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| Overheating issue https://auszookers.com/forum/viewtopic.php?f=5&t=39627 |
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| Author: | kemp02 [ Sat Mar 16, 2013 7:48 pm ] |
| Post subject: | Overheating issue |
I have myself a 84 sierra that keeps over heating, ive replaced the thermostate flushed out the radiator and the engine, but continues to overheat, so im at wites end and know idea what ro do next, any suggestions? |
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| Author: | royce [ Sat Mar 16, 2013 7:49 pm ] |
| Post subject: | Re: Overheating issue |
when does it overheat? do you lose any coolant? did you have the rad cleaned by a shop or just hosed it out yourself? |
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| Author: | kemp02 [ Sat Mar 16, 2013 8:31 pm ] |
| Post subject: | Re: Overheating issue |
It can over heat after driving if for 2 hours hours on the highway on 5 min down the road, its so eradic but once its starts overheating it constintly will after that, i hosed it out myself and i just boils over and i gotta put like 2 litres back in it, and im currently stuxk in it 2 hours from home as we speak haha |
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| Author: | PORL [ Sat Mar 16, 2013 8:39 pm ] |
| Post subject: | Re: Overheating issue |
Possibly blown/ cracked head. Just keep water handy and half remove to radiator cap, keep an eye on the temp gauge and nurse her home Investigation / tests are required |
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| Author: | steve [ Sat Mar 16, 2013 9:08 pm ] |
| Post subject: | Re: Overheating issue |
I had a sierra that over heated all the time... I got a new radiator cap and it fixed it. |
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| Author: | kemp02 [ Sat Mar 16, 2013 9:19 pm ] |
| Post subject: | Re: Overheating issue |
If i have a wrong radiator cap for my model will that effect it? |
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| Author: | upgarage [ Sat Mar 16, 2013 9:31 pm ] |
| Post subject: | Re: Overheating issue |
yes it will affect it check the radiator for cold spots. this will indicate a blockage I just refurbed my cooling system with: tridon high flow thermostat new temp sender reconditioned radiator AU/BA falcon single thermo fan in stock shroud. removed standard fixed fan toyota red coolant thermo fan is brilliant for cooling. draw a bit of current but cools very fast currently wired to a switch until i get my jaycar universal voltage switch in there |
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| Author: | kemp02 [ Sun Mar 17, 2013 8:49 am ] |
| Post subject: | Re: Overheating issue |
okay, ill try having it tested and pressure tested, maniged to get home after a while, it seemed to sit 3 quaters of the way up cruising at 100, but didnt get any hotter for some reason.... |
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| Author: | royce [ Sun Mar 17, 2013 9:17 am ] |
| Post subject: | Re: Overheating issue |
have a squiz at your fanbelt, make sure its correct tension and not worn, might be randomly slipping Also something that happens on 1 litres that dont have an earth between body and negative battery terminal, when your lights are on or you have something high current operating, it upsets the voltage regulator for the gauges so the temp reads higher even though its not running hotter, a fat earth to the body sorts it out |
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| Author: | kemp02 [ Mon Mar 18, 2013 8:37 pm ] |
| Post subject: | Re: Overheating issue |
It definatlybreading right cos when it says its like halfway/three quarters its bubbling away, and i replaced the fan belt a week ago, and have checked tention twice since, when its ran from idle and left to sit, only the top of the radiator fets got and the bottem hose and the radiator stays cold, so im thinking possibly clogged radiator or new water pump needed? |
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| Author: | alexxx [ Mon Mar 18, 2013 11:11 pm ] |
| Post subject: | Re: Overheating issue |
Get it properly flushed buddy. It's very hard to tell. |
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| Author: | shandy92 [ Tue Mar 19, 2013 12:04 am ] |
| Post subject: | Re: Overheating issue |
alexxx wrote: Get it properly flushed buddy. It's very hard to tell. not really, get a temp gun. anything more than 15 or so deg difference in temperature (between top and bottom hose) will indicate a blocked radiator.....easy! with a blocked rad, its actually cooling the coolant heaps because the coolant is staying in the rad for a long time. but its also staying in the block for to long which is what causes it to get hot. without thermal differential there is no cooling! |
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| Author: | sideways [ Tue Mar 19, 2013 12:32 am ] |
| Post subject: | Re: Overheating issue |
steve wrote: I had a sierra that over heated all the time... I got a new radiator cap and it fixed it. x2 when I bought the LJ it had a dead radiator cap. The spare I brought was a dud too. It'd spew all the water out into the overflow bottle and overheat every 15kms. That was a long 300km drive home.  Have you got a fan shroud? Is it a 1l or 1.3l? |
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