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<div dir="auto"><font face="sans-serif">Hi John. Rationale for not bringing fluid level too high is dual: 1) sloshing; 2) liquidxheat expansion.</font></div><div dir="auto"><font face="sans-serif"><br></font></div><div dir="auto"><font face="sans-serif">On several old cars the steel caps tend to corrode from the fluid contact over time. Some rubber gaskets better than others. </font></div><div dir="auto"><font face="sans-serif">Old timers trick was making gaskets out of old tubes.</font></div><div dir="auto"><font face="sans-serif"><br></font></div><div dir="auto"><font face="sans-serif">Another trick I have resorted to is to super clean the inside treads of the cap. Super clean the Reservoir casting threads. Schmear heavy motor oil or lithium grease on cylindrr casting threads. </font></div><div dir="auto"><font face="sans-serif"><br></font></div><div dir="auto"><font face="sans-serif">Schmear RTV on threads of the steel cap. Gently tighten cap 'slightly less hand torque than usual'</font></div><div dir="auto"><font face="sans-serif"><br></font></div><div dir="auto"><font face="sans-serif">RTV acts like a 'side gasket'. Really cuts down on the weepage.</font></div><div dir="auto"><font face="sans-serif"><br></font></div><div dir="auto"><font face="sans-serif">On my TR4, the placement of the brake & master clutch cylinders on 'the shelf' vs later TR6 front panel below shelf has caused shelf paint to wrinkle so no longer 'Concours'. Why some have painted those shelves black or used battery acid resistant coating vs body color.</font></div><div dir="auto"><font face="sans-serif">Brake fluid very corrosive to paint.</font></div><div dir="auto"><font face="sans-serif">Why some Concours car owners went to silicone D0T 4 ( or is it D0T5.</font></div><div dir="auto"><font face="sans-serif">Anyway RTV is a very useful 'tool'.</font></div><div dir="auto"><font face="sans-serif">Sherman </font></div><div dir="auto"><font face="sans-serif">TR4 CT50054L (Original owner)</font></div><div dir="auto"><font face="sans-serif">Columbia MD </font></div><div id="composer_signature" dir="auto"><div style="font-size:85%;color:#575757" dir="auto">Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone</div></div><div dir="auto"><br></div></body></html>