DIY coolant by-pass?

cummins724 said:
Heres a pic of my pressure regulator. You can buy one at any hardware store, just tell them a pressure regulator valve from a boiler. Hose goes from the plate on the back of the head sraight to here, then dumps into the upper radiator hose. I can get more pics if you need them TJ.
Click to expand...

any more specs on that regulator? ill try the local parts houses and stuff to find one, i'd like to do it this weekend since ill have the tranny out and will be right there at the back of the motor.
 
Just about any plumbing supply house, or heating supply house(look for oil heating supplies) can get you what you need. most are 3/4inch)I have come across a coule 1/2inchers though), and preset at 30PSIG, and alot are adjustable up to around 150PSIG.

Its a Boiler Pressure Relief Valve...



Chase
 
I've been looing online this afternoon at relief valves....just Google 30psi pressure relief valves....the options are endless.
I found a nice looking stainless model that's 1/2" NPT and adjustable 20-150 psi...sent an email on pricing.

After looking into this and thinking about it.....I'm all about building my own kit.
Going to Aeroquip tomorrow to look at fittings an hose.
 
UNBROKEN said:
I've been looing online this afternoon at relief valves....just Google 30psi pressure relief valves....the options are endless.
I found a nice looking stainless model that's 1/2" NPT and adjustable 20-150 psi...sent an email on pricing.

After looking into this and thinking about it.....I'm all about building my own kit.
Going to Aeroquip tomorrow to look at fittings an hose.
Click to expand...

Keep us posted... I've been thinking about making my own too and I know what ever you find will be the cleanest option available short of buying Opie's.
 
Some of the adjustable regulators from WATTS are not rated for hot water. Just be sure to get the right ones.
 
Unbroken, those second valves look good....

I dont know how much flow you would need to bypass, but, those only bypass 1.17gpm in the 25-50 PSI range..., but, I agree, looks like a super clean install...
 
I agree..it's not much flow. One could run a bigger valve in that style...just use a couple more fittings to reduce the line back down to 1/2"

Anyone know what kind of flow is needed ?
 
I am interested in this as well. What flow do you need and what size fitting do you need for the head. I like the second valve as well for a clean install.:pop:
 
I would imagine somewhere around 30PSI should be sufficient to keep the freeze plugs in place, IIRC, thats what the bypass kit is popping off at...

You figure, the rad cap is 15-17PSI.... thats where your cap will start trying to bleed off pressure....

BUT, thats in the radiator..

The t-stat becomes the bottle neck, and now, you may be bleeding pressure in the rad, but, its not bleeding out of the block fast enough....

POP, goes the freeze plug.. .and all your coolant...

AT least, as far as I can discern, never popped one....

Chase
 
UNBROKEN said:
Here's a couple I'm looking into.
I was wrong...it's 25-500 psi
http://straval.com/catlist-relief-valves/rvc-04

What about this one...would be a super clean install....you can order them set to your pressure.
http://straval.com/catlist-relief-valves/rvi-05?size_id=21#size_table

I'm really liking the 2nd on for a clean, compact install.
Click to expand...

Our trucks have Radiator caps rated at 16psi. I would think that you will want a relief that is rated to blow off at 17-18psi. I adjusted my relief valve to open right after my thermostat opens. When I first adjusted it, my truck wouldn't go over 140* driving down the road. That tells me that the relief valve is opening up to early, meaning that it was adjusted to less than rad cap pop off pressure. I'm no pro, just a suggestion. By the way, I saw your truck in DP....Awesome!!!!!:rockwoot:
 
getblown5.9 said:
any more specs on that regulator? ill try the local parts houses and stuff to find one, i'd like to do it this weekend since ill have the tranny out and will be right there at the back of the motor.
Click to expand...

I checked it, but there are no numbers on it. Sorry man. I know that Enterprise sells the plates seperately, maybe they sell the pressure relief seperate?
 
You know, I dont see why you couldnt use the next size down(pressure wise), and set it say, between 20-25psi, and get the 1.37gpm(if that is enough)... I would venture to guess, as long as it starts to bleed off at that point, it will not let pressure build up enough in the cooling passages, to puke that freeze plug....


Chase
 
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