Question about 2002 Nissan Sentra

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My head gasket is leaking, how long can i drive before having serious problems, dealer wants $1200 to fix!

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It depends -- I drove a chevy station wagon from Pennsylvania to northern Minnesota with a badly leaking head gasket and still drove it thereafter by having to constantly fill the radiator with water. You could try a cooling system sealant if you are leaking a lot of water and an engine oil sealant would possibly help to extend its longevity.

Keep looking for a better price along the way -- it is a straightforward repair, you just have to remove a lot of parts to get at it.

Posted on Nov 02, 2010

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Posted on Jan 02, 2017

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2002 Subaru outback is leaking antifreeze and not heating up.


This is common issue early sign head gaskets failure for EJ251 SOHC engine for external coolant leak. Second gen 96-99 with EJ25D is worst because when head gaskets failed, it's an internal leak that allows coolant and oil mix together in the combustion chamber to destroy engine.
You can drive it for at least 6 months or more as long as you keep top up coolant since the leak should be small at a slower rate leak. I drove mine for a while before change head gaskets. You're looking at `$1000-1200 job a dealership since you might as well change the timing belt, water pump, idlers while engine is pulled to replace head gaskets.

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- Could possibly be worn or blown head gasket. Cracked head worst case. Pretty expensive fix either way if taken to a shop or dealer, but can be taken care of. If driven too long or hard, seal or head could fail further mixing your coolant, oil and gas causing serious damage to your engine.
- Best case, check your freeze plugs, one or more may need replacing. They are pretty cheap and fairly easy to replace, and can be acquired at your local auto parts store.
- To prevent future problems with this, you can take precautions by replacing your thermostat, changing coolants to 50/50 anti-freeze, and flushing your radiator. I would NEVER use stop-leak, as it may fix leaks with your radiator and/or other components, but can cause other blockages internally inside your engine. Also, check your hoses for cracks and pinholes or leaks. Hope this fixes your problem.

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1997 Nissan 300x, mechanic said exhaust leaking into cooling system and needs replacement engine. Any other things to check before doing that?


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The "Check Coolant Level" light


no heat to the interior of the car indicates a closed thermostat-the coolant level warning is controlled by the sensor in the surge tank, it is either disconnected or malfunctioning. cleaning the tank itself can sometimes get it working again, or look for another in a local junkyard (much less expensive than the dealer). Your overheating can very well be due to the thermostat, so changing it might solve a couple of problems-and the Northstar engines do have head gasket problems due to streaching head bolts that also damage threads, a permanent repair is to replace the head bolts with 'timesert' :

http://www.timesert.com/

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When i put my car in drive and let off the brake the car will take off without me even pushing the gas pedal. it will go from first to second with no foot on the gas.


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Starting problem


Sounds like the garage didn't do something correctly.

Apparently heads are a serious problem for BMW.

http://www.usautoparts.net/bmw/parts/bmw-head-gasket-world.htm

Here's a brief history and an unofficial description of BMW's position on their head problems:

http://www.unofficialbmw.com/all/engine/all_m42_profile_gasket_faq.html

Here's a step-by-step on the Timing Case ProfileGasket (aka, the head gasket) replacement for reference so you can see what should have been done:

http://www.pelicanparts.com/bmw/techarticles/101-Projects-17-Head-Gasket/101-Projects-17-Head-Gasket.htm

However, the good news is that the difficulty starting and the fuel leak may be just the result of a clumsy re-assembly in fuel delivery bar. Check out:

http://forum.ih8mud.com/80-series-tech/285535-fixed-head-gasket-but-now-have-fuel-leak.html

Now doesn't replacing a few O-rings sound better than having to tear the head off again? :-)

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