Cooling Problem

[dogbert]

Ok, so we went out last night and about 15 minutes into the ride, the alarm starts going off. I check the temp gauge and it's about 170 (right where it's supposed to be). Oil pressure is good. Oil and tranny levels are normal, V-Drive looks good. It's an intermittent beep that goes to solid alarm when i go above 3200 Mph. I still have plenty of power in all ranges. The only strange thing is that the drivers side exhaust manifold is cool to the touch and the passenger side is very warm, but not hot. All battery connections ok, no loose wires under the dash.

I'm thinking marginal impeller that may have partially shredded with some blockage.

Thoughts?

[zad0030]

Ok, so we went out last night and about 15 minutes into the ride, the alarm starts going off. I check the temp gauge and it's about 170 (right where it's supposed to be). Oil pressure is good. Oil and tranny levels are normal, V-Drive looks good. It's an intermittent beep that goes to solid alarm when i go above 3200 Mph. I still have plenty of power in all ranges. The only strange thing is that the drivers side exhaust manifold is cool to the touch and the passenger side is very warm, but not hot. All battery connections ok, no loose wires under the dash.

I'm thinking marginal impeller that may have partially shredded with some blockage.

Thoughts?

I think your first problem is you were going above 3200 mph, I never go over 2500 mph because it starts purpoising real bad.

I would agree that something is clogging you passenger side manifold.

Did you check the impeller? Is it all still there?

[chpthril]

Ok, so we went out last night and about 15 minutes into the ride, the alarm starts going off. I check the temp gauge and it's about 170 (right where it's supposed to be). Oil pressure is good. Oil and tranny levels are normal, V-Drive looks good. It's an intermittent beep that goes to solid alarm when i go above 3200 Mph. I still have plenty of power in all ranges. The only strange thing is that the drivers side exhaust manifold is cool to the touch and the passenger side is very warm, but not hot. All battery connections ok, no loose wires under the dash.

I'm thinking marginal impeller that may have partially shredded with some blockage.

Thoughts?

I think your first problem is you were going above 3200 mph, I never go over 2500 mph because it starts porpoising real bad.

I would agree that something is clogging you passenger side manifold.

Did you check the impeller? Is it all still there?

I agree with Zad, you need to keep it under warp 5 there Scottie J/K

It does make me wonder about a blockage. Not uncommon for there to be a slight diff in manifold temp, but one hot and one cold

Run it on the fake-a-lake and see if you get water out of both exhaust outlets.

[dogbert]

I think your first problem is you were going above 3200 mph, I never go over 2500 mph because it starts purpoising real bad.

Well, I'm running a 13x11.5 pitch prop. Trust me, it isn't warp speed @3200 RPM.

You can avoid porpoising if you add more weight your bow, young grasshopper

[da.bell]

This "breakdown" might give you enough power to convince Mrs Dogbert that your family needs a new RZ2...

[ragboy]

Well, I'm running a 13x11.5 pitch prop. Trust me, it isn't warp speed @3200 RPM.

You can avoid porpoising if you add more weight your bow, young grasshopper

They are messing with you, you said 3200 Mph, not RPM. So you said you were going over Mach 4. I hope you would have alarms.

[da.bell]

They are messing with you, you said 3200 Mph, not RPM. So you said you were going over Mach 4. I hope you would have alarms.

blah ha ha ha ha

[R&T Babich]

With the water temp at 170 and good oil pressure I would look at warning system connections. I'm not sure, but there may be a different sensor for the water temp gauge and the warning system. Check the push-on oil pressure sensor connector. It may be loose and the warning system may respond faster than the gauge does. The gauges sorta average the reading while the warning system may be instantaneous. Our manifolds are the same as yours - one cold, the other warm. I'm going out tomorrow and I'll see if they are the same sides as yours.

[dogbert]

With the water temp at 170 and good oil pressure I would look at warning system connections. I'm not sure, but there may be a different sensor for the water temp gauge and the warning system. Check the push-on oil pressure sensor connector. It may be loose and the warning system may respond faster than the gauge does. The gauges sorta average the reading while the warning system may be instantaneous. Our manifolds are the same as yours - one cold, the other warm. I'm going out tomorrow and I'll see if they are the same sides as yours.

Ok, that's helpful. My dealer suspected the same thing. We'll see. Hopefully he can get me turned around by Saturday. I'm off to the lakehouse next week for some long overdue R&R.

da.bell, the first thing out of Charlie's mouth was "Ya know, there's a couple of Ve's and one RZ2 over there in your favorite colors all ready to go, want me to hook one of them up?"

zad, good one...you got me. Do you think I'd have some kind of world record for taking my Tige to Mach 2?

[da.bell]

Do you think I'd have some kind of world record for taking my Tige to Mach 2?

Worlds Fastest Boat!!!!!!!!!

[R&T Babich]

dogbert - the driver's side exhaust manifold on our boat is cold and the passenger side is warm, definitely not hot. You can rest your hand on it. I think this may be typical. The raw water inlet to the thermostat housing is on one side and that may affect the flow thru the system.

[CP3]

my passenger side exhast is always hotter.....

[mneal]

It has to do with the water flow paths thru the block, every SBC I have ever seen the port side is warmer then starboard, totally normal. If you can hold your hand on the riser then it is in the acceptable range. I dunno about Tige' but my Volvo Penta has separate sensors in the risers for over heat.

[dogbert]

Yup, it wasn't a cooling issue at all. It's a fuel pressure problem. My dealer had to order the part. Looks like my week at the lake got a lot shorter. If I'm lucky, I get it back on Tuesday.

[R&T Babich]

dogbert - what was the problem? What does the engine monitoring system monitor besides oil pressure and water temp? If it's fuel pressure do you know where the sensor is?