Cooling 101/setup that keeps old school bbc/sbc motors nice & cool! - Page 3 - Chevelle Tech
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post #31 of 75 (permalink) Old Jun 8th, 14, 1:02 AM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Bump

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
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post #32 of 75 (permalink) Old Jun 12th, 14, 10:22 PM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Quote:
Originally Posted by swheaton View Post
bump
=============================

its that time of yr!

Bump!

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #33 of 75 (permalink) Old Jun 16th, 14, 12:21 AM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

its that time of yr!

Bump!

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #34 of 75 (permalink) Old Jun 22nd, 14, 5:40 PM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

its that time of yr!

Bump!

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #35 of 75 (permalink) Old Jun 22nd, 14, 8:04 PM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

This really works. Can we just make it a sticky?

71' Convertible
468 from VortecPro, TH350, Ford 9" 3.50 Truetrac
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post #36 of 75 (permalink) Old Jun 23rd, 14, 6:09 PM
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Re: Cooling 101/a reliable system that cools bbc/sbc street perf motor

Quote:
Originally Posted by al1950 View Post
thanks alot,
Do you know if there is a clutch fan unit I can buy to put on my stock 66 SS 325 hp, with plastic shroud.?
Allan
If you do not currently have a "clutch fan" setup, you may want to research.

The factory "clutch fan" for 1966 (1964-1968?) used a 5-blade fan. The clutch is different than the clutch used for the "772" 7-blade fans (1969 and up?).

Hayden offers a HD clutch for the later fans, but IIRC, they don't offer HD for the earlier 5-blade version.

Even though I had a Short Water Pump setup on my '66 396, I still added the "772" 7-blade fan and Hayden HD clutch. I used this all with a stock (reproduction) '66 fan shroud. The 772 fan fit in the stock shroud.

Of course, I also was using a BeCool aluminum radiator, but pretty sure this would still work with a stock radiator.

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post #37 of 75 (permalink) Old Jul 3rd, 14, 9:25 PM
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Allan
 
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Hey Scott, I have done most of your improvements, except the clutch fan and seal the shroud. but here is what happened today,,
just road tested my newly installed heater bypass valve

drove till reached oper temp with valve closed.
no overheat while rolling.
sat 5 minutes in drive thru, temp light came on.
opened valve , light went out.

drove home with valve open. no temp light
let idle in heat 15 minutes, then temp light came on, drove 1/2 mile it went off. no leaks and coolant level is ok.


ps
today florida ambient temp is 91, with heat index about 100f.
I put the valve on the 5/8 hose from intake to heater.
66 SS 325 hp. 4 sp, non A/C car, has complete new cooling system. that I have been running for a few months with no issues. has 160f hiflow t stat.
appreciate any ideas on solution for this problem?
is it just to hot outside for a car like this to idle with overheating?
thanks
Allan
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Old Jul 4th, 14, 8:28 AM
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post #38 of 75 (permalink) Old Jul 6th, 14, 12:31 AM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Quote:
Originally Posted by al1950 View Post
Hey Scott, I have done most of your improvements, except the clutch fan and seal the shroud. but here is what happened today,,
just road tested my newly installed heater bypass valve

drove till reached oper temp with valve closed.
no overheat while rolling.
sat 5 minutes in drive thru, temp light came on.
opened valve , light went out.

drove home with valve open. no temp light
let idle in heat 15 minutes, then temp light came on, drove 1/2 mile it went off. no leaks and coolant level is ok.


ps
today florida ambient temp is 91, with heat index about 100f.
I put the valve on the 5/8 hose from intake to heater.
66 SS 325 hp. 4 sp, non A/C car, has complete new cooling system. that I have been running for a few months with no issues. has 160f hiflow t stat.
appreciate any ideas on solution for this problem?
is it just to hot outside for a car like this to idle with overheating?
thanks
Allan
=================

Allan,using the fan clutch i suggested you install along with sealing the airgap between fan shroud and rad core with everything else i rec you do too are all very important to do all together at the same time to improve airflow/cooling thus reducing engine temp.

If after you do everything i suggested in my earlier post to you (including installing a proper for you yr car with Ac or Hd cooling new clutch fan with hayden thermal fan clutch & sealing fan shroud to rad core ) and everything elese i suggested you do too and the motor still run hots after doing all that PM me with temp temp in traffic and at cruise inc outside temp at the time too & we will go from there.

But if you do everything just like i suggest you do you motor should run much cooler and stop playing games with the bvalve you installed in was it a heater hose,remove it and setup you cooloing system properly like i rec and your problems with be gone.

Keep doing the same things without doing everything i suggested & you will keep getting the same result being what you say is a hot running motor.

May also be a good idea to verify engine temp in head where GM engineers installed temp sender in 69 & newer old school bbc/sbc motors using a hand held digital temp gun like most AC/Rad shops have on hand these days for quick check of engine temp to ensure your motors running as hot as you think it is.

Good luck.

Scott

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #39 of 75 (permalink) Old Jul 6th, 14, 9:59 AM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

thanks Scott
will do those things and let you know
ps I put the valve in 5/8 line from manifold to shut off flow to heater core,
reason the radiant heat from the hot core adds to much heat to the cabin on these 100 f florida days and every little bit of heat reduction in the cabin means a lot to calming down the interior heat level.
when the valve is closed it is noticeably cooler in the car.
thanks
Allan
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post #40 of 75 (permalink) Old Jul 7th, 14, 12:17 AM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Quote:
Originally Posted by al1950 View Post
thanks Scott
will do those things and let you know
ps I put the valve in 5/8 line from manifold to shut off flow to heater core,
reason the radiant heat from the hot core adds to much heat to the cabin on these 100 f florida days and every little bit of heat reduction in the cabin means a lot to calming down the interior heat level.
when the valve is closed it is noticeably cooler in the car.
thanks
Allan
=======================

Oh,ok ,now it makes sence why you installed a valve to shut down coolant to the heater core.

Good luck.

Scott

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #41 of 75 (permalink) Old Jul 7th, 14, 1:39 PM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Will this all apply to a 72 Chevy truck with a 260 HP crate motor with the exception of the long water pump ? I have replaced the stock radiator with a 4 core aluminum Champion radiator and a stock clutch fan ,dont know if the fan was the heavy duty one though .We installed Vintage Air and the truck will run hot in traffic if slow or just idling but runs normal temp on the open road . I also dont know which thermostat was used but plan on getting the one you have recomended and change it ASAP.
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post #42 of 75 (permalink) Old Jul 7th, 14, 2:02 PM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Also all parts places suggest a different fan clutch for a 350 but if Im reading this right you suggest the 2747 one ,correct ?
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post #43 of 75 (permalink) Old Jul 14th, 14, 2:22 AM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

I have a question will the chevy 772 fan and the hayden hd clutch work on a 1972 oldsmobile vista cruiser? im thinking it will because its GM. He is currently running a 4core new radiator and a direct fan no clutch and its a FLEX 17 inch fan. The car has a new 455 with headers very mild cam and timing is set at 15 and 31 total. Its running at 185 in 90 degree weather and when at a stop light it creeps up to 200 to 205 is this normal? do you think he would benefit from your combo? Any help would be great
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post #44 of 75 (permalink) Old Jul 14th, 14, 3:59 PM
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

So from what have I have read if install the 772 fan with the hayden thermal clutch on my 67 396 that has air conditioning as well as a four core radiator and the factory shroud that it will fit and work. I also have the short water pump.
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post #45 of 75 (permalink) Old Jul 14th, 14, 8:34 PM Thread Starter
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Re: Cooling 101/setup that keeps old school bbc/sbc motors nice & cool

Quote:
Originally Posted by PHX396 View Post
So from what have I have read if install the 772 fan with the hayden thermal clutch on my 67 396 that has air conditioning as well as a four core radiator and the factory shroud that it will fit and work. I also have the short water pump.
==============================

" So from what have I have read if install the 772 fan with the hayden thermal clutch on my 67 396 that has air conditioning as well as a four core radiator and the factory shroud that it will fit and work. I also have the short water pump"

Chis,you failed the test big time!!!!/LOL!!!!!

Look below where i just cut and pasted the 1st rec of my initial post on pg-1 of this post where it stats what cars my rec fits.

It's same basic setup for older chevelles like your 67too but you need to buy correct parts/clutch fan/fan clutch/shroud/w-pump etc for you car yr/motor with ac ofr fan with not have peopr spacing and or aln in shroud or proper distance from rad core either.

Read notes-1 & 2 in which i pasted below for you to read thats the 1st rec in my post,i dont see anywhere i say it specifically covers your 67 parts wise which it doesnt,i stated 69-72 chevelle only because clutch fan,fan clutch,radiator,shroud,w-pump etc are diff on your older 67 chevelle then 69-72 chevelles i am specifically targeting here.

Good luck.

Scott

1) MY REC UPGRADES TO GM'S STOCK CLUTCH FAN COOLING SYSTEM THAT SIGNIFICANTLY INCREASE ITS COOLING EFFICIENCY ARE AS FOLLOWS:

NOTE-1:THIS ASSUMES YOU ALREADY HAVE GM'S MATCHED STOCK 772 OR = CLUTCH FAN AND SHROUD SETUP USED ON 69-72 SBC/BBC CHEVELLES WITH AC OR HD COOLING.

NOTE-2:MY SAME REC'S WORK TO REDUCE ENGINE TEMP ON OLDER GEN CHEVELLES TOO BUT YOU HAVE TO KEEP MIND A DIF CLUTCH FAN,SHROUD,FAN CLUTCH,SHORT W-PUMP ARE USED ON 68 & OLDER GEN CHEVELLES/MOTORS SO KEEP THAT IN MIND WHEN BUYING THOSE PARTS TO INSTALL.

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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