Engine Cooling problem
1984 Nissan 300ZX 6 cyl Two Wheel Drive Manual 139000 miles
I have a heater core leak. I capped off both ends on the engine side to bypass. All of the connections are also capped at the firewall with rubber caps and clamps. My question is: Is it a must or a requirement to install an aftermarket bypass hose or can I leave the ends capped off?