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-   -   More Cooling system questions (http://www.ptcruiserlinks.com/forum/tech-performance-forum/52739-more-cooling-system-questions.html)

euphonium_john 22 Apr 2014 09:59 am

More Cooling system questions
 
Hi Folks.

I'm still confused with our PTs cooling system.

We bought our secondhand 2.0l auto second hand a couple of weeks ago.
The first weekend we had it - it got quite hot - but I shut it off before it got anywhere near the red.

After that - I found the coolant in the system to be a bit low - although the expansion tank was full.
We gave it back to the dealer - who ran it for a couple of days - it never got hot again - and they had a garage check it - and it didn't get hot either.

I put a new radiator cap on.

This weekend I checked that the fan was coming on after testing the relays. It does - just about when the temp needle nudges over half way.

When left idling the temp rises to half - then at just over half the fan kick in.

If I rev the engine though the temp drops to where it seems to normally sit which is at roughly 4 o'clock.

When driving temp varies between 4 o'clock and half - half in slow traffic.

Am I right in thinking half way is the normal position?

taking this into account - the thermostat was changed last October - could it have been a faulty one - as my diagnosis would seem to suggest it's running a bit cold??


Thanks..

thecabinguy 22 Apr 2014 10:31 am

Re: More Cooling system questions
 
Quote:

Originally Posted by euphonium_john (Post 521445)
Hi Folks.

I'm still confused with our PTs cooling system.

We bought our secondhand 2.0l auto second hand a couple of weeks ago.
The first weekend we had it - it got quite hot - but I shut it off before it got anywhere near the red.

After that - I found the coolant in the system to be a bit low - although the expansion tank was full.
We gave it back to the dealer - who ran it for a couple of days - it never got hot again - and they had a garage check it - and it didn't get hot either.

I put a new radiator cap on.

This weekend I checked that the fan was coming on after testing the relays. It does - just about when the temp needle nudges over half way.

When left idling the temp rises to half - then at just over half the fan kick in.

If I rev the engine though the temp drops to where it seems to normally sit which is at roughly 4 o'clock.

When driving temp varies between 4 o'clock and half - half in slow traffic.

Am I right in thinking half way is the normal position?

taking this into account - the thermostat was changed last October - could it have been a faulty one - as my diagnosis would seem to suggest it's running a bit cold??


Thanks..

Have two PT Cruisers and they both run exactly at the halfway temp mark when fully warmed up, rarely seems to vary.

quicksilverdon 22 Apr 2014 11:10 am

Re: More Cooling system questions
 
Quote:

Originally Posted by thecabinguy (Post 521450)
Have two PT Cruisers and they both run exactly at the halfway temp mark when fully warmed up, rarely seems to vary.

Same here with both my PTs. 1/2 mark on gauge and stays there.
You may have gotten a slightly cooler thermostat.


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