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cowl vent drain hose
Posted: Sat Jun 05, 2010 4:02 am
by HingsingM37
Last weekend while caught in the rain, I had a steady stream of water hitting the trans cover. I then realized I did not install the cowl vent gutter hose. What is the routing for it? Does it exit the firewall on the passenger side?
Re: cowl vent drain hose
Posted: Sat Jun 05, 2010 7:28 am
by rixm37
David I had the same thing happen with not having a drain hose. It was a surprise to me to see water pouring in on the floor
I routed the drain tube through a hole in the fire wall and down by the shock mount and zip tied it in place.
The funny thing is, that was a couple of years ago and I haven't been caught in the rain again!! Life in the desert

Re: cowl vent drain hose
Posted: Sat Jun 05, 2010 10:37 am
by hbb
I have a question? What is rain it seems to be an evasive in my area. It seems that getting a chance to actually drive it always happens when I am sleeping or at work then it’s done! So my M37 has no leaks any where! Maybe a little dust seeps in but no rain!
Hb
Buckeye, AZ
Re: cowl vent drain hose
Posted: Sat Jun 05, 2010 11:33 am
by HingsingM37
Confound you desert rats

Re: cowl vent drain hose
Posted: Sat Jun 05, 2010 3:35 pm
by mike_l
Mine routes out the firewall behind the horn, I think the speedo cable routes through at that point also. The TM lists it as 7/16" ID, 5/8" OD, 11" long. Mine is roughly that long and it sticks out the firewall wall about 3" so that it drips on the back corner of the engine block. Probably routing it down lower would be better or at least long enough to miss the engine.
Re: cowl vent drain hose
Posted: Sun Jun 06, 2010 8:27 pm
by rixm37
Well David the desert can get even a rat. 106F today and I was helping a friend dig up his water main!! Polybutelene pipe sucks!!
The M was sitting it out in the garage at home

Re: cowl vent drain hose
Posted: Mon Jun 07, 2010 5:42 am
by Joe
rixm37 wrote:Well David the desert can get even a rat. 106F today and I was helping a friend dig up his water main!!
I'll trade you! I'm in Florida and the "official" forecast is for a high of 92 but that's complete BS! Our temperatures are
consistantly running 5 to 7 degrees higher than the "official" numbers. Add in the 80+% humidity and the heat index is forecast to be 102! Considering the actual temperature the heat index will be much higher!
Re: cowl vent drain hose
Posted: Mon Jun 07, 2010 9:00 pm
by rixm37
wowowo Joe I will take my dry heat thanks !!
Re: cowl vent drain hose
Posted: Tue Jun 08, 2010 3:37 am
by Lifer
Joe wrote:rixm37 wrote:Well David the desert can get even a rat. 106F today and I was helping a friend dig up his water main!!
I'll trade you! I'm in Florida and the "official" forecast is for a high of 92 but that's complete BS! Our temperatures are
consistantly running 5 to 7 degrees higher than the "official" numbers. Add in the 80+% humidity and the heat index is forecast to be 102! Considering the actual temperature the heat index will be much higher!
Awwww, c'mon guys! Isn't that why you live where you do? I sure as heck know that I moved south for a reason!

Re: cowl vent drain hose
Posted: Tue Jun 08, 2010 6:10 am
by rixm37
Right on Lifer
I'll take 4 months of heat instead of 9 months of cold. 100F and 2-3 % humidity and you can stand in the shade and its not bad. Heck drinks don't even sweat, no coasters needed. You can pour water on your self and cool off quick as it evaporates so fast.
Re: cowl vent drain hose
Posted: Sat Jun 12, 2010 10:45 am
by Brett
rixm37 wrote:Well David the desert can get even a rat. 106F today and I was helping a friend dig up his water main!! Polybutelene pipe sucks!!
The M was sitting it out in the garage at home

Funny, Thats how I spent my Memorial day weekend. I'm the last one on my street to get rid of the PB crap. I did 200' of pex instead.
Brett
Re: cowl vent drain hose
Posted: Sat Jun 12, 2010 9:18 pm
by rixm37
PB is a great product isn't it Brett !! What happened to copper ? I see that all houses are now plumbed in some sort of plastic. No copper anywhere!
So what's to say the new plastic is better than the old stuff?
Anyway sorry you had to dig. It was farther than we did by a bunch !!
Re: cowl vent drain hose
Posted: Sun Jun 13, 2010 4:12 am
by Lifer
rixm37 wrote:What happened to copper ? I see that all houses are now plumbed in some sort of plastic. No copper anywhere!
It's because of all the enviro-nuts fears that lead will leach out of the soldered joints and contaminate the water, making it unsafe to drink. They also fear that any such water released into the environment (washing cars, watering lawns, draining the bathtub, flushing the john, etc) will contaminate the ground water. They do not seem to have any such qualms about the chemicals used in the glue that holds the plastic pipes together.
Re: cowl vent drain hose
Posted: Sun Jun 13, 2010 10:48 am
by DJ
Price is a big factor, along with labor cost. For supply lines no elbows are needed the plastic can be bent around the corners or obstacles and no need for splices . Plastic will last longer too,if your water is corrosive.
DaveJ