Logo
FULL SITE MENU

Correct running temp for AQ131

C

chief_wiggum

New member
"Just trying to figure out IF

"Just trying to figure out IF I have a problem or not... I've gone completely through the cooling system on my 86 Bayliner, and everything is in good shape. It has a 180' stat in it, and when idling in the water it will stay there all day. Once you get running though, the temp climbs (slowly) to ~200 (hard to tell exact temp with vague crap Bayliner gauge).. It doesn't *seem* to be running hot. Doesn't smell hot, not spitting out coolant, etc but I just want to know what is considered normal..

Just FYI.. here's what I have done as preventive maint.
replaced seawater impeller, seals and drive cog, replaced the seals that go into seawater pump. installed a garden hose fitting with clear 5/8 hose between transom and metal water intake, removed disassembled cleaned and re-installed heat exchanger... found ZERO corrosion inside. Removed / tested / re-installed t-stat. Removed inspected and re-sealed intake hose and elbow on outside of drive.

The only things I found that were suspect were the following.
1. the coolant appeared to be STRAIGHT 100% coolant.
2. intake elbow looked like it had been sucking air. there were marks on the flange when disassembled.
3. seawater pump- impeller was a bit hard / stiff. good shape, but didn't seem as pliable as it should be.

Sorry for the lon-winded post. just wanted to give a clear picture of where I'm at.

thanks for advice.
-randy"
 
"So, I guess it's probably

"So, I guess it's probably running fine then. Just seems unnerving to see the gauge go up UP !

thanx 4 the in-flammation."
 
yeah not too bad. remember th

yeah not too bad. remember that's hot for us but not for metal parts. it definately sounds like you did your home work anyway
 
"I have the same engine and it

"I have the same engine and it is bothers me to see my gauge at around 200 deg F. But everything is OK, so I guess that is the way it is meant to run.

Have a great day.

Rob."
 
"Who knows about the Bayliner

"Who knows about the Bayliner Gages..?? I think the important thing is 'change' but that is supposing you have had the boat long enough go note a change in temperature reading, else you will not know the 'norm'. If it has always run with the gage at about 200 ok. If it has changed recently you could have a problem.

Correct me if I'm wrong here, and I'm sure someone will
lol.gif
but does not a 180 deg t-stat start to open and 180 and is fully open an some higher temp? Or, is it fully open at 180 and attempts to maintain that temp? I think I'll go google
proud.gif


Tom"
 
"The required thermostat is fu

"The required thermostat is fully open at 198 degrees C. I think these engines are meant to run a little hotter.

Have a great day,

Rob."
 
"Let's put it in this way.

"Let's put it in this way. The thermostat can control the coolant temperature between 180º and 198ºF. Above 198º, the thermostat is fully open and is allowing full flow of coolant to the heat exchanger. Therefore, any increase in temperature above 198º cannot be lowered by increasing further the coolant flow.

Clear as mud?
biggrin.gif
"
 
Running 100% antifreeze will c

Running 100% antifreeze will cause a temp rise of 20F above that produced by use of 50/50 mix in the cooling system. I have confirmed this in experiments.
 
Dennis is correct. Antifreeze

Dennis is correct. Antifreeze does not function properly alone without water. Antifreeze will work well up to about 75% but will lose effective cooling capacity beyond that.
 
"Yeah, that's why I put th

"Yeah, that's why I put that as one of my "suspect" points...

I didn't test the coolant, but it looked VERY green, and seemed thicker.. Mixed coolant usually appears diluted.. Of course that's my calibrated eyeball test... I spoze I could have gotten a hydrometer to test it.. *shrug*"
 
Back
Top