3 replies to this topic

[Miki Leyland]

Hello all,

 

1973 AUTHI Mini 850 L currently with a 998 A+ +0.20 flat pistons, stage 2, rebuilt 2 years ago with an alloy rad and EVO type water pump without bypass. 50% Bluecol coolant. Thermostat is the 82º type.

 

Normally temp needle is just before the middle when it is running hot, as is was today under 17º C outside. I've checked the cylinder head temp with the infrared gun, reading 84º around the temp sensor (under the thermostat), BUT 102ºC at the second bolt from left to right (between the first two sparkplugs). This is the point from which I get the hottest reading.

 

My question is: Is it normal to get such a different temp reading along the cylinder head? And is 102º too hot?  I don't know exactly from which points to measure temp readings.

 

Thanks in advance

 

 

[nicklouse]

Yes it is normal. Which is why on performance engines you make sure the heater take off is always open or you dry deck the head so as to get a proper water flow.

[croc7]

Yes it is normal. Which is why on performance engines you make sure the heater take off is always open or you dry deck the head so as to get a proper water flow.

I've never heard the term 'dry deck' applied to an engine.  What is that?

[sonikk4]

 

Yes it is normal. Which is why on performance engines you make sure the heater take off is always open or you dry deck the head so as to get a proper water flow.

I've never heard the term 'dry deck' applied to an engine.  What is that?