2006-10-28 14:42:31 · 7 answers · asked by sawyerkristine 2 in Cars & Transportation ➔ Maintenance & Repairs
i own a repair shop,and you can check the thermostat ,easy enough,but as far as the block goes you need to look for water in the oil,, or an external leak on it,usually on a cracked block you,ll get water in the oil,or it will crack on the outer part of the block,and you,ll see it leaking from it,if it will start and idle ,you can start it for a minute or two ,and see where its coming from on it,,some times it just a blown head gasket ,good luck with it i hope this help,s.
2006-10-28 14:49:59 · answer #1 · answered by dodge man 7 · 1⤊ 0⤋
Put the thermostat in a pot of water it should open before boiling on older cars on newer ones needs to boil first crack testing is best done by engine reconditioners for accuracy it also could be just the radiator check this by filling the radiator then undo the bottom hose at the radiator the water should spill out fast also when the motor is hot turn it of put your hand all around the core of the radiator it should feel the same heat all over if not the radiator has a part blockage and needs cleaning.
2006-10-28 15:26:38 · answer #2 · answered by john h 4 · 0⤊ 0⤋
A stuck thermostat is easy enough to check, -but you can't tell for sure if it is the block, or the head till you actually have it apart!
There is a "test" kit that checks for hydrocarbons in water, and one that checks for hydrocarbons in oil, -- but you can only guess how it is getting there! Running engine with radiator cap off will let you know if you have a "combustion chamber" leak, - as it will continually blow bubbles in the water as the engine runs (don't take cap off hot radiator- take it off when cool and wait for car to heat up!)
Water leaking into the oil will make the oil look "Milky-brown".On the dipstick it will look "grey and foamy" (pull stick when engine cold)!
From these indications you can get a pretty good idea, but "it ain't over -till it's over", and only taking it apart will definately prove the problem!
In the past 50 years, I have seen cracked blocks thart leaked water into the oil, cracked heads that leaked water into the oil, (and didn't make car overheat). I have also seen blocks cracked between the cylinders that made the engine boil, because the compression leaked and pushed the water out, - the same as a cracked head gasket would! --- And it didn't leak water into the oil!
2006-10-28 15:52:16 · answer #3 · answered by guess78624 6 · 0⤊ 0⤋
You can buy a block test kit from a parts jobber like napa, it is a blue liquid that turns green if exhaust is pulled thru it. I comes with a test bulb that plugs into the radiator and pulls air thru the liquid. be sure the car is cool and that the radiator is down a bit on coolant. this test works very well. You can also look for milky oil. these are indicators of major problems. Good luck
2006-10-28 15:02:20 · answer #4 · answered by Anonymous · 1⤊ 0⤋
If you have a cracked block you will have water in your oil. So your oil will appear gray colored. You can check your thermostat by removing it, but it in a pan of boiling water and see if it opens.
2006-10-28 14:51:44 · answer #5 · answered by Kali_girl825 6 · 0⤊ 0⤋
check oil if water in it will be milky it could be a head gasket also if have water in oil
2006-10-28 15:33:35 · answer #6 · answered by Todd V 2 · 0⤊ 0⤋
see if there is water in your oil
2006-10-28 14:59:28 · answer #7 · answered by Anonymous · 0⤊ 0⤋