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How to make yer own coolant expansion tank


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36 replies to this topic

#1 Jayden71

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Posted 24 July 2009 - 03:41 PM

With the weather being pretty hot right now, close to 100 every day, I thought my 521 might need an expansion tank next to the radiator. I don't have any problems overheating but, this idea cannot hurt anything. To have the coolant go into a tank instead of on the ground is better in my opinion.

Very few items are needed for this little project...
A drill
A few zip ties
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3/8" tubing
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I used a 1.75 liter jug. Anything larger may not fit in the space next to the 521 rad.
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Next thing I did was drill a hole in the jug lid, slightly smaller than the tubing
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On the end of tubing that is going into the jug I cut an angle piece out just to be sure it sucks out coolant.
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I inserted tube into jug on one end and the small pipe under rad cap on other end. I did not use the small clamp, used a zip tie instead.
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Secured tank with one tie at the top and I may put one on the bottom but, it fits pretty snug in there so we will see what happens.
Before
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After:)
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Total time for install was meybe 15 minutes. After install I drove it around for 20 minutes and it seems pretty secure. Total cost including the lemonade jug was $6. :)
I decided to leave the labels on the jug, my Datto likes lemonade.:D

I'm a witless bastard.


#2 datzenmike

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Posted 24 July 2009 - 04:50 PM

Unless you have the proper rad cap you will have to manually empty the catch can into the rad when it cools. The proper rad cap allows the liquid to siphon back into the rad as it cools and contracts. Starting with the '78 620, coolant recovery was used, so a '78 cap should fit the bill for your rad. Cap # 21430 C0500

Still it's a great idea to prevent waste. I did this on my 521 back in the day.

Edited by datzenmike, 24 July 2009 - 04:58 PM.


#3 nismo dr

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Posted 24 July 2009 - 09:03 PM

I've seen a lot of old hot rods with jack daniels bottles for coolant tanks - pretty cool. not that limeade doesn't rock - just sayin

"If in doubt, flat out" Colin McRae

 


 

 

 


#4 izzo

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Posted 24 July 2009 - 09:19 PM

like aid is the shit!


glad to see other people like it
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#5 ggzilla

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Posted 24 July 2009 - 11:52 PM

Fanta Orange 21oz bottle is good for 2 more HP.
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#6 MikeRL411

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Posted 25 July 2009 - 06:30 AM

A beer can works fine. Run a piece of wire through the pop tab and hook to any available bolt hole or bolt body. Net cost zero, and you got to empty the can.

#7 Jayden71

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Posted 25 July 2009 - 07:39 AM

Fanta Orange 21oz bottle is good for 2 more HP.


:lol::lol:

1 liter Mountain Dew bottle must be good for 5hp!!

I'm a witless bastard.


#8 ggzilla

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Posted 25 July 2009 - 09:28 AM

I heard some are using Mt Dew but I worry about corrosion. Fanta is the tried and true...

Note the FES (Fanta expansion system) on this Datsun:
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Here today gone tomorrow

#9 moparvwfreak

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Posted 25 July 2009 - 05:52 PM

now thats Ratsun right there. i should do that for my 73 once i fix it.
#655321

"Shiny! Lets be bad guys!"

I have seen the way of the trunk, and it is good.

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#10 hessianben

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Posted 25 July 2009 - 10:41 PM

haha good form....

mine's made from a Sauza tequila bottle! only some tequila left...:P

#11 datzenmike

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Posted 26 July 2009 - 07:28 AM

..... only some tequila left...:P


Anti-freeze!

#12 hessianben

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Posted 26 July 2009 - 08:31 AM

mmmmmmm.....



....stingy:p

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#13 phiz

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Posted 26 July 2009 - 09:44 AM

Here's the puke can on my Z:
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Early '74 RLS30 Rustomod
'73 PL620 Creampuff
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There's no substitute for cubic dollars!

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#14 yello620

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Posted 26 July 2009 - 11:32 AM

Phiz, I heard about that energy drink a while back but never have seen it on the shelves around here.

On the coolant bottle, I went a little different route with mine. I found one from a 91 honda accord, took the bracket too. It is mounted in factory holes to the core support, by drilling two new holes in the bottle bracket and using a couple of washers as spacers to keep from smashing the rib/bump in the back of the honda bracket. Bumps can be seen in the second pic.
Couple of pics...
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I was more interested in an appearance that looked factory for mine.:cool:
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Jason

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#15 ggzilla

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Posted 26 July 2009 - 11:57 AM

1979-1982 Datsun 210 bottle is similar to the Honda setup, but keeps it all Nissan. And has a square shape fitting for 1960s and 1970s Datsun.
Here today gone tomorrow

#16 Guest_DatsuNoob_*

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Posted 10 August 2009 - 02:20 AM

I bought one of those "Venom" energy drinks the other day, and was surprised at how sturdy the aluminum bottle was for being a disposable. They're very thick. I may make one out of it.

#17 fisch

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Posted 10 August 2009 - 06:49 AM

I bought a home made one of of ebay, painted it and put it on the front bumper! But if I were going to run a bottle or can, dude, it has to be a Japanese soda or beer!!!

Get creative people!


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#18 bonvo

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Posted 16 August 2009 - 12:49 PM

this is what im gonna use for mine
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the first rule of Ratsun is you don't talk about Ratsun... no wait thats fight club.....


....the first rule of Ratsun is PICS OR BAN! :fu:



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#19 MikeRL411

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Posted 18 August 2009 - 12:52 PM

Pokari "Sweat" would be sweet [pun intended].

#20 72240z

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Posted 18 August 2009 - 01:36 PM

haha good form....

mine's made from a Sauza tequila bottle! only some tequila left...:P


Anti-freeze!



You know liquor is the home treatment for antifreeze ingestion? lol Just fyi.


Cudos to fisch too, I agree and thats my plan. To get my girls fam to send me some crazy shit no one here will have seen let alone have.

Edited by 72240z, 18 August 2009 - 01:40 PM.

Didn't build it? It's not yours....
Jay's s30 project

DSC02599-1.jpg
my Ebay store