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Heat Exchanger Hose

J

jubilee

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"Captins, Looking for feedbac

"Captins, Looking for feedback on using a formed hose from Crusader vs ShieldsflexII between circulating pump to hex the 1 7/8" hose. I'm replacing all the other hoses with ShieldflexII. Also any info on antifreeze on what spec's to look for."
 
"I replaced mine on both engin

"I replaced mine on both engines with the Shields hose. Engine coolant, I used Preston 50/50 pre-mix with Redline water wetter added to it."
 
I use Prestone Low Tox propyle

I use Prestone Low Tox propylene glycol antifreeze. Buy it at auto parts store. It is not toxic like ethylene glycol (normal auto antifreeze). I use tap water for mix but we have very soft water. If you have hard water use distilled water.
 
"I went the other way with the

"I went the other way with the Hex hose. The crusader formed hose fits a bit better up front, mine's been on now since 1999. Either works, though. I don't use anti-freeze, can't help there."
 
"I just did this on both my 45

"I just did this on both my 454's. The formed hose is THE way to go. On the port side, I used the Shields II as well but access was a lot easier than the starboard side.

No way, no how could I get the Shields hose to fit on the starboard side so I used the formed hose instead. I would have done that in the first place but didn't even know it was an option.


Bob"
 
"Tom:

The only "spec&#3

"Tom:

The only "spec" reference I could find was to the GM DEX-COOL spec. All the service literature I've seen calls for an EG-based product when freeze protection is required. I'm sure all the national brands are adequate. The 100% bottles are the way to go, if you can find them."
 
Dex cool will not protect sold

Dex cool will not protect solder. It is designed for cast iron and aluminum. I ran it in a car with copper brass radiator and had leaks in solder joints within one year. I later read in a trade publication Dex cool should only be used in cars with aluminum radiator.
 
"That's ironic for the rec

"That's ironic for the recommendation for DEX-COOL comes straight from the Crusader Owner's Manual (circa 2003). My limited knowledge of the DEX issue shows it is a compatibility issue with the plastics in the gaskets, not any metals in the cooling system.

Last time I checked, the heat exchangers are still copper based metal alloys which are typically soldered/brazed at the joints. I'm no chemist but it seems hard to believe something compatible with cast iron and aluminum wouldn't work well with a copper alloy. The plastics compatibility is above my level.

Independent of the specific coolant type used, as long as the cooling system is maintained properly, there shouldn't be any issues, at least with the older engines. They run cooler than the newer designs and have a proven track record."
 
"While we're on the topic

"While we're on the topic of cooling, has anyone changed the h/e cap to a higher pressure rating?

I ordered new caps and they were rated at 14lbs vs. the stock 7lbs. I talked to a guy who worked at Crusader for many years and he said that you'll be better cooling performance with a 14lb cap and will not pose any issues.

Do you guys agree?


Bob"
 
I remember reading a discussio

I remember reading a discussion several months ( maybe 14-16) ago and Rick had a OEM statement why they should be the 7psi originals.

I can't remember more about it but a search may bring it up...That is when I had ordered 2 new Crusader recommended caps...That part I do remember
 
Al:

I think the reason for

Al:

I think the reason for the factory cap recommendation from Rick was not due to the operating pressure rating of the cap but the spring on the vacuum relief side.

There isn't any need for the 14 psi cap Bob. An elevated system operating pressure raises the boiling point of the coolant. You do NOT want the coolant to get that hot for several reason.
 
Gel-like problem is an issue w

Gel-like problem is an issue with Dex cool. When it happens looks like you have some oil in the coolant. A greasy milky film at the fill point and on inside of cap.
 
"I ask because when I did have

"I ask because when I did have a coolant in the oil problem, it was clogging the oil filters but I was not using Dex-cool. Oil analysis confirmed this and subsequent re-builds fixed this issue. I like to confirm the cause and effect of these events as it lends to my knowledge base for the future.

You won't believe what I could tell you about the 1943 Harley Davidson WLA...but then you'd be asleep in 3 minutes
yawn.gif
"
 
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