Gold Lifetime Member
Join Date: Sep 2015
Location: New England/Western Mass
Re: Overflow tank for ‘69 RS?
Update: Had a local show today and happy to say things seemed to have returned to normal. Temp never went above 180 this morning on the way over, and it did get fairly warm this afternoon... maybe 80-5 degrees. So on the way home I took a little joy ride to a local office park and took some pix while the car sat there for 15-20 minutes idling. I checked the temp every now and then and could actually see the gauge change when the thermostat opened and closed. Temp never went past 200, seemed to be cycling between 190-200 just sitting there. I then turned the engine off and watched underneath to see if she'd puke... nothing. So after around 5 minutes, I got in, started her up, temp showed 200 and by time I drove down the entrance about 1/8 mile... temp was dropping from 200 to 190, and 15 minutes later when I pulled in the garage it was between 175-180.
Don't know if the problem is 100% solved, I'll be watching everything carefully, but I'm hopeful that a $7.00 16# cap might've saved the day. While I did buy a new thermostat, the "old" one appears to be working just fine, so I'll stick with it for now.
'69 LeMans Blue Coupe, White Interior, 030" over 454, Super T10 4-Speed, Holley 4150, Pertronix Ignition
CompCams XS274S, 781 Oval Port Heads, PYPES Full 3" SS Exhaust, Hooker Comp Headers, Wilwood Calipers/MC
JGC Steering Box, Helix Uppers/Lowers, ProForged BJs, SpeedHut Gauges, MOMO Steering Wheel, Budnik 17" Wheels