Temperature fluctuation :jigabop
#1
Temperature fluctuation :jigabop
A few months ago I was losing coolant and constant temperature fluctuation. Very noticeable when pulling a trailer, temp needle rode 1/4'' or more over half when going up hills. So I pulled my head off and had it planed down by the local machine shop. He told me he found warpage in the head above cylinders 3 and 4. I put the engine back together with ofcourse a new gasket and ARP head studs. I am now no longer losing coolant but the temperature fluctuation keeps on. when im pulling it gets hot and when im goin easy it goes back down to half (190F). Any ideas? im kinda stumped. thanks.
#2
is your radiator clean?
the puke bottles on these things are notorious for making a huge mess all over the radiator
puke bottle = pill bottle on the end of the PCV hose attached to the front timing cover...
they are supposed to be emptied every oil change, but nobody ever does it. I took the thing off and ran a long hose from the pcv down to the front axle.
radiator ends up getting caked up in oil and dirt as the cooling fan slings all of that oil mist from the PCV around and makes a huge mess...that mess ends up blocking a lot of the radiator.
thermostat can be another possibility. if the tstat isn't opening and closing fast enough it can cause some pretty steep temp changes.
I would check your radiator first...if it is nasty, then go to one of those do it yourself car washes with the pressure washers and go when they aren't busy or really paying attention...
set the pressure washer to tire and wheel mode, and pressure wash the outside of the radiator under the hood...
tire/wheel mode = simple green mixed in with the water.
they kinda frown on degreasing your engine these days, so try not to get caught doing it, or just play dumb and act like you didn't know
bout the best way to clean it short of replacing it.
also make sure your overflow bottle is filled to the proper level and your radiator cap seal is not messed up.
the puke bottles on these things are notorious for making a huge mess all over the radiator
puke bottle = pill bottle on the end of the PCV hose attached to the front timing cover...
they are supposed to be emptied every oil change, but nobody ever does it. I took the thing off and ran a long hose from the pcv down to the front axle.
radiator ends up getting caked up in oil and dirt as the cooling fan slings all of that oil mist from the PCV around and makes a huge mess...that mess ends up blocking a lot of the radiator.
thermostat can be another possibility. if the tstat isn't opening and closing fast enough it can cause some pretty steep temp changes.
I would check your radiator first...if it is nasty, then go to one of those do it yourself car washes with the pressure washers and go when they aren't busy or really paying attention...
set the pressure washer to tire and wheel mode, and pressure wash the outside of the radiator under the hood...
tire/wheel mode = simple green mixed in with the water.
they kinda frown on degreasing your engine these days, so try not to get caught doing it, or just play dumb and act like you didn't know
bout the best way to clean it short of replacing it.
also make sure your overflow bottle is filled to the proper level and your radiator cap seal is not messed up.
#4
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