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Old 11-27-2011, 10:38 PM   #1
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Water in oil 454

Will it be the head gasket ? Checked the coolant looks like the level is the same as before we left
Oil is a creamy dirty white
We drove about 300 miles over this weekend
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Old 11-27-2011, 11:05 PM   #2
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Will it be the head gasket ? Checked the coolant looks like the level is the same as before we left
Oil is a creamy dirty white
We drove about 300 miles over this weekend

Maybe maybe not, but you better hope it is a gasket. if not the other possibitlys are more money
Like a cracked head or a cracked block.
THere are more possibiltys now that I think about it.
I'm sure you have a trans cooler on one tank of the raditor but
Do you know if you have a engine oil cooler in the other tank?
Trans cooler susually have 5/16ths or 3/8ths lines.
Engine oil coolers have 1/2 or 5/8ths aluminum lines on them.
If on of these coolers goes bad the engine coolant ans engine oil can mix.
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Old 11-27-2011, 11:32 PM   #3
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Maybe maybe not, but you better hope it is a gasket. if not the other possibitlys are more money
Like a cracked head or a cracked block.
THere are more possibiltys now that I think about it.
I'm sure you have a trans cooler on one tank of the raditor but
Do you know if you have a engine oil cooler in the other tank?
Trans cooler susually have 5/16ths or 3/8ths lines.
Engine oil coolers have 1/2 or 5/8ths aluminum lines on them.
If on of these coolers goes bad the engine coolant ans engine oil can mix.
Yes but the oil goes into the coolant because the oil pressure is higher than the coolant pressure. Then the radiator water looks oily.

Try changing the engine oil and running the vehicle around on a short highway trip and check the engine oil level several times. See if it gets milky looking on the stick. If so, then coolant is definately getting into the oil. Usually it is the gasket, and not the head or block.

Check the radiator water too.
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Old 11-27-2011, 11:38 PM   #4
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Yes but the oil goes into the coolant because the oil pressure is higher than the coolant pressure. Then the radiator water looks oily..
You are correct ,....till you turn the engine off, then till the engine gets back to ambeint temp the coolant pressure is higher than the oil pressure.

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Try changing the engine oil and running the vehicle around on a short highway trip and check the engine oil level several times. See if it gets milky looking on the stick. If so, then coolant is definately getting into the oil. Usually it is the gasket, and not the head or block.
Check the radiator water too.
This is the good way to check it.
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Old 11-28-2011, 05:40 PM   #5
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Will it be easy to replace the head gasket ? I have done one on a small car but have not work on a engine this big
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Old 11-28-2011, 05:57 PM   #6
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Will it be easy to replace the head gasket ? I have done one on a small car but have not work on a engine this big
I promise not help, that should make it easier. Some of the others can give you a better idea of what you're getting into.
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Old 11-28-2011, 08:36 PM   #7
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What year is your 454? If it is newer than 1996 they have a problem with intake gaskets they can leak coolant on the ends of the gasket and it can get into the crankcase.
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Old 11-28-2011, 10:09 PM   #8
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It is a 1992 454
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Old 11-28-2011, 10:42 PM   #9
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Is this white creamy deposit just on the inside of the oil filler cap or is it on the dipstick end?????? Can you be very specific on where you are seeing it?
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Old 11-28-2011, 11:07 PM   #10
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If it is water it is likely due to condensation. A lot of stop and go driving for short distances will not allow the engine to fully warm up and get rid of the moisture. Change the oil and give it another good run.
Anti freeze is a whole 'nuther ball game. Have the cooling system pressure tested before you start ripping stuff apart.
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Old 11-28-2011, 11:50 PM   #11
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It is on the dipstick
In the summer when it was 100+ outside it started to over heat got it fix changed the thermostat rewired the cooling fan to a switch on dash it stays about 210 to 230 on the new gauge
Will take pic of dipstick tomorrow after work
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Old 11-29-2011, 12:22 AM   #12
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The overheating makes it sound more like a head gasket or warped head.
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Old 11-29-2011, 06:26 AM   #13
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Is this an aftermarket temperature gauge with it's own sending unit?. My experience is that the GM dashboard gauges are not very accurate. Also, my GM gauges always read lower than the real temperature. 210 - 230 seems very high. I have a Scangauge and it reads 193 - 198 on level ground, but 205 - 210 after a hard pull up a long hill. This is while towing a 5000 lb car trailer.

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...it stays about 210 to 230 on the new gauge...
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Old 11-29-2011, 07:39 AM   #14
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Quote:
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Is this an aftermarket temperature gauge with it's own sending unit?. My experience is that the GM dashboard gauges are not very accurate. Also, my GM gauges always read lower than the real temperature. 210 - 230 seems very high. I have a Scangauge and it reads 193 - 198 on level ground, but 205 - 210 after a hard pull up a long hill. This is while towing a 5000 lb car trailer.
Has its own sending unit
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