Radiator!?!?
#1
Radiator!?!?
Hey all. I just removed a wvo system from my truck. Don't run it long enough to use it. Well now I have a open port off my radiator. It's on passenger bottom left of radiator. About an inch or less in diameter. There 2 ports there 1 smaller and 1 bigger. Where's she go? Thanks.
#3
Join Date: Apr 2015
Location: W. of Seattle, Kitsap P.
Posts: 625
Likes: 0
Received 10 Likes
on
9 Posts
Hey all. I just removed a wvo system from my truck. Don't run it long enough to use it. Well now I have a open port off my radiator. It's on passenger bottom left of radiator. About an inch or less in diameter. There 2 ports there 1 smaller and 1 bigger. Where's she go? Thanks.
I had to use ESP to figure out that it's a 1993 F350.
What transmission does it have? E4OD?
Does that port look like this one?
https://www.ford-trucks.com/forums/1...y-plan-is.html
Is it plugged like the one in the photo?
The only relevant text in that post is this:
... I've also read that it is used to divert hot coolant from the engine head to the transmission fluid heat exchanger (in the bottom radiator tank) to bring the transmission up to operating temperature more quickly. Someone else commented that this was not necessary and that is not it's function so I don't really know which function it serves (?)
Exactly how to do that I don't know, I've never looked at one but I would think there is a bypass valve from the hose going into the heater core from the head which diverts hot coolant from the engine to the lower tank on the radiator until the engine coolant reaches a certain temperature and the bypass valve closes- (I am only presuming this is how it works).
Inside the bottom tank on the radiator there is a heat exchanger where transmission fluid is flowing back to the transmission out the small port next to the one in that photo- That heat exchanger is mainly to keep the transmission fluid from getting too hot but in this case the transmission fluid needs to pick up more heat to come up to it's operating temperature more quickly. That is my understanding of this extra port which is just based on a few discussions in forums.
Radiators for 6.9L engines with C6 transmissions up through 1987 don't ' use such a port and a C-6 in a later model year probably has a plug in that port like the one in the photo
#4
#5
Join Date: Apr 2015
Location: W. of Seattle, Kitsap P.
Posts: 625
Likes: 0
Received 10 Likes
on
9 Posts
So, it's only a 'T' fitting with no bypass valve and the hot engine coolant runs down from the 'T' to that fitting on the radiator at all times then??
When you wrote:"restricted fitting so the flow was minimal into the rad." How is it restricted? Did you mean that it is somehow restricted at the radiator fitting? The fitting is 5/8 inch dia on the radiator I have BUT this is a plug, not intended to have fluid run through it. Maybe the fitting that is supposed to be screwed into the radiator for the E4OD is smaller for a smaller hose. If so, the 'T' would have the outlet to the radiator smaller than in line through the heater core hose (which is 5/8 inch I.D.)
Or, by 'restricted' did you mean it just has a low flow rate from the 'T'?
which would be 5/8 inch at all three ends. Even then the flow to the radiator fitting would be less than to the heater core which is straight line with less resistance.
I don't mean to confuse anyone, I am just thinking out loud about a project I've had in mind which, to do it all right, is quite technical and how this E4OD setup was originally (technically) designed to work is important. If that flow is actually restricted by design that is important for me to know.
It could be that there is really nothing much 'technical' about it. They just realized that the E4OD needed some help to get up to temperature. It's a good idea really because the much warmer engine coolant going into that radiator fitting will pass directly along the transmission fluid heat exchanger before ever being cooled by the radiator and go right back to the lower radiator hose on the driver's side and back into the water pump, etc.
I would expect at higher RPM here would be much more of that warmer coolant going into that radiator fitting - unless it does in fact have a restriction of some sort.
I am not asking you for a technical analysis, I found what you wrote very interesting, just wondering if I understand it correctly and now that the project is on my mind again I'll be out searching the web tonight for more information and try to at least find a picture of this E4OD hose set-up.
Thank you!
Thread
Thread Starter
Forum
Replies
Last Post
3KP
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
13
10-17-2016 07:17 PM
LARIAT 85
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
03-31-2011 10:51 AM