HOW TO DO AN ADVANCED SEARCH.
Mon Jul 08, 2013 3:56 pm by Admin
For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.
When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).
After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …
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LT1 cooling system expansion tank
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944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: General Mechanical
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LT1 cooling system expansion tank
It would appear that I have ben running without an expansion tank for the last 7 years or so and my cooling system chucks out water from the header tank 15lb filler cap. It is the white triangular tank that the surge tank burps to.
Any comments or thoughts on why the LT1 needs this tank?
Thanks
Q
Any comments or thoughts on why the LT1 needs this tank?
Thanks
Q
Re: LT1 cooling system expansion tank
An expansion tank prevents the exact issue you are describing. It gives the liquid a place to go, when it expands, while allowing said liquid to return as it.cools. It is also the highest point in the cooling system, helping to bleed air from the system.
Not specific to the LT1
Not specific to the LT1
948- Moderator
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Join date : 2009-06-09
Age : 109
Location : East PA
quarterflash likes this post
Re: LT1 cooling system expansion tank
Hi 948, many thanks for your reply. I understand and agree with what you have said.
However, I just want to be clear.
In a 95 Corvette (where my engine was originally) there is a black tank at the top of the engine bay and another white tank lower down. I believe the black top tank is called a surge tank and the lower white one an expansion tank and they are connected to each other with a strong hose as they operate at coolant system pressure.
They operate as you say between hot and cold engine temps transferring the coolant as required.
However, in my Porsche there is no coolant transferred from the top tank to the lower except when the system has been flushed and there is still air to expel. I have found that the only time that coolant is expelled is when the top tank burps out air and carries some coolant with it. Once all the air has been expelled then the lower expansion tank neither receives nor returns any coolant.
I will continue to retain the lower tank just in case.
The above is my understanding and observation of my system but, of course, other cars and V8 swaps may react differently.
Q
However, I just want to be clear.
In a 95 Corvette (where my engine was originally) there is a black tank at the top of the engine bay and another white tank lower down. I believe the black top tank is called a surge tank and the lower white one an expansion tank and they are connected to each other with a strong hose as they operate at coolant system pressure.
They operate as you say between hot and cold engine temps transferring the coolant as required.
However, in my Porsche there is no coolant transferred from the top tank to the lower except when the system has been flushed and there is still air to expel. I have found that the only time that coolant is expelled is when the top tank burps out air and carries some coolant with it. Once all the air has been expelled then the lower expansion tank neither receives nor returns any coolant.
I will continue to retain the lower tank just in case.
The above is my understanding and observation of my system but, of course, other cars and V8 swaps may react differently.
Q
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: General Mechanical
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