<div dir="ltr">I went back and looked at my cap. Everything I've read says that the recovery style caps have two seals; one at the top of the cap and one on the spring loaded part. Here is a photo of my cap. Can I assume that I have a recovery style cap?<div><img src="cid:ii_mtuark1x2" alt="PXL_20260909_160805998.jpg" width="423" height="562"></div><div><br></div><div>Thanks,</div><div>Joe<br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Sep 9, 2026 at 7:00 AM michael king <<a href="mailto:michael.s.king@gmail.com">michael.s.king@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div>Joe. </div><div dir="auto"><br></div><div dir="auto">You describe how the system works..but without a specific recovery cap the water cant get back into the header tank once its out.. it just becomes a catch overflow </div><div><br></div><div>Regards<br><br>Michael King</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 9 Sept 2026, 19:57 Joe Brown, <<a href="mailto:jbbrown1980@gmail.com" target="_blank">jbbrown1980@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I've got the regular pressure cap on the original expansion tank and my understanding was that it would open up if the coolant was boiling over and the excess coolant would then flow into the catch can. And then as the coolant cooled down it would be sucked back into the expansion tank. Do I need some other kind of radiator cap?<div><br></div><div>Thanks,</div><div>Joe</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 8, 2026 at 5:50 PM Gary Winblad <<a href="mailto:winbladgary@gmail.com" rel="noreferrer" target="_blank">winbladgary@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Joe,</div><div>Hopefully you also added the double seal cap? You need that to make it a recovery system, not just a catch can</div><div>With recovery, the overflow is pulled back in during cool down. That is what makes the radiator always full to the top,</div><div>for a few more tubes of cooling.</div><div>Gary Winblad</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 8, 2026 at 3:21 PM Joe Brown <<a href="mailto:jbbrown1980@gmail.com" rel="noreferrer" target="_blank">jbbrown1980@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hey,<div>I added an overflow tank several years ago and I went with one I found on Amazon. It's called an 800ml aluminum expansion tank from BDFHYK and it's around $25. </div><div><img src="cid:ii_mtt8d5r50" alt="image.png" width="562" height="297"></div><div><br></div><div>I wasn't using the remote oil filter, so I mounted this tank in the filter bracket. This tank is slimmer than an oil filter so I had to fabricate a new clamp to secure it. Here is a photo.</div><div><img src="cid:ii_mtt8gxwj1" alt="PXL_20260908_220938306.jpg" width="283" height="376" style="margin-right: 0px;"><br></div><div><br></div><div><br></div><div>Have Fun,</div><div>Joe Brown</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 8, 2026 at 4:51 PM Mark L via Tigers <<a href="mailto:tigers@autox.team.net" rel="noreferrer" target="_blank">tigers@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>
<div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:16px"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold">So, the plastic kit you mentioned will stand up to the heat of the engine compartment okay?<br></span></div>
<br>In a message dated 9/8/2026 5:18:10 PM Eastern Daylight Time, <a href="mailto:winbladgary@gmail.com" rel="noreferrer" target="_blank">winbladgary@gmail.com</a> writes:
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<div>Mark,</div>
<div>IT is worth adding. Cost and trouble are minimal. You can buy a kit at the auto parts store (plastic tank, dual seal cap, tygon hose) for cheap.</div>
<div>Hard to say exactly how much cooling capacity it really adds.. it DOES keep the radiator full to the top, the extra quart doesn't matter.</div>
<div>I put the tank in the wheel well behind the headlight, out of sight, out of the way.</div>
<div>A very important reason to add is that it stops the leak of antifreeze, which is toxic to small animals. When we were in Big Sky for SUNI, we stopped</div>
<div>into a small museum. I will never forget the huge stuffed Condor on display. The placard said he died from driniking anitfreeze from an</div>
<div>overheated car... so sad, he was beautiful rare bird. Please install the system..</div>
<div>Gary Winblad</div>
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<div dir="ltr">On Tue, Sep 8, 2026 at 7:56 AM Mark L via Tigers <<a href="mailto:tigers@autox.team.net" rel="nofollow noopener noreferrer noreferrer" shape="rect" target="_blank">tigers@autox.team.net</a>> wrote:</div>
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<div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:16px"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold">I know some have added an overflow to the expansion tank. This seemingly allow the expansion tank to be filled to the top rather than only 1/2 full. Is the addition of an overflow worth installing? It appears this would add an additional 1 quart to the system. How much difference would this make on cooling?<br clear="none"></span></div>
<div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:16px"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold">Thanks,</span></div>
<div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:16px"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold"> Mark L</span></div>
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