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  #1  
Old March 6th, 2016, 01:22 PM
jason1st
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Jason Crandall
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New 4.6 issue

I've recently installed a new Rover 4.6 in my 110.

Now that spring weather is here it runs a lot hotter than it did. Been having green coolant spray out of the cap when I run it on the freeway. I'm using stock air intake trumpet and stock exhaust.

It hasn't overheated at all but the water temp gets above 200 nowadays.

Will a better air intake help? Seems pulling hot air through from inside the hot engine compartment can't help.
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  #2  
Old March 6th, 2016, 01:49 PM
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Andrew P
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Where I would start...

Electric fan or mechanical? And is it working?

Thermostat stuck?

What condition is the radiator in? New?

I doubt getting a better air intake will help much if at all.
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  #3  
Old March 6th, 2016, 01:52 PM
jason1st
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Quote:
Originally Posted by xplorUtah View Post
Where I would start...

Electric fan or mechanical? And is it working?

Thermostat stuck?

What condition is the radiator in? New?

I doubt getting a better air intake will help much if at all.
Radiator is new.

Electric fan and it's working.

The other stuff I'm not sure about.

Do you know where I can order a new hose that connect the intake to the MAF?
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  #4  
Old March 6th, 2016, 02:34 PM
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Something is wrong if coolant is spraying out of the cap and it isn't overheating.

What radiator are you using? Some 4.6's require a bigger radiator, and some don't. I've put in a bunch a couple (including my own) have required a 4 core radiator. I also run a Range Rover Classic 11 blade fan.
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  #5  
Old March 6th, 2016, 02:52 PM
jason1st
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Quote:
Originally Posted by Jymmiejamz View Post
Something is wrong if coolant is spraying out of the cap and it isn't overheating.

What radiator are you using? Some 4.6's require a bigger radiator, and some don't. I've put in a bunch a couple (including my own) have required a 4 core radiator. I also run a Range Rover Classic 11 blade fan.
You're over my head unfortunately.

I do know when I first crank it up in the morning it runs great. As soon as it's warmed up it doesn't seem to run as smoothly. I feel the issues are connected.

A new radiator was ordered and installed for this engine. I'll look under the hood, take some pics and provide more information.
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  #6  
Old March 6th, 2016, 02:53 PM
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What radiator did you use?
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  #7  
Old March 6th, 2016, 03:42 PM
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Kevin Keith
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How's your heat from your heater?
You may just have an air pocket. Try bleeding the system.
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  #8  
Old March 6th, 2016, 03:57 PM
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Quote:
Originally Posted by Kevin88RRC View Post
How's your heat from your heater?
You may just have an air pocket. Try bleeding the system.
I never turn the heater on as there's so much heat radiating from the engine and trans I don't need it. I don't think the vents are hooked to the heater blower motor anyways.
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  #9  
Old March 6th, 2016, 04:35 PM
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Trevor Griffiths
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The heater core utilizes coolant circulated as part of the system that cools the engine. It's like a smaller radiator. Do the coolant hoses to and from the heater core feel hot? Do you have an infrared temp gun? Was a new cap fitted to the expansion tank with the radiator and engine project? There may be a number stamped on it, such as 15 lbs or 15 psi.. How do you know it's running 200*?
A/C? Big lights on the brush bar?
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  #10  
Old April 26th, 2016, 05:36 PM
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The issue was not a hot running engine.

I definitely have and electronics issue. Talking with Cannibal V8 (where I bought the engine) the engine has too much spark knock or what they call "detonation". I need to know how to make sure the sensors system is working properly and if not how we can repair it.

Can anyone who has successfully installed a GEMS 4.6 help me out?
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  #11  
Old April 26th, 2016, 07:22 PM
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Brett Fritzler
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Cannibal V8 strikes again!
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  #12  
Old April 26th, 2016, 07:24 PM
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Quote:
Originally Posted by fishEH View Post
Cannibal V8 strikes again!
I was thinking the same thing.

------ Follow up post added April 26th, 2016 07:27 PM ------

Quote:
Originally Posted by jason1st View Post
Can anyone who has successfully installed a GEMS 4.6 help me out?
Can you go into more detail of the symptoms you are experiencing?

Also, is this in an '83 110? Who converted it to GEMS? The more information you can provide the better. Post some pics if you feel like it.
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  #13  
Old April 26th, 2016, 07:42 PM
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First, the total advance on your timing is lower on the 4.6 than the 3.9 or other. It is something like 28 degrees total advance--so you will need to reset that. I also run electric fans and a four core radiator. I have to run right now, but I'll get you some more info on what I run...
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  #14  
Old April 27th, 2016, 01:40 AM
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Initial startup the engine runs smooth supposedly because the electronics know it's cold so it runs the engine rich. Once the engine and ECT warms up the O2's take control of the air/fuel mixture and I get knocking.

It's a new Cannibal V8 with GEMS electronics. None of my engine is from the 1983 3.9 liter that was in there originally. All the old has been removed.
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  #15  
Old April 27th, 2016, 02:44 AM
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Quote:
Originally Posted by jason1st View Post
I need to know how to make sure the sensors system is working properly and if not how we can repair it.
If you mean oxygen sensors, do you know how long it has been since they were replaced? Not much harder than a spark plug to replace. And have you scanned for codes?
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  #16  
Old April 27th, 2016, 07:49 AM
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Are the oxygen sensors definitely plugged in correctly? IIRC, it is pretty easy to mix them up on a GEMS truck.
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  #17  
Old April 27th, 2016, 08:12 AM
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J. Michael McCaig
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Have a mechanic test for exhaust gasses in the coolant. You can buy the kit to do it yourself from NAPA if you want to do it yourself. If exhaust gasses are in the coolant, you have internal engine issues (head gasket or cylinder liner) which would explain the over pressurized cooling system.
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  #18  
Old April 27th, 2016, 08:46 AM
jason1st
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Quote:
Originally Posted by cowboy View Post
If you mean oxygen sensors, do you know how long it has been since they were replaced? Not much harder than a spark plug to replace. And have you scanned for codes?
My mechanic is scanning for codes but says the codes his machine spits out are unreadable. I'll ask about the O2 sensors.

------ Follow up post added April 27th, 2016 08:49 AM ------

Quote:
Originally Posted by cowboy View Post
If you mean oxygen sensors, do you know how long it has been since they were replaced? Not much harder than a spark plug to replace. And have you scanned for codes?
This is a new install.
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  #19  
Old April 27th, 2016, 08:58 AM
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It would be interesting to run the heater and see if it affects the overflow of coolant.
Was a new wTer pump used?
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  #20  
Old April 27th, 2016, 09:12 AM
jason1st
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Quote:
Originally Posted by Rocky View Post
It would be interesting to run the heater and see if it affects the overflow of coolant.
Was a new wTer pump used?
The coolant is not the issue. I've updated what the issue is.
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