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I replaced the upper and lower radiator hoses on my mother in laws 2009 aveo. It ran fine then she broke down on the highway so I had it towed to my house It turns over but wont start. code reader found p011,p0014,p00b7,p0507,p0700. could a blown head gasket have caused these codes I see no leaks and oil and antifreeze clean.
I'd check to see if the timing belt snapped. A bunch of those codes have to do with timing.
I just removed the top cover and the belt seems fine and everything turns ok.
Do you have spark?
How do I check for spark since the coil pack covers all 4 plugs
Pull a spark plug, attach the plug wire and ground the plug to the engine. Have somebody crank the engine and observe the the plug.
One easy way is to pull each wire and connect to an extra grounded plug. But if you want to make sure the actual plugs in the vehicle are also ok, you would need to pull each one and check them the same way. You might consider pulling the Cam position sensors to check and clean them. There's 2 of them in the second gens, and I don't know if removal/install is as easy as with the first gens.
Are the codes listed in the order that they were displayed by the code reader? What caused you to replace the heater hoses, and has there been any other recent work done?
Yes thats the way the codes were listed also the hoses blew one by one. and the thermostat housing was also changed about a month ago and 3 months ago a new coil pack. I will try to clean the sensors and see what happens. and yes there is spark.
Second Gen US Aveos (09+) do not have spark plug wires, they are coil-on-plug.Quote:
Originally Posted by thankful_ragamuffin
Yeah, I'm an old school guy with a first gen - wasn't thinking Ecotec.Quote:
Originally Posted by EAD15
I would think the sensors were dry and the warm up sensor kicked in and over advanced the engine (since it is summer).
ok I did a compression test and I got a reading of 70.50.50.80
You have a tough one there to diagnose. Do you know how it was running in the hours just before it quit? On one hand the codes might point to a timing-related problem which is causing the low compression. But OTOH those codes might have been set as the engine started missing badly and was shutting down. And the blown rad hoses tends to be related to a possible HG problem as well. But you really would like to confirm the HG before tearing it down. The problem with that is it usually takes a combustion gas test to confirm the bad HG, and I don't think that can be done just cranking it.
If you're planning to DIY this and if you have a few days to wait, one possibility is to send a sample of the coolant and the oil to a lab for analysis (Blackstone is one, but there are others as well). That should tell you if the fluids have crossed over, and by how much. Of course you could also just tear it apart and install a new HG, if you have the time and the know-how. I'm just another shade tree guy, and would be interested to know how a shop goes about the diagnosis, if you go that route.
That compression test seems a bit low.
that compression is really low. one thing about the newer antifreeze, it mixes with oil. not the same properties like its still a bad thing, but visually you can not really tell. How is the oil level? is it climbing? is the coolant going down?
it sounds like you have a blown head gasket, how did you do the compression test?
Quote:
Originally Posted by avguy
cylinder leak down test.
I used a compression gauge in each plug hole and cranked it over for 10 seconds
if you have been cranking it over and over without it running, put a squirt of oil in each cylinder and retest the compression. See what the numbers change to.
How did the car break down on the highway? did she drive it until it stopped or did the steam of the broken hose stop her?
Either way sounds like you might have warped the head/blew the head gasket.
I replace the hose a week before it broke down. She was just driving to work on the highway and said it just shut down. I will not start at all.
I think rabbit is correct. Excessive pressure in the cooling system and low compression are not a good combination. If you remove the oil filler cap, check for condensate underneath and take a little of it in your finger and taste it. If it is sweet, antifreeze is present in the oil and that in conjunction with your other symptoms will confirm the head gasket.Quote:
Originally Posted by petrified.rabbit
ok thanks I will give it a shot. I dont really want to tear it all apart but I guess it is worth it then driving her to work everyday.