boise49ers
NAXJA Forum User
- Location
- Boise,Idaho
My son has a 90 XJ with a closed system. It hasn't really over heated, but it builds so much pressure it has blown 3 plastic coolant reservoirs in 2 days. It had low coolant below the half mark and wasn't over filled. The last 2 were the after market ones, but the first was the factory Jeep GOOD one. What could cause the fast build up of pressure. The gauge reads at operating temp.