K Series Temperature Query

[Scared Was The Sheep]

Last year I had a QED(something like that) thermostat setup put into my 1400K SS, essentially the thermostat is being controlled by the water coming out of the engine.

 

Hopefully the above makes some sense as you may have gathered I'm wonderfully technical with engines, etc.

 

On initial running from cold the temperature quite rapidly gets up to 80ish and then drops back to cold, this cycle happens about 3 or 4 times. After this all settles down and the temperature seems to permanently run at just above the blue.

 

My question is simply whether this is normal and whether this will be causing problems?

 

Thanks

[Stationary M25 Traveller]

Does this sound like the infamous sender or gauge problems ??

 

If it is an electric gauge, pull the wire off it and touch the connector onto something metal on the engine - the gauge should read full scale while you do this.

 

******************

And you run and you run to catch up with the sun, but it's sinking...

 

And racing around to come up behind you again. photos

[Scared Was The Sheep]

I'll ask for some assistance from a mate who'll hopefully be able to help me as to whether it's electric or not.

 

Thanks for the advice, I take it that the temperature should be at a higher level then.

[martinwhitcher]

This does sound normal for that set-up i imagine? why do you say the sender?? very rarely does the water sender or guage go wrong, oil yes!

 

Martin

 

MW 51 CAT

Superlight No.171

now known as:Superlight DVA 250

[Myles]

I went through a water-temp sensor every couple of months or so. Got fed-up after number six or so and went to SPA gauges.

 

The fact that the cycling appears to be repeatable suggests to me that there is a fundemental issue with the cooling system itself. I'm not sure where this obsession with the remote stat comes from - my k works - cooling-wise - with the standard setup...

 

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Alcester Racing

7s Equipe™

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Alcester-Racing-Sevens.com

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[Scared Was The Sheep]

I'm not convinced that there is a fundamental problem with the cooling system, although am prepared to be proved wrong.

 

The cycling to begin with when running, appears to be heating up, the stat opening and realising it's cool and closing again, repeating this cycle until the entire system is warm. At this point it appears to stay open permanently.

[Simon.Rogers1]

Myles

 

It is not a problem per say with the cooling system just that whena stat does need changing the position/location in the 7 particularly for those with the dry sum means it is a pain in the 🙆🏻 to change.

 

Whereas with the QED set up you don't even lose much water and it takes 2 minutes.

 

Nick

 

By the way my set up does not warm up so quickly or cool and warm again etc. My guess is that your stat does not have any holes drilled in it allowing water to by pass the stat until it warms up sufficiently.

 

Simple job. Take the stat out and drill one or two 3mm holes. Replace. This will probably solve your symptoms.

 

 

 

Giving it some Welly. As Always!

[Colin Mill]

If the stat is in the top hose and almost seals completely it is not getting a chance to 'sample' the output water temperature so there is a great chance of getting a major temperature overshoot. I'm sure the drillings are the way to go to ensure the stat sees the true output water temperature as soon as possible. As a general rule delays in feedback loops like this are a recipe for oscillation