High engine coolant temp

85Punisher · Sep 29, 2019

Hi guys,

I have been fighting with my engines coolant temp being pretty high for the last season now. It gets up to 215 deg at times while just sitting idle. I have a sbf 306 with AFR aluminum heads, Anderson N21 cam, Edelbrock performer RPM intake, Holley SS EFI System. I’m running 180 thermostat which I just replaced. It had a 190 in it. I’m running aluminum 3 core radiator, Mishimoto dual 12” fans with aluminum shroud. The fans claim to be 900 cfm each. They are running off a stat and relay that is set to turn on around 180. The fans never turn off ever but the system still stays around 190 -215 degrees. My timing is at 15 deg after TDC. The sniper also controls timing.

I haven’t been running it much this year because of this issue. I don’t want to chance messing up my heads. Any ideas??

Has anyone used these fans from Mishimoto?

The fans are the only thing I can think that would cause this issue.

Steel1 · Sep 30, 2019

Just throwing out a few ideas:
Check for leaks.
Condition/age of water pump and radiator.
Are the fans pushers or pullers ?
900cfm each seems a little underpowered to me , I believe the popular contour fan is around 3000cfm.

85Punisher · Sep 30, 2019

Steel1 said:
Just throwing out a few ideas:
Check for leaks.
Condition/age of water pump and radiator.
Are the fans pushers or pullers ?
900cfm each seems a little underpowered to me , I believe the popular contour fan is around 3000cfm.

Thanks for the reply. The radiator, water pump and fan setup are only a season old with maybe 500 miles on them. There are no leaks. The fans are setup to push air from the engine side of the radiator towards the front of the car.

I did see the contour fan setup. I am wondering if the fans are the problem as you pointed out. I don’t see any other faults. I may give them a try. Thanks

General karthief · Sep 30, 2019

You can't effectively push air through the radiator from the engine compartment, you have a pusher fan on the wrong side of the radiator.

90sickfox · Sep 30, 2019

Fans should pull air from the front through the radiator. I run Contour fans on my 331 turbo car with a 192 thermostat. Temps stay between 198° and 210° after spirited driving in 100° weather.

LX1993 · Sep 30, 2019

Those fans are crap. I don't think it's a coincidence you started having problems after installing them. Rule of thumb is 2500-3000 minimum cfm for a V8. Pick up a decent set of fans. Most aftermarket fan manufacturers are full of s***. Don't look at the cfm rating, look at the amp draw.

General karthief · Sep 30, 2019

LX1993 said:
Those fans are crap. I don't think it's a coincidence you started having problems after installing them. Rule of thumb is 2500-3000 minimum cfm for a V8. Pick up a decent set of fans. Most aftermarket fan manufacturers are full of s***. Don't look at the cfm rating, look at the amp draw.

You talking about contour fans?
and why would you not look at cfm?

85Punisher · Sep 30, 2019

It’s definitely settled then haha. Thanks for the replies guys. I just picked up a Contour dual fan. I should be doing a lot better with these running. For $25 it’s already a better option.

85Punisher · Sep 30, 2019

General karthief said:
You talking about contour fans?
and why would you not look at cfm?

I’m assuming he was referring to the Mishimoto fans? They are under powered.

General karthief · Sep 30, 2019

85Punisher said:
I’m assuming he was referring to the Mishimoto fans? They are under powered.

i hope so.

LX1993 · Oct 1, 2019

Yep, was referring to the Mishmoto fans, Contour fans are great, especially for what they cost. Put an amp meter on one or a Taurus fan for that matter. Ten amps for every 1000 cfm is a decent rule of thumb. Cfm ratings on aftermarket fans are all over the place & often considerably optimistic. Example: two 16" fans are rated at 2500 cfm, one has an amp draw of 28 & the other 12. Which one do you think will be closer to producing the rated cfm?

90sickfox · Oct 2, 2019

You'll like the contour fans. I made brackets from a thick exhaust hanger with the pre drilled multiple holes...the kind the sell at local part stores. Just bent it and cut it with a grinder. Drilled holes in the plastic so it aligned with the holes in my radiator top channel and used nut clips. 10mm nuts and bolts....one day I'll find that socket again.

I could've gotten the metal cheaper at Lowes or Home depot....but I already had the hangers.

85Punisher · Oct 2, 2019

So I was thinking of doing two 30 amp relays for my Contour fans. Do you think I need to go bigger than 30 amp?

LX1993 · Oct 2, 2019

30 amp would be minimum. If i recall correctly they pull close to that each. I'd probably go with a couple 40 or 50 amp relays. The larger the relay, the larger the contact surface area, which helps dissipate heat & better distribute the electrical "load".

85Punisher · Oct 2, 2019

LX1993 said:
30 amp would be minimum. If i recall correctly they pull close to that each. I'd probably go with a couple 40 or 50 amp relays. The larger the relay, the larger the contact surface area, which helps dissipate heat & better distribute the electrical "load".

Thanks. I was thinking the same thing. I’ll do two 40’s.
Would you recommend using that resistor that’s on it? If I did I’d probably have to replace. It’s purdy rusty haha

LX1993 · Oct 2, 2019

Replace it.

marcelo · Oct 6, 2019

Mishimoto duals are not enough....Contour Fans are great.. !!!

High engine coolant temp

85Punisher

Member

Steel1

Mustang Master

85Punisher

Member

General karthief

wonder how much it would cost to ship you a pair

90sickfox

Wasn't a pretty sight...and I've got big hands

LX1993

General karthief

wonder how much it would cost to ship you a pair

85Punisher

Member

85Punisher

Member

General karthief

wonder how much it would cost to ship you a pair

LX1993

90sickfox

Wasn't a pretty sight...and I've got big hands

85Punisher

Member

LX1993

85Punisher

Member

LX1993

marcelo

Active Member

Similar threads

High engine coolant temp

Member

Mustang Master

Member

wonder how much it would cost to ship you a pair

Wasn't a pretty sight...and I've got big hands

wonder how much it would cost to ship you a pair

Member

Member

wonder how much it would cost to ship you a pair

Wasn't a pretty sight...and I've got big hands

Member

Member

Active Member

Similar threads

Privacy & Transparency

Privacy & Transparency