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5.7 350 Chevy, Blown head gasket?

head gasket problems?

5.7 350 Chevy, Blown head gasket?

Postby Dixie4x4 [OP] » Mar 05 2013, 2:07am

i have a 1995 chevy 1500 with the 5.7 350,,, i am trying to figure out wheater or not i have have a bad head gasket and or what is wrong with the truck. first off the truck seems to be running good and performance wise nothing seems odd, but when i start it, white smokes comes out of the exhaust along with small amounts of water out of the exhaust. If i leave it running and rev it up white smoke contiunues to pour out of the exhaust. but if i drive it around the amount of smoke seems to be alot less and sometimes not even noticable,,, i checked the oil and the coolant and nothing seems to be low or out of the ordinary. also it does drip some oil when parked, please let me know what the possibilties might be and how i can go about checking it out. Thanks.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby ASTE25 » Mar 05 2013, 5:01am

An easy way to tell if the head gasket is blown into a cooling passage is to open the radiator cap (while the engine is cold), start the engine and see if coolant is blown out of the radiator neck, or if there are some major bubbles or splashing in the water you can see down it. Does the smoke you see smell sweet like coolant?
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Re: 5.7 350 Chevy, Blown head gasket?

Postby whitty21 » Mar 05 2013, 9:21pm

Is there a milky substance on the inside of your oil fill cap?

As the above poster said there is a distinct smell to coolant, very sweet smelling.

If the coolant seems normal then why are you concerned? check the hot and cold levels at should fall within the lines, or the seem of the tank. Not familiar with the tbi coolant system.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby Dixie4x4 [OP] » Mar 05 2013, 10:35pm

thanks ill have to check that now... i was concerned because the truck has always smoke bad at start up(alot more than the normal) and i have to drive bout 120 miles total a day and was just wondering if it was something of major concern that would cause further damage or not be dependable.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby Dixie4x4 [OP] » Mar 06 2013, 12:58am

ok so i check the levels and everything seems fine, oil looked good along with the coolant,,,, could the white smoke be caused from water getting in through the exhaust? because i had it parked down hill and water may have been getting in through the tail pipe. but it has always smoke at start up in the two years ive had the truck but only recently has it been getting worse.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby whitty21 » Mar 06 2013, 1:04am

Did you check for the white milky substance on the oil cap?

How many km since an oil change?
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Re: 5.7 350 Chevy, Blown head gasket?

Postby ASTE25 » Mar 06 2013, 2:56am

It's not uncommon for condensation to build up in a cool exhaust and steam out (and become visible) when it is cold out. If there is not low coolant condition and the steam does not smell sweet then I'd say it's not coolant and it is just regular condensation.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby Dixie4x4 [OP] » Mar 06 2013, 4:27am

ya i checked the cap and it all appeared to be normal,,, the last oil change was bout a year ago because i have left it sit because it was a spare truck till just a couple weeks ago when i decided to start using it as my main truck again, so since the last oil change bout a year ago it probably has been driven maybe 800 miles at most,,, but im going to do a complete fluid flush tomorrow and see what that brings,,, yes hopefully it is just condensation and nothing more. thanks for the help.
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Re: 5.7 350 Chevy, Blown head gasket?

Postby whitty21 » Mar 06 2013, 4:58am

keep an eye when you are draining the oil, you should be able to see any water draining out do to difference in densities
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5.7 350 Chevy, Blown head gasket?

Postby Machster69 » Mar 06 2013, 5:02am

You can dye the coolant... Makes it super easy to spot if in the oil. Sometimes its only a few drops, without a dye you can miss it! Just be sure to collect it in a bucket you can see...
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