything.

Now, a farm-tractor, or piece of equipment, with the exhaust manifold outlet and pipe pointing straight up is a different story.

They had better have a stack-cap or a bucket or jug or something capped over them; as, the water has a direct path to destruction.

 

good theory except for the fact that a stack system should have a length of flex pipe...

and I would highly recomend using lap-band clamps to connect the flex... not only will the system be very servicable, but these clamps will allow water to sneak past.

I never had a problem w/ soot shower w/ my miters UNLESS I started the truck after it had rained, then killed it shortly after, and then fired it back up...

with no standing water in the pipes, the soot will be damp, and won't blow everywhere on initial startup... but if you let it idle a little or drive around very briefly and heat up the pipes, that soot is ready to blow... if you keep driving, it'll just come out as you're driving, and you'll never notice it.

if you kill the truck and then fire it back up, it'll rain down soot!

 

Yep, that the facts jack............