Loose Coolant Reservoir Cap
Loose Coolant Reservoir Cap . A loose radiator cap will cause the system not to pressurize, resulting in overheating. Topped the reservoir with dexcool to the full cold line, used a black magic marker over that line so i could see it, tightened the cap and haven't touched it since. Repair Guides Radiator Removal & Installation from www.autozone.com There may be times that the reservoir radiator cap may turn out to be faulty. However, you can always open up the cap and observe the level from the coolant reservoir cap hole. [quote=”riceclout” post=170088]hello everyone, i have an 04 acura tl, the plastic cap on my coolant reservoir cracked a week ago so i sealed it off with some waterproof tape thinking it wasn’t a big deal.