300tdi coolant problem - Defender Source
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  #1  
Old April 17th, 2012, 11:05 PM
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83 D110 RHD 300tdi Disco conversion
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300tdi coolant problem

New:
radiator
check valve
thermostat
p gasket
thermostat housing gasket to head
gasket on thermostat u
water pump

pushes all coolant into resovoir hits 220 I shut it off before I use an electric cooling fan and clutch fan all are in good condition the electric fan is on a swithc not a sensor.

any ideas????????

No moisture in exhast pipes
No mix of oil and coolant on radiator side or oil side.
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  #2  
Old April 18th, 2012, 07:03 AM
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Mike
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Is the system over pressurizing? What is the mileage on the engine, head etc. Are you loosing coolant? I would replace the Thermostat. Some new less expensive brands have been bad. Easy to check what you have off the truck however. Are you certain that the gauge is not at fault?
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  #3  
Old April 18th, 2012, 08:16 AM
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mark kellgren
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yes. need more information. I have finally cracked my cooling problems with my 2.8. could easily just be gauge. what are the driving conditions that you overtemp?
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  #4  
Old April 18th, 2012, 12:32 PM
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The system is overpressurized I removed the thermostat to see if it was that. It still overpressurized. I disconnected the heater core and bypassed it and it continued. I added a gage to in the thermostat housing and when it reached 210 it would spew through the cap. I was suggested a carbon test to see if its a blown gasket.
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  #5  
Old April 18th, 2012, 12:39 PM
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mark kellgren
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that's my guess. escaping exhaust gases leaking into coolant is the most likely culprit for a pressurized blowout.
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  #6  
Old April 18th, 2012, 01:31 PM
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hmmm does anyone know of an exhaust test?
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  #7  
Old April 18th, 2012, 01:43 PM
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mark kellgren
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go to napa and you can get a sniffer kit for about $30-$40. there's a good youtube on using it as well by trailfitter.

it's not a absolute test. there's a risk of false negative. it uses a fluid that changes color when it detects exhaust in the coolant gases. if you are being pressurized though, it should give you a good reading. there are some gasket leaks that do not lead to exhaust gases in the coolant, which yields the false positives.
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  #8  
Old April 18th, 2012, 01:57 PM
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i will check that out
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  #9  
Old April 18th, 2012, 04:24 PM
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Quote:
Originally Posted by Overlander View Post
that's my guess. escaping exhaust gases leaking into coolant is the most likely culprit for a pressurized blowout.
That. Been there, done that.
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  #10  
Old April 18th, 2012, 09:02 PM
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Quote:
Originally Posted by Overlander View Post
that's my guess. escaping exhaust gases leaking into coolant is the most likely culprit for a pressurized blowout.
That was my first thought too but I didn't want to be too negative. I have seen that on several trucks.
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  #11  
Old April 19th, 2012, 12:25 AM
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I am trying to discover what type of gaske I have and supplies needed. bolts gaskets
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  #12  
Old April 19th, 2012, 01:19 AM
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While on the subject...

Since this thread is going, wondering if anyone has a suggestion for me.

I have a 200tdi that only recently started having problems with increased temps. In the past it ran at about 190. I have a new vdo guage. New thermostats x 3 temporarily fix the problem then it starts again. When this happens, temps seem to go down temporarily when rpms are up then increase while coasting/neutral. Take the thermostat out, it runs at about 110F and temp never goes up no matter the load. Could the thermostats be that bad/ unreliable? Or am I missing something? Radiator is new.

Thanks

Tom
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  #13  
Old April 19th, 2012, 07:36 AM
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mark kellgren
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Do not take the thermostat out ever!
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  #14  
Old April 20th, 2012, 12:00 AM
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Just for a test only.
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  #15  
Old April 20th, 2012, 09:35 AM
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I had similar problems with my 200Tdi. I tested with the NAPA sniffer and got negative results, but I could see bubbles coming up through the coolant in the reservoir. New head gasket cured the problem.
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  #16  
Old April 22nd, 2012, 08:43 PM
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Quote:
Originally Posted by 323jamie View Post
I am trying to discover what type of gaske I have and supplies needed. bolts gaskets
If you look on the right side of the motor you can see what type of head gasket you have. The gaskets are marked with holes, or no holes to designate the thickness of the gasket. Look right below the head and you will see a portion of the gasket protruding beyond the block. This will be the section to look for the holes. The gasket thickness is determined by the piston protrusion. You will also need a set of head bolts. While you are at it I would also get a bolt set for the intake and exhaust. I would also highly recommend to have the head checked before you put it back on to make sure it isn't warped or cracked.
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  #17  
Old April 23rd, 2012, 01:39 PM
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its a 3 hole.
head bolts paticular brand? or place to order

British Pacific for parts are they reputable?
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  #18  
Old April 24th, 2012, 08:24 PM
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British Pacific for parts are they reputable?
Check Turner Engineering. They ship to US quickly.
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  #19  
Old April 24th, 2012, 08:46 PM
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+1 on Turner. Head bolts are reasonable too.
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  #20  
Old April 25th, 2012, 12:21 AM
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Thanks a bunch on this.
I just conducted the exhuast gas temp check and the fluid stayed the purple.

After reconsidering my trouble shooting I think its a clogged or blocked injector which if you read the service manual its states overheating can be caused by a block injector. This is simple way to check the injectors.
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