[TR] Re torque TR4A head, hot or cold ?

[Tony Drews]

The question was RE-torque.  Obviously you put the engine together 
including properly torquing the head while it's cold. With an iron head 
and composite gasket you run the engine for a bit (I use the cam 
break-in 20 minutes for that), and when it's good and warm you torque 
the head a 2nd time.  With an aluminum head you're supposed to let it 
cool before torquing a 2nd time.

Tony


On 7/31/2018 7:53 PM, David P wrote:
>
> this makes no sense. To get it hot it has to run, but one wouldn't run 
> it without it being torqued down especially with wet liners. So cold 
> torque the head and use new studs and nuts too. daveP
>
>
> On 7/31/2018 12:26 PM, Tony Drews wrote:
>>
>> Retorque hot.
>>
>> A rule I thumb I was recently told: Iron head = retorque hot, 
>> Aluminum head = retorque cold.
>>
>> Cheers, Tony Drews
>>
>>
>> On 7/31/2018 10:51 AM, asg123 at centurylink.net wrote:
>>> Recently replace the exhaust valves on my car.  New German made head 
>>> gasket. Running well, very pleased. Wonder what the consensus is it 
>>> better
>>> to re torque when engine is cool or hot?  As always thanks to all 
>>> for the help I have received keeping this car going over the years.  
>>> Arnold S Gilmour
>>>
>>>
>>>
>>>
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>>
>>
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