<html><body><div>I'll check out the tabs to see if they are in good order or not.</div><div><br data-mce-bogus="1"></div><div>As for the cap, the one I was using is 1" deep, and the new one I bought yesterday at British Motorsports is also 1" deep</div><div>.</div><div class="x-apple-signature"><pre style="font-family: 'SFNSText','Helvetica Neue', Helvetica, sans-serif; font-size: 15px; white-space: pre-wrap; word-wrap: break-word;" data-mce-style="font-family: 'SFNSText','Helvetica Neue', Helvetica, sans-serif; font-size: 15px; white-space: pre-wrap; word-wrap: break-word;">Rye
PH: 530-FIND-RYE</pre></div><div><br>On Jun 20, 2017, at 10:14 PM, Randall <TR3driver@ca.rr.com> wrote:<br><br></div><div><blockquote type="cite"><div class="msg-quote" lang="EN-US" link="blue" vlink="purple"><div class="Section1"><p class="MsoPlainText"><span size="2" face="Courier New" data-mce-style="font-family: 'Courier New'; font-size: small;" style="font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt;" data-mce-style="font-size: 10.0pt;">> If 220 is enough to cause a boil over, I’d think the capture bottle would</span></span></p><p class="MsoPlainText"><span size="2" face="Courier New" data-mce-style="font-family: 'Courier New'; font-size: small;" style="font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt;" data-mce-style="font-size: 10.0pt;">> fill up but not unscrew the cap. Then when it cools down it would suck the</span></span></p><p class="MsoPlainText"><span size="2" face="Courier New" data-mce-style="font-family: 'Courier New'; font-size: small;" style="font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt;" data-mce-style="font-size: 10.0pt;">> fluid back into the radiator. I think it’s the radiator cap and plan to</span></span></p><p class="MsoPlainText"><span size="2" face="Courier New" data-mce-style="font-family: 'Courier New'; font-size: small;" style="font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt;" data-mce-style="font-size: 10.0pt;">> replace it.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">The cap should definitely not unscrew itself; even when boiling over. However, the fault may be the radiator neck rather than the cap. There are two little tabs that the cap is supposed to catch on; the tabs may be worn down or torn up (or even deliberately removed).</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">Any radiator shop should be able to replace the neck for you for not much money, but you'll probably have to remove the radiator and they may have to order the neck.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">Another possibility is that you have the wrong cap. The original TR3 radiator takes a special cap that has a longer "reach" between the sealing surface inside the neck, and the top of the neck. IIRC that distance is 1" on a TR3, 3/4" on the vast majority of cars (including later TR4A). If you have installed a short reach cap by mistake, there might not be enough force to keep it latched in place.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">It's best to double-check that distance; as some crazy people (including myself) have had the neck modified to accept a modern short reach cap.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">My experience has been that the supplied original type caps (with the long reach and 4 psi pressure limit) will not work correctly with a recovery bottle; even if you add a seal between the cap and the outer rim of the radiator neck. Apparently, they leak air through the center rivet (but I couldn't make one work even after surrounding the rivet with RTV). What worked for me was to convert to a modern cap designed to be used with a recovery bottle.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">FWIW, I didn't want to clutter up the engine compartment, so I hid the bottle next to the radiator under the RH horn. I like it there, but of course I fill through the radiator neck, not through the bottle cap as it's almost impossible to reach.</span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"><a href="http://s258.photobucket.com/user/TR3driver/media/TS13571L/DSCF0013-2.jpg.html" rel="noreferrer" data-mce-href="http://s258.photobucket.com/user/TR3driver/media/TS13571L/DSCF0013-2.jpg.html">http://s258.photobucket.com/user/TR3driver/media/TS13571L/DSCF0013-2.jpg.html</a></span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;"> </span></span></p><p class="MsoPlainText"><span size="2" color="black" face="Courier New" data-mce-style="color: black; font-family: 'Courier New'; font-size: small;" style="color: black; font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt; color: black;" data-mce-style="font-size: 10.0pt; color: black;">-- Randall</span></span></p><p class="MsoPlainText"><span size="2" face="Courier New" data-mce-style="font-family: 'Courier New'; font-size: small;" style="font-family: 'Courier New'; font-size: small;"><span style="font-size: 10.0pt;" data-mce-style="font-size: 10.0pt;"> </span></span></p></div><style class="existing-message-styles" type="text/css">.msg-quote p.MsoNormal, li.MsoNormal, div.MsoNormal {margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';}
.msg-quote a:link, span.MsoHyperlink {color: blue; text-decoration: underline;}
.msg-quote a:visited, span.MsoHyperlinkFollowed {color: purple; text-decoration: underline;}
.msg-quote p.MsoPlainText, li.MsoPlainText, div.MsoPlainText {margin: 0in 0in 0.0001pt; font-size: 10pt; font-family: 'Courier New';}
.msg-quote @page Section1 {size: 8.5in 11in; margin: 1in 77.95pt;}
.msg-quote div.Section1 {page: Section1;}
</style></div></blockquote></div></body></html>