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Username Post: Draining Coolant 235ci        (Topic#343350)
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-16-17 02:09 PM - Post#2681835    

Greetings Chevy Brethren,

I've seen some slick coolant drains installed on 235 blocks when guys have them apart.

Unfortunately, my 235 does not not have a block drain. When it's rebuild time I will definitely add one.

In the meantime, I'm wondering if anybody knows of a way to get the coolant level below the head without making a mess? Draining the radiator does not drain the head.

If you're wondering why I want to drain the coolant out of the head, I'm planing on pulling it this weekend.

Thanks for any tips.
Cheers,

-Marcus in Portland Oregon



 
bobschevytrucks.com Ecklers Chevy Trucks LMC Trucks
Bel Air kiwi 
"2nd Year" Silver Supporting Member
Posts: 3670
Bel Air kiwi
Loc: New Zealand
Reg: 04-24-14
03-16-17 11:12 PM - Post#2681908    
    In response to Marcus62c10

Hi Marcus. You can pull the thermostat and suction pump it out, or take out a welsh plug that is easy to get at knock that out.

Cheers kiwi

48 3100 RHD, 51 Deluxe 4DR RHD, 51 Bel Air parts car, 52 Bel Air P-Glide LHD. Others 23T, 32 Tudor, 58 Edsel pacer 4DR HDT, 79 F250 351C RHD. 69,70,82 Capri. No mobile, no TV, and no Jap cars.

And when it was laid to waste, they called it peace.


 
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-17-17 09:09 AM - Post#2681965    
    In response to Bel Air kiwi

  • Bel Air kiwi Said:
Hi Marcus. You can pull the thermostat and suction pump it out, or take out a welsh plug that is easy to get at knock that out.

Cheers kiwi



Hi Kiwi, thanks for the idea.
I'll suck it out the thermostat hole...duh!
cheers brother!




 
raycow 
Honored Member
Posts: 26931
raycow
Loc: San Francisco, CA
Reg: 11-26-02
03-18-17 09:23 AM - Post#2682081    
    In response to Marcus62c10

When you said your 235 "does not not have a block drain" do you mean it doesn't have a drain cock, or do you mean it doesn't even have the hole (possibly with a plug in it)?

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-20-17 09:31 AM - Post#2682395    
    In response to raycow

Hi Ray,
I meant there is no petcock. Sounds like my understanding is off? I thought guys with petcocks in their 235 blocks had drilled and tapped. Are you saying that there is a drain with a threaded plug?
Thanks for chiming in,
-Marcus in Portland Oregon

FYI for anyone reading down the line, I ended up foregoing pumping coolant out of the thermostat housing and just pulled the top of the lower radiator hose off the water pump and aimed it at a clean bucket immediately below. It was a reasonably tidy and quick solution.



 
raycow 
Honored Member
Posts: 26931
raycow
Loc: San Francisco, CA
Reg: 11-26-02
03-20-17 10:05 AM - Post#2682398    
    In response to Marcus62c10

http://www.jims59.com/59impala/images/0820a MotorLt...

Start at the rearmost exhaust port and go straight down until you see the drain cock. Every one of these engines I have ever seen has this hole. If yours doesn't have a drain cock in there it should have a pipe plug.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-20-17 10:56 AM - Post#2682405    
    In response to raycow

That's fantastic!
Thanks for the detail Ray.
Much appreciated.
-Marcus



 
raycow 
Honored Member
Posts: 26931
raycow
Loc: San Francisco, CA
Reg: 11-26-02
03-20-17 01:44 PM - Post#2682430    
    In response to Marcus62c10

So which does yours have - a drain cock or a plug?

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-21-17 02:38 PM - Post#2682637    
    In response to raycow

  • raycow Said:
So which does yours have - a drain cock or a plug?

Ray



Hey Ray
Yup, it does have a plug!
The accelerator spring is attached to it; I didn't look closely enough to notice the threads. Previously thought that was just a post for the spring! Nope!
Cheers, next time I need the coolant out I'll try it out

-Marcus



 
raycow 
Honored Member
Posts: 26931
raycow
Loc: San Francisco, CA
Reg: 11-26-02
03-21-17 04:46 PM - Post#2682658    
    In response to Marcus62c10

This is the first time I have heard of anyone connecting a spring to that plug, but if it was the most convenient spot, I guess there is no harm done. If you ever need to remove that plug in the future, that would be a good time to replace it with a normal drain cock. It should be standard 1/4" NPT thread, the same as the radiator drain.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Marcus62c10 
Forum Newbie
Posts: 42
Marcus62c10
Age: 38
Loc: Portland Oregon
Reg: 10-06-16
03-22-17 09:35 AM - Post#2682749    
    In response to raycow

Thanks for the detail on the threads Ray; I'll grab a drain cock next time I'm at the hardware store.

Ya, throttle works fine so I guess that's a reasonable place to hang the spring off of!

Cheers, thanks for the input

-Marcus



 
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