Originally Posted by 11JeepLTD
Anyone have common issues with the 2009 4.7L? From the reading I have done it doesn't look like HG are an issue unless the vehicle has been overheated extremely bad. No signs of the HG being a problem. My wife and I are really concerned about the coolant smell. It's going to be a vehicle for her and don't want to make a mistake buying it and it crapping out on us. I'm going to see if they will let me take it to a mechanic to have it looked over. In the mean time if you guys have had or heard of similar issues let me know.
If they DON'T allow your mechanic to give it a good inspection/test, run, do not walk away.
The coolant smell could be due to many things where a good mechanic could point out the ones useful for negotiating price as opposed to those which should make you walk away.
- hoses soft, old. No biggie, just rehose it which is a good idea on a used jeep anyway.
- water pump weeps. Rarely causes a notable smell unless you are a bloodhound
- thermostat. Just replace it and gasket.
- radiator. the plastic tanks have a bad habit of cracking down at the bottom.
Here, you would see wetness along the frame member under it.
As long as the engine has good compression, aftermarket radiators
are plentiful, although a tad of a pita to swap. Drop the price a few
hundred or walk.
- Heater core. Lift the carpet under the heater assy on the inside. Any wetness
would be a red flag, and it is a tad more of a pita to replace. Ask
the mechanic how much....
-- heater hoses... same as radiator hoses.
-- freeze plug. More of a red flag that something is not taken care of than any big
deal to fix.
-- radiator cap more common than you'd think.
-- overflow bottle. Nasty habit of almost invisible cracks, pluggable with a GOOD glue gun or just replace. Check the hose to it.
Definitely run an engine compression check to make sure it isn't something horrendously expensive. A simple pressure test, with dye, of the cooling system
should be reasonably good for anything else.
Always figure on spending about 10% of the purchase price to bring a used vehicle up to snuff.