Oil in my coolant

dhashigu · 08-07-2007, 06:48 AM

i have a 96 fullsize chev, 2x4 with a 305. My friend borrowed my truck on the last week, and blew the belt, and continued to drive it for about 3 km, or so. when he got to my house i looked at the temp gauge and it was maxed out. I changed the idler pulley and tensioner and put a new belt on it. it appears to runs ok, but i noticed oil in the coolant. i do not know if this is a new development, since i have not check the coolant for atleast 5 months. there is no coolant in the oil (yet) but it does seem like the coolant is disapearing now too. i went out of town on the next day so i did not get a chance to monitor it.
is this a cracked block?, or is there pressurized oil in the head?
Any ideas?

bradrhale · 08-07-2007, 06:56 AM

could be several differant things. block, blown headgasket. how low is the oil?? is it missing quite a bit of oil?? how often are you adding water?? i think your friend needs to have his but kicked.

dhashigu · 08-07-2007, 07:04 AM

I havn't had much of a chance to drive it, since i was out of town on the weekend. but the oil does not really seem to be droping at any significant rate

dhashigu · 08-07-2007, 07:07 AM

i swap vehicles with my mom on the weekend, to go on my trip, she put about 150km on the truck and the coolant droped about 6 inches, and the oil level seems to be at the same spot as when i left. oh yeah, i changed the oil when i changed the belt and pulleys

mrjohnwayne · 08-07-2007, 08:54 AM

Is the truck overheating?

75K30 · 08-07-2007, 09:07 AM

pretty common for 305 to crack heads when they get way overheated. Chances are that the coolant is getting out through a cylinder, and leaving from the exhaust pipe.
If you get lucky it may just be a head gasket, but it will have warped the head pretty bad.

dhashigu · 08-07-2007, 10:13 AM

The truck does not overheat, infact the temp never gets above 70 now. i'm thinking the thermostat is toast

scottie · 08-07-2007, 10:20 AM

are you sure its not tranny fluid? the tranny cooler is inside the radiator and is notorious for cracking. check your oil and tranny fluid to see if theres any coolant in either if them....

scottie · 08-07-2007, 10:22 AM

if it is your tranny cooler (my guess), your prob gonna be in for a new radiator and and tranny overhaul.

dhashigu · 08-07-2007, 11:21 AM

the trany fluid is still nice and red, with no signs of coolant in it (that i can tell). the Coolant has, what looks like, a layer of chocolat sirup floating at the top.

08-07-2007, 06:48 AM	#1
dhashigu Full Member Join Date: Jul 2007 Posts: 29	Oil in my coolant i have a 96 fullsize chev, 2x4 with a 305. My friend borrowed my truck on the last week, and blew the belt, and continued to drive it for about 3 km, or so. when he got to my house i looked at the temp gauge and it was maxed out. I changed the idler pulley and tensioner and put a new belt on it. it appears to runs ok, but i noticed oil in the coolant. i do not know if this is a new development, since i have not check the coolant for atleast 5 months. there is no coolant in the oil (yet) but it does seem like the coolant is disapearing now too. i went out of town on the next day so i did not get a chance to monitor it. is this a cracked block?, or is there pressurized oil in the head? Any ideas?

08-07-2007, 08:54 AM	#5
mrjohnwayne Senior Moderator Join Date: Apr 2005 Location: Texas Posts: 3,722	Is the truck overheating? __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

08-07-2007, 10:20 AM	#8
scottie Senior Member Join Date: Jan 2006 Location: South Florida (Palm Beach), originally from south of BOSTON Posts: 644	are you sure its not tranny fluid? the tranny cooler is inside the radiator and is notorious for cracking. check your oil and tranny fluid to see if theres any coolant in either if them.... __________________ im a straight shooter with upper management written all over me

08-07-2007, 10:22 AM	#9
scottie Senior Member Join Date: Jan 2006 Location: South Florida (Palm Beach), originally from south of BOSTON Posts: 644	if it is your tranny cooler (my guess), your prob gonna be in for a new radiator and and tranny overhaul. __________________ im a straight shooter with upper management written all over me

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

08-07-2007, 06:56 AM	#2
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	could be several differant things. block, blown headgasket. how low is the oil?? is it missing quite a bit of oil?? how often are you adding water?? i think your friend needs to have his but kicked.

08-07-2007, 07:04 AM	#3
dhashigu Full Member Join Date: Jul 2007 Posts: 29	I havn't had much of a chance to drive it, since i was out of town on the weekend. but the oil does not really seem to be droping at any significant rate

08-07-2007, 07:07 AM	#4
dhashigu Full Member Join Date: Jul 2007 Posts: 29	i swap vehicles with my mom on the weekend, to go on my trip, she put about 150km on the truck and the coolant droped about 6 inches, and the oil level seems to be at the same spot as when i left. oh yeah, i changed the oil when i changed the belt and pulleys

08-07-2007, 09:07 AM	#6
75K30 Senior Member Join Date: Jul 2006 Posts: 2,992	pretty common for 305 to crack heads when they get way overheated. Chances are that the coolant is getting out through a cylinder, and leaving from the exhaust pipe. If you get lucky it may just be a head gasket, but it will have warped the head pretty bad.

08-07-2007, 10:13 AM	#7
dhashigu Full Member Join Date: Jul 2007 Posts: 29	The truck does not overheat, infact the temp never gets above 70 now. i'm thinking the thermostat is toast

08-07-2007, 11:21 AM	#10
dhashigu Full Member Join Date: Jul 2007 Posts: 29	the trany fluid is still nice and red, with no signs of coolant in it (that i can tell). the Coolant has, what looks like, a layer of chocolat sirup floating at the top.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
coolant leak	marko	Introductions	1	01-27-2007 04:04 PM
Coolant Flushing ???	tidzu	Chevy Truck Forum	14	01-25-2007 05:29 PM
89 Dodge D350 Coolant Leak question	TheStoneDoor	Dodge Truck Forum	1	07-24-2006 02:59 PM
Coolant Flush Problems	SMarlin40CL	GMC Truck Forum	5	05-05-2006 12:24 PM
coolant quick disconnect broke off in manifold	jchcomputers	Chevy Truck Forum	5	02-06-2006 10:38 PM