Get second opinion vapor lock is kind of rare for vehicles because of the evap and fuel pumps ---more than likely problem with your fuel pump module which has vapor {evap} lines as well as vent lines attached to it inside tank i would also check the fuel pump relay it is in the trunk drivers side the relay over heats than pops open shutting off fuel pump --that and check your evap canister may be clogged -dirt or fuel ---
Vapor locks didnt stop in the 60s they can still happen because our gas is becoming more rich those easy to be vapor rised.
You need a different mechanic. Vapor locks stopped in the 60's.
SOURCE: 2002 impala 3.8 liter oil leak-gasket
You can go to;
http://www-odi.nhtsa.dot.gov/recalls/results.cfm
and
http://www.automotive.com/2002/12/chevrolet/impala/recalls/index.html
to look up you car. Lots of recalls. I did not see the oil leak.
SOURCE: Need to replace leaking fuel return pipe on 2005
OH OH need to go to parts store & get a plastic spice line kit order it if you must they do make them make sure it don't leak after repairs good luck working Man
SOURCE: 2005 Chevy Impala...all I did
the lower radiator hose is a return hose and there are no vapor lock issues. If your coolant level is full when you start your vehicle and when it heats up and the system pressurizes your coolant expands with heat and then that excess pressure will go through the overflow outlet to the reservoir and the reservoir has a relief opening near the top to relieve pressure or for excess fluid to come out. If the lower hose is just warm then your water pump may not be circulating properly (be sure to check belt for tension no more than 1/2 inch of play should be present). One messy way to test water pump would be to first drain coolant if it is good to reuse it, then remove the lower hose, open the radiator cap and put a water hose in it and turn on half way. Look at the volume of water coming out and have someone start the vehicle and idle at about 2000 rpm if that volume has not doubled your pump is bad
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Hi Anonymous, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box? I would like to know if your mechanic fixed the leak or did they tell you it couldnt be fixed BECAUSE of vapor lock..
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