A flapper that did not keep the rain out.

[islandguydon]

Is there any good reason why a flapper did not keep the rain out. I installed one a few weeks ago. The cut was straight and the flapper is level and flat. I went out and started the deuce and the exhaust sprayed black chit all over a fresh paint job. I was pissed beyond belief.

After wiping off the crud and letting it dry it took 4 cans of rapco tan to repaint back to fresh. Is there any way at all to keep the rain out other than a coffee can..?

Apparently the flap is a bust. GRRRRRRRRRRRRRRRRRRRRRRRRRRRR

 

[FireFighterHill]

condensation?

 

[ODdave]

Wind.

 

[shenkmen]

Gimpy parked your truck?

 

[FormerNewMVGuy]

I had one on my 5 ton and it always did the same thing, So i went back to stock stack configuration, and put a coffeee can lid on the end of the stack.

 

[wdbtchr]

I've seen the flappers on my tractors stand up vertical in the wind during blowing rainstorms. I figured out the counter weights on the backside to make them open were the culpert. I cut down the counterweights on the ones that had them and added weight to the flapper of the ones that don't.

I don't have flappers on my trucks, I still use coffee cans on them with a wire and weight to keep them on.

 

[islandguydon]

I was thinking of welding a 1/2" nut on the bottom of the J pipe and installing a plug. Has anyone done this before..? I know it sounds crazy but it does make sense to me.

 

[ryan77]

I was thinking of welding a 1/2" nut on the bottom of the J pipe and installing a plug. Has anyone done this before..? I know it sounds crazy but it does make sense to me.

Weld a bung with a ball valve on! Open it to drain it and close it when your ready to start!

 

[crazywelder72]

Weld a bung with a ball valve on! Open it to drain it and close it when your ready to start!

or a small petcoc may work

 

[ryan77]

I should have said 1/4" ball valve!!!

 

[Heath_h49008]

I like that solution...

Or if you wanted to get really slick you could make a side vented sleeve that slid "up" when exhaust pressure lifted it and exposed an opening()s. Gravity would close it and wind couldn't lift it.(maybe a tornado) You would probably want stainless to prevent it rusting in place, but you could prototype it with steel. Add a small bolt to limit upward travel and voila. It would have some effect on backpressure... but only enough to equal the weight of the lifted section.

Totally nutty idea, but you didn't pay much to hear it.

 

[ryan77]

If u want to get really nuts, Get a electric exhaust cut out, Have it wired and flip it on when u fire it up!! When its closed it will be water tight

 

[ODdave]

Just go all out and drill a 1/4 hole and........ Leave it. Your not gonna leak enough exhaust to matter.

 

[overlordofmars]

We had an old Cat dozer we used in Guam, I know it sounds nuts but we had the exhaust going up, doing a 180 and basically facing down. I have to find a photo. Its hard to describe imagine an upside down J . It worked and kept the monsoon rains out of the engine.

 

[ryan77]

Just go all out and drill a 1/4 hole and........ Leave it. Your not gonna leak enough exhaust to matter.

Yes that would be to easy!!!!!

 

[joshs1ofakindxj]

Just go all out and drill a 1/4 hole and........ Leave it. Your not gonna leak enough exhaust to matter.

^ So much win after reading those over-the-top answers.

I have a degree in mechanical engineering, but I also have the common sense to know when to put it away and just fix the darn thing.

 

[AceHigh]

When I first got mine more exhaust came out the bottom then the top. The good news is replacing the "J" is pretty easy.

I just use a coffee can, and almost always forget to remove it till the engine sends it flying.

 

[marchplumber]

I use a small "Folgers" plastic coffee can with the labels removed. It fits snuggly, will blow off with engine pressure and is red. Sort of like the "remove before flight" tags on an aircraft. Works great and another benefit of it is, it keeps birds out! Before I started using it, I shot birds out of the exhaust on two separate occasions. If you lose it, you can always drink some more coffee and presto, you got a "new" one. LOL
God bless,
Tony

 

[dabtl]

The red one pound Folger's coffee can is the easiest and cheapest of all solutions.

Fits tight, blows off under pressure and I always have a new one in waiting.

 

[ixpacman]

I just put a flapper on my 71 m35a2 and it had a hole through the counterweight and bracket that you can put a bolt or other device to lock the flapper closed.It is walker part # 35619. I haven't had time to see if it will keep rain out but it seems like if you had a similar part you could just drill a hole through a place where the counterweight and bracket line up and accomplish the same effect.