I have a 95 Cherokee with the 4.0L She has been running like a champ until about a week ago. I noticed that there has been a small coolant leak, which I traced to the Heater Control Valve, no biggie was probably gonna bypass this. Well my brother borrowed my jeep and said that he couldn't get any heat from it. To me, this sounds like the Heater core? Also The jeep has now be going from 210 then spiking to redline and then cooling off and coming back to the middle around 210, I checked my coolant level and the coolant was baby **** green and just mucky.
1) Does the gross mucky coolant sound like I could of blown the head gasket?
2) how much of a pain is the heater core to change? are we lucky enough just to pull the glove box or is the dash coming out
I would do some testing first. Check your passengers side floorboard for liquid. Flush and fill the cooling system, then have it pressure tested. And a cylinder leakdown test. then you will know where you stand.
'95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
Ok, The jeep smells alittle musty on the inside...I haven't been driving it lately. I've been taking my other car until I had more time to play with it. I'll probably change the heater core for ****s and giggles and do a flush.
Sounds like your core or the flow to it is restriced
Flush the heater core separately. Take off the heater hoses and shove a garden hose in there, top to bottom, bottom to top until all you get is clear water, then put it all back together and flush the whole system. If your heater control valve is still there (if you haven't bypassed it yet) it could be clogged too. It's a restrictive area that can easily get clogged and/or fail. Check the vacuum line to the valve as well.
Changing out the core would certainly be more hassle than flushing and bypassing or replacing the valve it's a bee-otch of a job.
1990 XJ Laredo - White & Chrome
1988 MJ Pioneer - Metallic Green and Black
Thanks for the good advice guys! I'm probably gonna bypass the HCV and flush the system...the jeep was running like a champ before this crap happend. Hopefully after this it should hold up for alittle bit longer...142,000 on the clock and still going! haha