Rain flap on exhaust is dinging like crazy!

What did you expect when you installed it? I guess I'd probably pinch the hinge or tack weld it to hold the flap open, but it'll still block out most rain and weather. Or just remove the flapper.

 

Flap's are old school. I havn't seen one in ages. I run straights(no flaps) and when I park it and I think it's going to rain, I put a pair of bucket's on top.

 

As long as you're not letting it set for months on end during the rainy season, I wouldn't even worry about the buckets, unless you just want to. Might get a little sooty splatter out of the pipe when you fire it up after a rain, but nothing worth worrying about.

 

rain flaps! wow those are indeed old school.idle it up driver! i vividly recall the rain flaps flapping on all the old mechanical engined trucks.the noise would even superceed a defrosting reefer unit at times.thanks for jogging my memory-

 

The ones I have they have a lil plastic in them, so everytime they come down they hit plastic So no metal to metal contact which equals no noise. So try adding a plastic piece or somethibg

 

amd the plastic doesnt melt?
get brittle crack
all a waste of time nowadays

 

never heard of rain flaps.






























I HAVE heard of rain caps !

 

Like most have said.........rain caps aren't a necessity unless the truck is parked for a long period of time.........keeps the rain water from getting in there, pooling in a low spot and eventually rots a hole in your exhaust pipe.
On the other hand, if your shut down overnight, it rains, then you restart the next morning it will blow black water and soot out the stack and all over anything in the vicinity.......including someone elses truck. And anyone whose tried, knows that stuff does not wash off easy.
If you would like to keep the rain caps, and quit the dinging, you can weld some counterweight to the back of the cap. Try mechanics wire to temporarily hold the counterweight until you find just the right amount. Once you find just the right balance of weight, weld it on permanently.

 

Trucks with diesel particle filters have no soot in pipes to blow out after a rain.