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RE: What is the expansion tank for on the old 390's?
By Gerry Proctor - 03/16/2004 6:51:18 AM; IP 207.133.188.254
The expansion tank was used on engines where the radiator height was lower than the engine height. Pretty common on Thunderbirds with a low front hoodline.

If there was no tank, it would be impossible for the coolant to fill into the heads. And even if you could get coolant into the heads through burping the system, the expansion space would still quickly occur in the heads and create massive steam pockets.

Don't use the tank on a chassis that doesn't require it. It will be useless and create another path for things to go wrong.
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Collapse <a href=../ForumFE/reply.aspx?ID=20709&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20709" onclick="return false;">What is the expansion tank for on the old 390's?</a>&nbsp;-- <font color=#0000ff>Steve M, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20709', contentMargin: 60, icon: $('anchor20709') }); </script>  What is the expansion tank for on the old 390's? -- Steve M, 03/16/2004
Collapse <b>RE: What is the expansion tank for on the old 390's?</b>&nbsp;-- <font color=#0000ff>Gerry Proctor, <i>03/16/2004</i></font>RE: What is the expansion tank for on the old 390's? -- Gerry Proctor, 03/16/2004
Collapse <a href=../ForumFE/reply.aspx?ID=20714&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20714" onclick="return false;">Could that be why my radiator spits all the time?</a>&nbsp;-- <font color=#0000ff>Steve M, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20714', contentMargin: 60, icon: $('anchor20714') }); </script>  Could that be why my radiator spits all the time? -- Steve M, 03/16/2004
Collapse <a href=../ForumFE/reply.aspx?ID=20716&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20716" onclick="return false;">It could be the wrong type of cap.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20716', contentMargin: 60, icon: $('anchor20716') }); </script>  It could be the wrong type of cap. -- Dave Shoe, 03/16/2004
 RE: It could be the wrong type of cap. -- Steve M, 03/17/2004
Collapse <a href=../ForumFE/reply.aspx?ID=20715&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20715" onclick="return false;">old style motormounts used the expansion tank.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20715', contentMargin: 60, icon: $('anchor20715') }); </script>  old style motormounts used the expansion tank. -- Dave Shoe, 03/16/2004
 RE: old style motormounts used the expansion tank. -- giacamo, 03/16/2004
Collapse <a href=../ForumFE/reply.aspx?ID=20718&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20718" onclick="return false;">RE: old style motormounts used the expansion tank.</a>&nbsp;-- <font color=#0000ff>Travis Miller, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20718', contentMargin: 60, icon: $('anchor20718') }); </script>  RE: old style motormounts used the expansion tank. -- Travis Miller, 03/16/2004
Collapse <a href=../ForumFE/reply.aspx?ID=20720&Reply=20709><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor20720" onclick="return false;">Thanks for the update.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/16/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=20720', contentMargin: 60, icon: $('anchor20720') }); </script>  Thanks for the update. -- Dave Shoe, 03/16/2004
 RE: Thanks for the update. -- Travis Miller, 03/17/2004
 RE: What is the expansion tank for on the old 390's? -- jeff, 03/17/2004
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