Question about Chevrolet 1500

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Coolant smell in the exhaust. no "clean" spark plugs. coolant pressurizes and has exhaust gases in it. no oil in the water or water in the oil. runs great for about 20 miles then its low enough on coolant to start getting warm.

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North star? Sounds like head gasket leak, but the key is the exhaust in coolant. There is a test for this...expensive to repair. More than just a gasket.

Posted on Aug 22, 2010


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Posted on Jan 02, 2017


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2 Answers

Can u tell me causes of creamy yellowish oil in the radiator but engin oil is clean.White smoke in start or in cold.Also sweet smell from exhaust.Its 1.3 engine 8v 2000 oil cooler installed.

This sounds like oil in the cooling system. White smoke is an indicator, but is normal when cold >> in small amounts. Large amounts can be head gasket type of leak. Exhaust smell may or may not be a clue, as there is a catalytic converter in the equation. Pressure test the cooling system.

Mar 24, 2016 | Cars & Trucks

1 Answer

The car idle in park for hours,but when drive at high rpm it heats up after a few miles and then smoke come from the exhaust?

Have the coolant checked for hydrocarbons. It sounds like a blown head gasket, but from the cylinder into the water jacket. Under higher pressure the engine heat/exhaust gases will enter into the coolant and pressurize and overheat the system. Then with the additional pressure, water vapor will bleed back into the cylinders and burn off as white smoke. This doesn't seem like a fully blown gasket, but one that has a tiny leak under higher pressure and heat conditions. It will eventually get worse.

Oct 30, 2015 | 2000 Mazda MPV

2 Answers

My car sound rough and smells like burned matches. When I take radiator cap off water comes ruching out. Is my thermostat stuck?

The smell it hot glycol (coolant). Never remove the cap when the engine is either running and/or hot, water will come out no matter what and can potentially be REALLY hot. Try looking for coolant leaks 1st. With the engine dry and cold (best done in the dark ) take a torch and start the engine. The leaks will be shiny and easy to spot. Either a thermostat gasket, split hose or leaking water pump.

Sep 06, 2015 | Cars & Trucks

5 Answers

What are signs and symptoms of a blown head?

white smoke out the tailpipe and the smell of anti-freeze in the exhaust gas. an engine that over heats either only at highway speeds or town driving, when all other things like, rad cooling fan working properly, thermostat is working properly, no external coolant leaks. the spark plugs may show signs of coolant on them. just some things that are indicators.

Feb 02, 2015 | 2009 Ford F-150

1 Answer


Overheating can be "boiled" down to a few issues:
*blockage: Something is stopping or slowing the flow. Main suspect is the thermostat. It is designed to open and close at the proper temperature so as to keep the engine at the optimum temperature range. They have a tendency to lock closed and cause overheating. Sometimes it's random. The blockage may be something like sludge or rust in the radiator or gunk that someone put in that does not agree with it.

*coolant/water loss. A leak somewhere. Blown head gasket, cracked head/block, hose, etc.
*pressure loss. This happens when the water gets to boiling temperature but is kept under control by pressure (pressure resists heat) and then something such as the radiator cap releases the pressure and the temperature rises. The coolant will also leak out and then the overheating will be due coolant loss as well. This is especially true with the Cadillac Northstar. The head bolts allow the head to lift off the block, ever so slightly, and pressurize the coolant system with exhaust gases beyond radiator cap pressure limits. It's usually when you accelerate or put the engine under load such as going up hill.

^check for exhaust gases in the coolant. smell it or buy a kit to test.
^get a new thermostat, or, test the old one by boiling it in water on the stove; see if it opens. I always get the "failsafe" kind: fails in the open position.
^check for oil in the coolant or coolant in the oil: grey sludge.
^check for leaks on the ground.
^test the radiator cap. some part stores have a way to test them.
^check to see if it's made by Cadillac. look for the word Northstar. If so, hold on to your wallet. There's a whole new world of overheating adventures.

Oct 27, 2013 | 2001 Oldsmobile Alero

7 Answers

Working on a 1997 grand caravan 3.8L replaced the water pump replaced electric fans new thermostat did rad flush and and made sure there was no air pockets still over heats

White steam/smoke coming out exhaust, oil in radiator, coolant in oil, smell of exhaust coming out the radiator, spark plugs wet with coolant, a coolant pressure test would confirm bad head gasket.

Sep 12, 2011 | 1997 Dodge Grand Caravan

3 Answers

Can't keep coolant level up not leakin that i can

Hello cranky48also,

A very common problem with the 4.3 engine is the intake manifold gasket. The coolant will leak into the intake ports and be blown out the exhaust and you may not see it or it may also leak into the engine and fill your oil pan. Often you can see the signs at the front of the engine where the intake, head and engine block meet, check both sides.

If it is not apparent there you will need to do a coolant pressure test to find the leak.


Mar 06, 2011 | 2001 Chevrolet Blazer

1 Answer

I have a honds civic 1.5 lsi, which ever sinse i put oil in it (10w 40) has had lots of white thick smoke coming from the exhaust and got oil on the spark plugs, i changed the plugs and within a few miles...

You may have put in too much oil. Check the oil level dipstick and see if the oil level is above the full mark. If so, you'll have to drain some out until it is down to the full mark. Too much oil will block engine crankcase venting passages and lead to pressurization of the crankcase.

If the oil level checks out okay, check for a stuck positive crankcase ventilation valve (PCV). If the crankcase cannot vent blowby gases, it will pressurize and oil will be forced past the intake and exhaust valve guide seals causing heavy oil burning. The engine will also run terrible.

Mar 05, 2011 | Honda Civic Cars & Trucks

2 Answers

Head gasket

Typical symptoms of a blown headgasket may include: -bubbles of air coming up into your radiator (remove cap before starting) -leaking radiator -milkshake colored oil -overheating -rough running -coolant or oil running from head -spark plug(s) that have a green tint (if green coolant). -white colored or sweet smelling exhaust, white smoke of your tail pipe, or loosing coolant through your overflow

Dec 22, 2009 | 1989 Chevrolet S-10 Blazer

1 Answer

I have an Isuzu rodeo '97 v-6 , it's tapping,but not loud uses tiny bit of oil. when i crank it in the morning it smokes but not from oil usage..its steam..smelling of coolant...takes a long time to stop...

The tapping is possibly sticking lifters or damaged rocker arm shafts. The steaming and coolant smell maybe a leaking head gasket or worst a cracked cylinder head. If you have a coolant pressure tester you can remove all the spark plugs and then apply pressure to the cooling system. Leave it set with pressure applied for 15 min. then spin the engine over with the starter and see if there is water coming out of the spark plug holes.

Sep 28, 2009 | 1997 Isuzu Rodeo

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