HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Operating temp

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Operating temp

Post  wanczykj on Mon Feb 01, 2016 5:37 pm

How hot should my steel block f body 5.3 liter run?

At idle it sits middle of the gauge, on the highway it runs right around 205 degrees F, and after being pushed it jumps up to 220 degrees F.

Should I be concerned?

wanczykj

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Re: Operating temp

Post  FrostedFlakeJake on Mon Feb 01, 2016 6:08 pm

At idle it sits middle of the gauge

What temp is at the middle of the gauge?

The guys on the truck forums are almost are continuously at 210°F
A few here and there say if they are at max load (towing near the max) they will occasionally see 220°F.

I would keep an eye on it. If it hits 230 I would start considering things like thermostat, antifreeze choice, etc.

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Re: Operating temp

Post  wanczykj on Mon Feb 01, 2016 6:26 pm

Middle of the gauge is 195 degrees F.

I am running a 160 thermostat and running green anti freeze from O'Reiliy's.

I did start with 50/50 pre stone, but the car ran at the same temp as it is now.

Was thinking about upgrading to an after market water pump.


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Re: Operating temp

Post  whty8911 on Mon Feb 01, 2016 8:21 pm

GMs run hot. Most "LS" engines run between 200-210 normally. If you beat on it and it creeps to 220 then calms back down I wouldn't stress it too much. But depends on what you do to it, like road racing for example, I would be interested is seeing if temp continues to climb. Normal temp is 210, overheating is 230+. GM didn't leave much room.

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Re: Operating temp

Post  lsporsche on Tue Feb 02, 2016 8:44 am

What radiator and fans are you running?  Using high and low fan switch wires from the ls pcm?

And what altitude are you at?  When I drove my cts v (ls6) to an internship in Colorado I could hit 240 while street racing, never got near that down here near sea level.

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Re: Operating temp

Post  docwyte on Tue Feb 02, 2016 9:39 am

Hmm, that seems high. Mine runs 180F on the street with the RD/RH radiator and fan. On the track is another story, that's why I've added another auxiliary radiator.

However I'm at altitude and that makes a huge difference in water temps.

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Re: Operating temp

Post  Lemming on Tue Feb 02, 2016 11:58 am

The 5.3 in my Yukon XL runs right at 210 all the time.   Might creep up to 220 pulling the race trailer up hills.
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Re: Operating temp

Post  wanczykj on Tue Feb 02, 2016 6:00 pm

Yeah, this thing is running tooooo hot! Got up to 220 on the drive home today.

I am thinking about upgrading the water pump. Anyone do this on theirs? Any recommendations?

Not liking the high temp. It was only 70 outside today, and this summer it will hit 100 in Houston. I need to get the temp down to about 190.

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Re: Operating temp

Post  docwyte on Tue Feb 02, 2016 7:36 pm

What radiator and fan setup do you have? What thermostat?

Water pump won't make a big difference in temps...

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Re: Operating temp

Post  whty8911 on Tue Feb 02, 2016 7:45 pm

Doc is right. Chances are water pump isn't the issue. Circulation can be a problem but its one of the least likely options. More so its due to airflow, radiator size and thermostat option.

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Re: Operating temp

Post  wanczykj on Tue Feb 02, 2016 7:47 pm

I have an aftermarket radiator, am running two electric fans that are pushing 1700 CFM, and have a 160 thermostat in the car.

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Re: Operating temp

Post  wanczykj on Tue Feb 02, 2016 8:50 pm

Grrrr, after doing some research I think I may know what the issue is. A sales rep at O'Reilly's recommended I run pure antifreeze in the car.

Everything I have read says I should run 70/30 or 80/20 distilled water/antifreeze here in Houston. Had no idea antifreeze doesn't cool as well as water.

Will change things this week and see what gives.

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Re: Operating temp

Post  Arthropraxis on Tue Feb 02, 2016 9:20 pm

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This is how the late model gauge reads in Fahrenheit. Interesting about the water/AF ratio. I run 50/50 and in the summer heat, also 100 here all summer, my car ran around 212 or a smidge above in heavy traffic. The heat would drop back around 190ish with constant driving.
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Re: Operating temp

Post  docwyte on Wed Feb 03, 2016 8:47 am

Yeah, you shouldn't be running pure anti freeze. You should be running 50/50. Are your fans shrouded? Are you sure both are working and coming on "high" speed?

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Re: Operating temp

Post  wanczykj on Wed Feb 03, 2016 4:55 pm

The fans are shrouded and coming on high speed. Can't remember the exact settings but they are staggered at different temps below 200 degrees F.

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Re: Operating temp

Post  docwyte on Wed Feb 03, 2016 8:14 pm

What radiator are you using?

Try the 50/50 mix and report back...

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Re: Operating temp

Post  wanczykj on Wed Feb 03, 2016 8:25 pm

its an aftermarket radiator I purchased online. Can't remember the brand name. Going to run 80/20 mix. 80% water, 20% antifreeze and will let you know how things are.

No time to flush the system till Sunday, so it will be early next week for the report back.

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Re: Operating temp

Post  wanczykj on Sat Feb 06, 2016 8:33 pm

Well, after further digging it looks like I have a blown head gasket. Drained the radiator and found oil in the fluid.

Also leaking oil from the drivers side head so it looks like I'll be out of business for a while.

Gotta love your ride!

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Re: Operating temp

Post  erioshi on Sun Feb 07, 2016 10:54 pm

Ouch. At least you seem to have found the cause. Hopefully everything will be good after the gasket is dealt with.
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Re: Operating temp

Post  wanczykj on Wed Feb 10, 2016 6:44 pm

Well, after not knowing how long this rebuilt engine sat before I got it (it sat for a year and a half with me), I did the unthinkable and used a bottle of Blue Devil to stop the oil in the radiator, and a bottle of ring /piston sealer in the oil.

Since doing so, the car has not had a drop of oil in the Radiator fluid, is running in the 190-205 range, and has more power and is running smoother since I added these fluids to the oil and radiator.

Hope this does the trick!

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Re: Operating temp

Post  Rich L. on Thu Feb 11, 2016 3:06 pm

Might I suggest a bottle of injector cleaner in the fuel? And I think you can get a brightness booster for the blinker fluid... Wink

kidding! Glad to hear your issues are cleared up.
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Re: Operating temp

Post  wanczykj on Fri Feb 12, 2016 9:19 pm

What on/off temp are you setting for your fans?

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Re: Operating temp

Post  wanczykj on Fri Feb 12, 2016 9:21 pm

80 degrees out today, and my temps jumped 20 degrees on the drive home.

210 on the highway, 220 in traffic.

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Re: Operating temp

Post  docwyte on Sat Feb 13, 2016 4:13 pm

Still high compared to my car. If I'm moving, 180F...

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Re: Operating temp

Post  wanczykj on Sat Feb 13, 2016 4:21 pm

Doc,

My fans ARE NOT shrouded, thinking this a lot to do with the heat issue and the car not cooling well.

What fan set up are you running?

I have 12 inch fans (12V 80W) which are suppose to be rated at 1700 Cfm each. They take up pretty much all of the radiator and even hang a bit off the bottom.

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Re: Operating temp

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