Installed Dana marine flow torque 496HO, need some help??
 

Got everything hooked up today, double checked everything and then cranked it up.. sounds awesome! i let it idle for a good while and checked for water leaks, and couldnt find any, then i checked for oil leaks and didnt see any either. so far so good, temp was around 160ish, water coming out both tips.. so i decided to go ahead and give it some gas, (please keep in mind this is on the hose not in the water) and then the alarm sounded and when into guardin mode. port side riser very hot to the touch, other side not so hot.. im assuming it was the manifold temp sender that put it into guardin mode, but who knows, like i said no leaks what so ever, water coming out tips, but port riser very hot. one thing that i didnt like right off the get go, was the jumper hose dana gives to install from manifold to riser, not a very good fit, kinda kinks it, but i didnt think it was enough to cause this? any ideas? thoughts? im startin to get very irritated with this, i just want to ride.. please help..

help
 

i was also wondering if there's anything i can do to start testing certain things like the manifold temp senders, can those be ohmed out? they are the brass and they are brand new, i just bought them, or if there a way i can trick the system and figure out what is causing it. also my drive bottle has oil and the engine has oil as well, so im almost 95% sure its a water concern, please help..:mad:

any ideas?

Ritts,
I assuming that you haven't had any trouble before the install? Have you had the boat out on the water this year? You can't usually get the proper water flow out of a hose. I always use a giant plastic tub filled with water under the outdrive. It is possible that you weren't getting the proper water flow to cool the engine and everything. I would try and take it to a body of water before trying to fool sensors and such. Good luck!

I have found that Exhaust Manifolds all get hot on the hose, back it down the ramp and check it there.

overheat
 

I always flush my boat on a garden hose when i get home, its never been a problem before, ran awesome.. i cant see why adding some exhaust would change that, these manifolds use the same check valves from the stock old stuff so its the same water coming in.. also one manifold was warm and the port was hot, i could barely keep my hand on it, which is not normal, the stock stuff i could hold onto no prob. but i do plan to back down the ramp this AM and see how it acts, im also putting a longer jump hose to see if that helps. from there who knows, more to follow.. next step is a merc. computer to see what codes im getting and why?

If the riser bypass hose(s) is(are) kinked it can slow the sea water flow throughout the entire cooling system resulting in everything running hotter than normal under all conditions. In other words do what ever is necessary to get all the kinks out of the riser bypass hose. I installed the Dana's with the O2 sensor blocks and the suppied hoses were too short so I jury rigged some hose to get running that also had kinks. The engine temperature was then ~20*F hotter than normal until I added some hose clamps at the kinks to make them round again. Temperature then back too normal. The manifold and risers and exhaust hose were not abnormally hot however and no warning buzzer or Guardian mode kick in.

If your exhaust manifold was hot to the touch it is not getting enough cooling water for what ever reason and the sensor should go off. Where and what parts of the manifold / riser / exhaust hose were hot to the touch? You may have internal blockage somewhere that is causing the restriction or internal diversion of the sea water flow.

If you have a low water pick up on your drive, make sure to tape it up so you can build high enough water pressure while on the hose.

Try using 3/4" wire reinforced water hose for the jumper- it won't kink. I had to do that on my port side manifold.

help
 

just so you all know me and my buddy hooked everything up in the manner the direction called for, and there are no kinks coming into the manifold and i didnt have any problems before we started this, so i dont think i have a blockage, i did have a semi kinked hose going from manifold to riser, so i went got a much longer hose and made one to see if that helps. thats the only thing that i can see, but i dont even see how that would have caused it.

my buddy who is a merc mechanic looked at it yesterday and noticed that the ECT is on the back of the manifold and the water inlet(check valve thing) coming into manifold is in or near the front. then he said and then the manifold to riser hose is also in the front and we all know water takes the path of least resistance, so the ECT isnt getting much water flow and getting to hot... which is a valid point and this was a major problem for eddie marine as well.. the only problem with this is im sure dana marine would say that they have enough of these exhaust sets out there that never had this problem and there all hooked up this way.. so im not sure what im going to do.. we'll see how todays run goes

It's natural for one exhaust to get roughly 20 degrees hotter than the other. They still should not exceed 120-130 degrees. As previously stated, running it on the trailer if you have a low water pickup can be an issue. I had a boat we did a shifter install on the other day, and when we fired it up on the trailer to check the shifting, when we reved it up, the alarm would sound. The boat had the CMI kit, and the headers were pretty hot. We were using side ear muffs, with a ton of water, We plugged off the front, and it was fine. The rear location of the heat sensor, does make the sensor a little warmer, but nothing that will casue the alarm to sound under normal operating conditions. We've had a couple of installations where the the lower merc fittings were bleeding off water and caused the exhaust to get hot. The upper hose should not be kinked. If it is it will cause a slowing of water flow through the system, and not only sound the heat alarm, but also possibly hit the pressure sensor on the water system. Check for hose kinks, if the hoses are good, check the lower fittings to make sure they are not bleeding off water. This can be done by pluggin the drainback line. At that point there is nowhere else for the water to go. The only other potential issue is a mis-alignment issue with the tailpipe and exhaust boot. Some exhaust boots have a rubber inner stop that hangs down in the exhaust boot roughly 3/16" of an inch. If that boot is crammed up against the water outlet of the riser, it will slow the water flow. If you need any further assistance, please let me know.

pictures
 

heres some pictures of the install and how they look, again they look awesome and sound awesome, just a few bugs to work out, i really wish dana marine was close cause im sure they would have this fixed in no time.. might have to send a plane to pick one of them up for the weekend:evilb:

forgot
 

also you'll notice i had to make a different hose on the port side so the water would flow better, theres a lack of water flow to this side of the motor, i know that much!

Ritts, I had the same issue with my Dana exhaust port side was getting hot setting off temp sensor..what my mechanic did (Jaime @ Lakeside) was get more water flow to the port side by removing the drain back valves and installing a adjustable valve in where the Dana piece is in the above pic that way you can tune the water pressure to port & starboard side and get the temps on each side very close....been running my boat that way for a month now with no issues at all as a matter of fact ran this past weekend (Fri, Sat, Sun) and boat ran flawless.

Unfortunatley Dana was NOT a big help to Jaime and myself because at the time they said they had no issues like mine so Jaime was behind the solution....good luck


Undertaker

Using a scan tool to observe the left and right exhaust manifold temperatures on a fully stock 496HO with the earlier Cool Fuel System, they both read ambient at start but as they warm up and stabilize in temperature the same side is always about 20*F hotter than the other side. I can not say which at the moment. I assume it has to do with the sea water cooling different things on the different sides of the engine and likely water could be hotter on one side than the other before it enters the exhaust manifolds.

This same temperature differential now exists since installing the Dana's.

Jaime @ Lakeside did put my motor on his laptop while he was running the boat port side was 60 degrees hotter than the starboard thus the temp sensor going off. On a stock motor there is a degree difference between port & starboard, port being a little hotter like 20 degrees, but not 60 degree difference.

PM me if ya need any more info, it fixed my problem.


Undertaker:D

On my stock 496 the port side runs about 15* warmer.

Did they tell you to go to the hardware store?:evilb:

They told me to change props and get my tach looked at......
it is a long story.....will not get into it here

Undertaker:D

Makes me glad that Dana changed their price after the first of the year. I almost had these same headaches and the less than stellar results that I have read about. Though there has not been much talk about them. I am sure they sound good and look purdy.

I missed that. What was the before price and what was the after change price?

I don't remember the exact price, but I remember the price I was quoted was under 2K per set. After I said order them, I got a call back apologizing and was told the price they quoted me was from the first of the year price sheet and that it had changed. In fact he told me that he called Dana and tried to get them to meet in the middle somewhere due to the fact he had already quoted me the lower price. That was a no-go, but I could buy them at their distributor cost (which was well over 2K), and they would make no money on the deal. Even with all the talk about how great they were, I decided at that point to hold off.

Here is another thread where I mentioned it some time ago.
http://www.offshoreonly.com/forums/s...6&postcount=15