LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently December 13, 2018, 7:28 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 40 posts ]  Go to page Previous  1, 2, 3
Author Message
PostPosted: October 12, 2017, 3:33 pm 
Offline

Joined: July 18, 2009, 9:40 pm
Posts: 131
Location: Frankfort, KY
I've done a leakdown test, but not yet a co2 test. I'll pick up one of those kits. I like to think I shouldn't need another radiator as well, but so far nothing else seems to be working. Maybe the co2 test will reveal an issue that the leakdown test couldn't detect.


Top
 Profile  
Reply with quote  
PostPosted: October 12, 2017, 5:12 pm 
Offline
User avatar

Joined: July 17, 2008, 9:11 am
Posts: 4801
Location: West Chicago,IL
A second radiator will not be required unless you see temps rising noticeably higher then your thermostat or > 240 deg.

50/50 ethylene glycol mix and 15 psi cap will not boil until 265 deg F.

Simply said, your problem is elsewhere.

_________________
Chuck.

“Any suspension will work if you don’t let it.” - Colin Chapman

Visit my active Cushman Truckster resurrection log: over HERE
or my archival Locost build log: over HERE


Top
 Profile  
Reply with quote  
PostPosted: October 12, 2017, 5:37 pm 
Offline

Joined: July 18, 2009, 9:40 pm
Posts: 131
Location: Frankfort, KY
rx7locost wrote:
A second radiator will not be required unless you see temps rising noticeably higher then your thermostat or > 240 deg.

50/50 ethylene glycol mix and 15 psi cap will not boil until 265 deg F.

Simply said, your problem is elsewhere.


Going much over 240 with Aluminum heads sounds like a recipe for disaster, and I'd rather not test that. Regarding the mix, I've gone with a lower percentage of antifreeze, a bit of waterwetter, and the rest distilled water. I'd think that once the engine is turned off, the coolant is very likely to reach very high temps while it sits in areas of high temps and is no longer flowing with the waterpump.


Top
 Profile  
Reply with quote  
PostPosted: October 12, 2017, 6:56 pm 
Offline
User avatar

Joined: July 17, 2008, 9:11 am
Posts: 4801
Location: West Chicago,IL
I'm not recommending that running at 240F is OK mind you. Only that the 50/50 antifreeze coolant should not bubble over like you are seeing until over 240F.

Altitude and pressure affect the boiling point of water. At an altitude of ~6,000 ft, water boils at ~200 deg F, not 212F. Just suppose you are a) using 100% water, b) your thermostat is rated to open at 190 degrees and c) your are running no pressure radiator cap as in trying to remove air pockets, then turn off the engine, then I can easily see boil over happening inside the engine and pushing out cooler colant. A 2nd radiator won't fix that.

From my limited experience, I've never had issues like what you are seeing. There is some other problem that a 2nd radiator will not fix.

_________________
Chuck.

“Any suspension will work if you don’t let it.” - Colin Chapman

Visit my active Cushman Truckster resurrection log: over HERE
or my archival Locost build log: over HERE


Top
 Profile  
Reply with quote  
PostPosted: October 13, 2017, 8:43 am 
Offline
User avatar

Joined: September 22, 2005, 8:12 am
Posts: 1523
Location: 4AGE in S.E. Michigan
Could you possibly have the wrong water pump [blades in the wrong direction]. dave w


Top
 Profile  
Reply with quote  
PostPosted: October 13, 2017, 10:25 am 
Offline

Joined: July 18, 2009, 9:40 pm
Posts: 131
Location: Frankfort, KY
Water pump is in the right direction. Removed that a long time ago to check, and went ahead and replaced it while it was removed.


Top
 Profile  
Reply with quote  
PostPosted: October 13, 2017, 11:00 am 
Offline
Always Moore!
User avatar

Joined: November 9, 2007, 3:40 pm
Posts: 3944
Location: Pittsburgh, PA
Don't recall you mentioning it - what is your timing at idle?

_________________
-Andrew
Build Log
Youtube


Top
 Profile  
Reply with quote  
PostPosted: October 13, 2017, 11:04 am 
Offline
User avatar

Joined: March 19, 2011, 10:22 am
Posts: 1272
Location: Holden, Alberta, Canada
What is your timing at idle vs 2000-2500 rpm?
LOL a.moore beat me to the question

_________________
Perry

'If man built it, man can fix it'
"No one ever told me I couldn't do it."
"If you can't build it safe, don't build it."

Perry's Locost Super Che7enette Build
Perry's TBird Based 5.0L Super 7 L.S.O.
Perry's S10 Super 7 The 3rd
Perry's 4th Build, The Topolino 500 (Little Mouse) Altered


Top
 Profile  
Reply with quote  
PostPosted: June 3, 2018, 10:43 am 
Offline

Joined: July 18, 2009, 9:40 pm
Posts: 131
Location: Frankfort, KY
Just a heads up, the cooling problem is fixed. Previous radiator just wasnt sufficient. It cools in 90 degree days on hot new pavement now. The new radiator was custom built and required moving the nose forward 5 inches.


Top
 Profile  
Reply with quote  
PostPosted: June 3, 2018, 11:45 am 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 5820
FWIW, I've had a 5.0L ranger since highschool.

Not to beat a dead horse, but it didn't look unusual to me in the video since the system was not under any pressure from a cap.

I have not seen any pics but you should have an over flow even if you have an expansion tank, unless you keep the expansion tank half full or less. Hot coolant expands and has to go somewhere, particularly after shut off.

I have an expansion tank on the trike but only because I needed a high fill point since the raditor was so low.

An overflow is any vented container that will catch the fluid and the hose from the cap is always below the coolant level in the overflow so it will return to the radiator when the system cools, so no loss of coolant with each thermal cycle.

Just fyi.

_________________
MV8

https://www.youtube.com/watch?v=Om3C1Ep ... D3E18BB447


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 40 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY