You are here

202 overheating

I have a Hj Holden 202 trimatic that is overheating. It has a cracked core plug could this be the cause could it be sucking air I've replaced everything else. With no thermostat in place takes 4 mins to reach 90 degrees any help would be appreciated
Thanks

Model: 
Topic: 
Engine: 
Section: 

Comments

90 degrees is not even close to overheating but there are some thing to consider.
Is it loosing coolant from the core plug?
Is the removal of the thermostat and sucking air from the plug causing cavitation?
There are also many other things which could be causing overheating which are not associated with the core plug. My first though is that if it is sucking air from the core plug the cooling system will no longer be pressurized and the coolant can boil. Either way the plug needs to be fixed and the thermostat needs to be replaced. If it still continues then it will be easier to diagnose.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

If the cracked core plug is allowing coolant pressure loss, the fluid level will drop and overheating will result.

Otherwise, ensure the engine really is overheating, and it's not the Temp Gauge overreading. The radiator core could be restricted, fan belt slipping etc.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

T

My Shed

Holdenpaedia, they're the brakes Mate.

BTW it can't really suck air into the system unless there is some type of vacuum being created.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

As above, replace the thermostat. People wrongly believe by removing the thermostat, the engine will run cooler. The thermostat allows not only quicker warming of the water at start up so to reach optimal operating temperature sooner, but slows the water flow through the radiator to allow the air flow through the core to do it's thing by removing some heat from the water. With no thermostat, the water will flow fast, as engine speed dictates, through the radiator not allowing for heat to be removed. Replace the thermostat.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

Cheers
Keith

It's not clear what you have replaced? You have a cracked welch plug and no thermostat fitted...has the radiator, hoses, radiator cap and water pump been replaced and the block thoroughly flushed? If you are running a viscous coupling (Fan Clutch) these can appear to be working but only free wheeling and not drawing air through the radiator...had this problem on a HZ and it took me a long time to figure it out...Agree with other poster - the welch plug should be replaced irrespective...have you had the radiator professionally cleaned with rods? Rectify leaks , assess coolant flow will usually address the problem - if not then move onto air flow, timing, cylinder head etc..

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

Andrew

Never do that but instead, remove the centre bit so your left with the outer, it restricts the flow a bit .. but i agree with others .. run one.
Also pays to park with front uphill as much as ya can then fill with coolant and idle 10 15 minutes (chuck in a few revs here an there for the lifters sake)to bleed any air pockets out .. remember heater on for this.
Timing out can cause temp rise too.
If you have the little 4 blade fan, i'd lose it for a bigger one or better again, clutch fan from a blue motor.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

Want a headache ?
Nurse explains.. https://hooktube.com...
Jet fuel hoax https://www.facebook...

Add new comment

Filtered HTML

  • Allowed HTML tags: <a> <strike> <blink> <i> <u> <br> <b>
  • Filtered words will be replaced with the filtered version of the word.
  • Lines and paragraphs break automatically.
  • Web page addresses and e-mail addresses turn into links automatically.

Plain text

  • Allowed HTML tags: <a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • No HTML tags allowed.
  • Filtered words will be replaced with the filtered version of the word.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
Comment attachments
Files must be less than 100 MB.
Allowed file types: jpg jpeg gif png txt pdf bmp mov mp4 mp3 avi.
CAPTCHA
This question is used to make sure you are a human visitor and to prevent spam submissions. Email rusty@oldholden.com if you have a problem.
  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.