how do i go about checking the fan clutch?<br>as for compression, its a stock rg with 44's so how's the compression come into play? you also mentioned bad gasket, which gasket do you mean?<br>i've pulled out the thermostat and undone the bottom hose and ran water threw the system for like 10 minutes, this is the last time I flushed it out and added the water coolant mix.

I think he meant pressurize the sysytem. You pressurize the cooling sysytem and then check for drop which would indicate leak somewhere. Head gasket leak, could cause foamy coolant. I use Prestone super coolant flush. I bought a '71 Crown that was sitting for over 15 years with water in it. Ran the flush through it about three different times and so far all is well. Of course I haven't been able to drive anywhere because I am rebuilding the front end on it and getting the parts has taken months. However, I keep running it regularly. Flush out your block too.

Checking for clutch fan-while engine is running, use a rag to stop the fan blade, do not injure your fingers, the fan should have a heavy load but if it feels to loose, the fan clutch is diffective, replace it. Engine not running-spin the fan by hand, you should feel a load and again it it spins to freely, it is diffective.<br>By checking the compression of your cylinder, you can determine if there is a head gasket leak, loose or worn rings and even a bad exhaust valve.<br>This will produce an internal boil over meaning your are boil off water inside your engine. <br>Again, flush it through the block, these will clear the water passages in the block. Like radiators, water passages in the block can also get clog and rust due to time.