Moderator: volvite
Ah good tip, thanks. I will go check that after I get the kids to sleep. I haven’t noticed any signs of leaks but you never know.VStar650CL wrote: ↑Mon Nov 14, 2022 7:33 pmUsually it means the coolant is a little low. The heater core is one of the highest points in the system on R51's (and the related Frontiers/Xterras), and automotive water pumps don't generate much head pressure. So it only takes a minor loss of coolant to cause the heat to vanish at low RPM.
If it was half a gallon low, then the core may be airbound. You might need to bleed the system.AS_The_Crow_Flys wrote: ↑Mon Nov 14, 2022 11:07 pmPut a little under half gallon in and then did a bit of idling and it got up to around 100 at the upper return tube and I lost patiences with waiting for it to heat up so I took a little drive to warm it up.
Can you provide a picture of that pipe and the spot where it likes to corrode?TooMuchControl wrote: ↑Sun Nov 20, 2022 1:16 pmPut your ear to the glove compartment. Or bette yet, have an assitant in the passenger seat put their ear to the glove box / dahsboard area.
Tap the throttle.
If you hear chirps, you have zee bubbles in the system - air. It's very noticeable if you can get into a garage.
Just let it idle and tap the throttle and you will year what might be a squeaky wheel. One almost thinks it's a squeaky belt noise. Air.
I wonder if you run your rear heater? Our small heater pipes run to the back heater core and sometimes pipes corrode and a leak develops there, right at the frame, above where the muffler and the rear pipe meet. It's a known issue, and I had to fix mine 2-3 years ago. A couple of drops appear on the driveway, but that muffler seems to dry the drops out. Looks for corrosion and green crusty fluid too.
Glad you got it sorted!Zen_master wrote: ↑Sat Dec 03, 2022 2:30 pmSame thing happened to mine. Posted about it on these boards a while ago.
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The heat would fluctuate with the throttle.
After much tinkering, the eventual fix was a failing shutoff valve in the heater hose. Replacement of the HVAC heater hose inlet solved it. This was on the V8 FYI.
Its good that u spotted the bad radiator beofre it became an even bigger prolem ..