Heat Issues - New to me 70 Chevelle - Page 9 - Chevelle Tech
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post #121 of 409 (permalink) Old Jul 14th, 17, 7:20 PM
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Re: Heat Issues - New to me 70 Chevelle

Quote:
Originally Posted by Bart_Swisher View Post
image only quote (from USMC Spike):
Bart, what bracket do you use to go from a large power booster to the smaller booster?
I have a smaller booster but no bracket. The studs mount opposite and differently.
I've seen a local guy with the same setup, but he didn't have a clue, as he bought
his Chevelle finished.

Thanks
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post #122 of 409 (permalink) Old Jul 14th, 17, 7:34 PM
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Re: Heat Issues - New to me 70 Chevelle

Quote:
Originally Posted by Kirk's67SS View Post
You could get Hard Lines from GrdUp
Chevelle Fuel Lines. 1962-1972 Chevelle Fuel Lines Parts.

or The Right Stuff I think

Like Road Roamer my car has the Braided Fuel Line from Mech Pump to Carb
and I put Water Pipe Insulation around it to keep it cooler
BEFORE



AFTER

Huhum....photobucket pics don't work anymore unless you pay them for the privilege to link your photos to sites like these.

'69 Malibu
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post #123 of 409 (permalink) Old Jul 14th, 17, 9:19 PM
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Re: Heat Issues - New to me 70 Chevelle

Quote:
Originally Posted by USMC_Spike View Post
Bart, what bracket do you use to go from a large power booster to the smaller booster?
I have a smaller booster but no bracket. The studs mount opposite and differently.
I've seen a local guy with the same setup, but he didn't have a clue, as he bought
his Chevelle finished.

Thanks
I used the 9" booster and master cylinder from Right Stuff Detailing. I ordered the whole 4 wheel disk brake kit. Everything bolted up perfectly. I didn't have to change anything.

There's nothing wrong with being stupid as long as you know you're stupid, it's when you're stupid and don't know it that you become dangerous.
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post #124 of 409 (permalink) Old Jul 14th, 17, 9:53 PM
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Re: Heat Issues - New to me 70 Chevelle

OK, finally got around to taking pictures of my fan and getting numbers. Mine is 9796134 19.5 " 1970 GTO fan. Here are the pics showing the clearance etc. Again this is with the Summit one piece 71 shroud. Hope this helps.
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There's nothing wrong with being stupid as long as you know you're stupid, it's when you're stupid and don't know it that you become dangerous.
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post #125 of 409 (permalink) Old Jul 15th, 17, 1:29 AM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

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Originally Posted by Bart_Swisher View Post
OK, finally got around to taking pictures of my fan and getting numbers. Mine is 9796134 19.5 " 1970 GTO fan. Here are the pics showing the clearance etc. Again this is with the Summit one piece 71 shroud. Hope this helps.
Thanks for the pics! At this point, I guess I am going to just try the 18" 7 blade fan I bought with the 2747 fan clutch. I may just try it in the stock 70 shroud and see if it clears. If not, I'll put on the 71 shroud and hope the fan is big enough to pull the air through the radiator.
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post #126 of 409 (permalink) Old Jul 15th, 17, 12:54 PM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

Ive read about people using foam tape to seal the shroud. Probably a dumb question but how do you seal around the shroud? Are they talking about the top and bottom? Using foam tape to take the shroud to the top plate so there are no gaps? Anyone have pics of this?
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post #127 of 409 (permalink) Old Jul 15th, 17, 1:22 PM
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Re: Heat Issues - New to me 70 Chevelle

This is where I mounted my fuel filter. I still run the bronze filters in the carburetor too.


71 Malibu, Cottonwood Green, 396 BBC, AutoGear M22W 4 speed, 12 bolt 3:55 posi.
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post #128 of 409 (permalink) Old Jul 15th, 17, 1:32 PM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

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This is where I mounted my fuel filter. I still run the bronze filters in the carburetor too.

Can't see it because its a photobucket pic.
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post #129 of 409 (permalink) Old Jul 15th, 17, 4:15 PM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

So I feel a bit dumb. lol I got the fan in today.....

I went out and got some 5/16-18X3/4 Hex Flange Bolts. I read somewhere (and wrote it down) that I needed 5/16-18X5/8 flange bolts but my local shop didn't have 5/8", they only had 3/4". First, are these the bolts to connect the fan clutch to the fan? If so, what do I use to bolt the fan clutch to the water pump pulley?

Right now, my flex fan has a spacer and connects right to the pulley. From what I can tell, now its the fan clutch that will connect to the pulley so that means the bolts I have (that were used with the spacer and flex fan) won't work, they would be too long. Does anyone know what size bolts I need for this or is that what the bolts above are for? And if that's the case, what size bolts would I need to connect the fan to the fan clutch?

And last, I assume the numbers (and part # sticker) on the fan face the engine, not the radiator...correct? It seems the fan clutch fits on the fan better this way (the clutch has a little more clearance from the fan fins).
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post #130 of 409 (permalink) Old Jul 15th, 17, 8:07 PM
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Re: Heat Issues - New to me 70 Chevelle

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Originally Posted by ghoticov View Post
So I feel a bit dumb. lol I got the fan in today.....

I went out and got some 5/16-18X3/4 Hex Flange Bolts. I read somewhere (and wrote it down) that I needed 5/16-18X5/8 flange bolts but my local shop didn't have 5/8", they only had 3/4". First, are these the bolts to connect the fan clutch to the fan? If so, what do I use to bolt the fan clutch to the water pump pulley?

Right now, my flex fan has a spacer and connects right to the pulley. From what I can tell, now its the fan clutch that will connect to the pulley so that means the bolts I have (that were used with the spacer and flex fan) won't work, they would be too long. Does anyone know what size bolts I need for this or is that what the bolts above are for? And if that's the case, what size bolts would I need to connect the fan to the fan clutch?

And last, I assume the numbers (and part # sticker) on the fan face the engine, not the radiator...correct? It seems the fan clutch fits on the fan better this way (the clutch has a little more clearance from the fan fins).

I believe you will need fine thread...5/16"-24 bolts.

Here's a pic of my fan attached which is the same fan you have.

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post #131 of 409 (permalink) Old Jul 15th, 17, 10:56 PM
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Re: Heat Issues - New to me 70 Chevelle

I pulled the shroud away from the radiator and then applied 3/8" foam (from Home Depot) all around the perimeter. Place back against radiator, all done. Before you buy the foam measure (or guesstimate) the gap between the shroud and radiator. Buy foam slightly thicker than your measurement so it will compress against radiator.

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post #132 of 409 (permalink) Old Jul 16th, 17, 1:37 AM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

Quote:
Originally Posted by Road Roamer View Post
I believe you will need fine thread...5/16"-24 bolts.

Here's a pic of my fan attached which is the same fan you have.

How long of a bolt? 3/4"???

So I assume the 5/16-18X3/4 are for attaching the fan blade to the fan clutch? Do you think it matters that I'm using 3/4" long instead of 5/8". I screwed them into the fan clutch and they seem to work.
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post #133 of 409 (permalink) Old Jul 16th, 17, 1:39 AM Thread Starter
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Re: Heat Issues - New to me 70 Chevelle

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Originally Posted by OO52 View Post
I pulled the shroud away from the radiator and then applied 3/8" foam (from Home Depot) all around the perimeter. Place back against radiator, all done. Before you buy the foam measure (or guesstimate) the gap between the shroud and radiator. Buy foam slightly thicker than your measurement so it will compress against radiator.
Gotcha... and does it go all the way around the shroud? Top, bottom and sides? or Just top and bottom?
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post #134 of 409 (permalink) Old Jul 16th, 17, 11:34 AM
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Re: Heat Issues - New to me 70 Chevelle

Where ever there is a Gap between the Shroud and the Rad
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post #135 of 409 (permalink) Old Jul 16th, 17, 12:56 PM
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Re: Heat Issues - New to me 70 Chevelle

I think I read you have heat issues at idle and at highway speeds. If this is correct the fan wont solve highway speed heat issues. Driving down the road at higher speeds you dont even need a fan. 60 mph air flows plenty thru a radiator to cool it if its efficient.

I use that same flex fan on my 496 and have no heat issues. If it was me I would look at the radiator and install a high flow water pump. IMO and your hot 100 degree temps in your area I would install a good double 1.25 row aluminum radiator.
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