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I did a compression test the low was 148 the high was 178 .I changed the thermostat but its still getting hot .there seem to be no cerculation of water to the top radaitor hose

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Possibly needs a new water pump, either that or you have a blockage in the radiator,. Make certain you didn't put the thermostat in back to front. Take the thermostat out altogether and try it.

Posted on May 02, 2015

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I answered the other question you placed but you have airlock problems or the rad is blocked. Again, you don't say make model year mileage etc. If its been run for any significant period without antifreeze / summer coolant then the rad is blocked with dissimilar metal debris / crud.

Posted on May 02, 2015


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Posted on Jan 02, 2017

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SOURCE: coolant problems 2000 vw jetta

plastic impeller on water pump has come adrift

Posted on Dec 22, 2008

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SOURCE: Running hot, changed thermostat and flushed

1. blocked radiator core
2. blown head gasket
3. cracked head
4. water pump
These would be the major problems causing the overheating.
Timing could be another but unless the timing has been changed recently it is most probably one of the causes

Posted on Jun 16, 2009

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SOURCE: Toyota 2ct diesel turbo in 4x4 Townace van 1991

it is the head gasket blown from the cyl to the water jacket ,a radiator specialist can test for combustion gases in the water to confirm this ,but that is what it is . "youdoit"

Posted on Oct 25, 2009

Testimonial: "compression test ok still looking"

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SOURCE: Radiator problems

it may be a little off, but the lower water hose seldom gets very hot,, as its this hose that suplyes the engine with ""cold water"" the hot water comes out the top hose,, drains down the rad and cools on the way down then enters the engine through the bottom hose """if your engine stayes running in the normal place on the gage,,,and not over heating""" why are you spending money for nothing???""
you wont get the bottom hose to run hot unless the engine is cooking

Posted on Oct 30, 2009

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SOURCE: 2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat

Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Posted on Nov 19, 2009

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Replaced thermostat took a compression test the low was148 the high was 178 there seems to not having waterflow back to the top radiator hose

You won't until the thermostat opens. The open temp is on the unit or box. Check your particular model online at owners forums etc to see if airlocks are a problem. If all else fails remove the thermostat temporarily and see if there is a return flow then. You don't say what the original problem was / is?

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over heating after driving for a period of time indicates that the cooling of the system is not at capacity and the heat generated by the engine is slowly building up
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Have a 2002 Honda Civic. Driving around midafternoon when the needle started to rise to hot, I quickly turned off ac and the when back down. The next driving around with no ac and the needle was moving...

Sounds like the thermostat is not working properly on your car. I would suggest changing it out, and

getting a radiator flush. if that thermostat freezes shut and does not open when the engine gets hot.

you could have bigger problems, like a blown headgasket, ruin your water pump or rupture radiator

hoses. good luck!

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This is indicative of a clogged or sticking themostatic control valve. Just for information purposes, the frozen side should be the low side. The high side should be hot due to compressing of the gas. Let me now if you need instructions on the R&R or if you wish to just take it to a shop.

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