Overheating trouble- Ka24E in an Axxess

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speedy - 21 May 2008 00:56 GMT

Started with a higher than normal temp. I blew the head gasket getting
it home. Fixed the gasket, engine runs very well, BUT it still overheats.

-Installed a new thermostat even though the old one was still good.
(rare for a thermostat thats been "cooked!)

-R&R water pump in case that was a problem , but it looks mint.

-Radiator is only not quite 2 years old and looks great and the radiator
place says there is nothing wrong with it.

I've never had ANY trouble with temperature in this vehicle, until now.

ANy silly Nissan quirks that might guide me to the real problem??

TIA,

-Speedy

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AS - 21 May 2008 04:15 GMT

When does the engine overheat? At idle, coasting, ...?

Overheating could be the result of:

-Lack of lubrication.
-Lean air/fuel mixture.
-Defective radiator cap.
-Restricted exhaust pipe.
-Trapped air in cooling system.
-Colapsed, blocked hoses.
-defective fan (is it electric? mechanical?) IF electric, relays,
fuses, etc.
-Restricted air flow for the radiator.
-Blocked passages in cooling system, radiator.

Good luck!

> Started with a higher than normal temp. I blew the head gasket getting
> it home. Fixed the gasket, engine runs very well, BUT it still overheats.
[quoted text clipped - 14 lines]
>
> -Speedy

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speedy - 22 May 2008 03:00 GMT

> When does the engine overheat? At idle, coasting, ...?

anytime, it only gets warmer as it runs

> Overheating could be the result of:

nope -Lack of lubrication.
nope -Lean air/fuel mixture.
nope -Defective radiator cap.
nope -Restricted exhaust pipe.
maybe -Trapped air in cooling system.
nope -Colapsed, blocked hoses.
nope -defective fan (is it electric? mechanical?) IF electric, relays,
fuses, etc.
nope -Restricted air flow for the radiator.
dont think so -Blocked passages in cooling system, radiator.

> Good luck!

I did take out the NEW thermostat and run it. Confirmed that the water
pump is doing its job. Next is putting it back and I think I will fill
the cooling system through the top hose.

-SP

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AS - 22 May 2008 04:06 GMT

forgot... late ignition timing?

>> When does the engine overheat? At idle, coasting, ...?
>
[quoted text clipped - 20 lines]
>
> -SP

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Chuck Tribolet - 24 May 2008 03:10 GMT

Retarded spark is one most folks don't know about -- I learned when
I dropped the rebuilt original engine into a '68 Firebird 400 ragtop. The spark was
retarded, and not much, and on first fire-up it overheated in about five minutes at idle while
I was checking other stuff.

Folks, file this one away.

> forgot... late ignition timing?
>
[quoted text clipped - 21 lines]
>>
>> -SP

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speedy - 25 May 2008 03:36 GMT

When this thing started to cook, I bought a NEW thermostat from
Autozone. (Well they were nearby and open, but I should know better) I
have had problems previously with their thermostats only lasting a few
years.

Ran the Axxess with NO thermostat and it didnt get warm. At least that
was expected. Put the thermostat back in and it promptly went into the
hot zone! Put my old one back in AFTER testing them in a pot of water,
and the temp held at where I expected it to be.

The boil test showed me the NEW t-stat opened very slowly and not all
the way. It was barely open when the original one was fully open.

I guess you cant trust new out of the box parts anymore.

I'll add thermostats to the DO NOT BUY AT AUTOZONE along with master
cylinders.

Now to fix another $&%)_@#_$ leak!

-SP

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Jim Yanik - 25 May 2008 15:44 GMT

> When this thing started to cook, I bought a NEW thermostat from
> Autozone. (Well they were nearby and open, but I should know better) I
[quoted text clipped - 10 lines]
>
> I guess you cant trust new out of the box parts anymore.

No,you just can't trust aftermarket parts. Use OEM.

I've had the "cross-reference" recommend a TS with the WRONG temp for the
car I had. So I bought one from the dealer,it was worth it.

Signature

Jim Yanik
jyanik
at
kua.net

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