Originally Posted by glazierlaird
Actually I do watch my gauges. The temp does not spike until it's too late. The jeep had lost power this week I immediately checked the temp and it was normal. I pulled to the shoulder and slowed and watched the temp it stayed normal then straight to red warning light. On the road you could see the trail of antifreeze so the hose blew before the heat went up. I have read other posts about air locks in the rad but have not seen anything on rads that blew or hoses blown off because of it. Because of the problems I have had in the past I check the fluid levels weekly. For the last 10-12 months it has stayed at the correct level with no need to add. I don't see how an airlock could develop after that amount of time without something like a head gasket leaking.
If it ran for some time it must have finally purged any air in the system if any existed. If the coolant levels never changed in the overflow tank then we might assume that the cooling system was filled/purged properly.
That is ran well for some time then just blew a rad hose...was it always the upper hose? And you have blown up a few radiators also.
This indicates to me that the cooling system is building up way too much pressure. What pressure range is the rad cap? Caps are rated for sea level pressure. IIRC the rating for your engine would be 12 - 15 lbs but I would verify that on your own.
Do you live at a higher altitude? At a higher altitude you need a higher pressure cap to compensate for the elevation.
The pressure raises the boiling point of water. That is why when you remove the cap the damn radiator 'geysers' on you.
At higher altitudes you need more pressure but that poses a stress problem also doesn't it.