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I am looking at a 2005 Chevy Impala 3.4L that backfires and shuts off after the head gaskets were replaced. The original problem was the head gasket failed and leaked coolant into cylinder number 1. Previously the car ran ok without backfiring. Could the pushrods be at fault since they are different sizes?

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  • bflinn181 Nov 07, 2019

    I'd check compression to be sure all the valves are closing and opening properly since you question push rods. You should also check the timing, often a cause of backfiring.

  • Eduardo Ramirez
    Eduardo Ramirez Nov 08, 2019

    Upon close inspection and dissembly, I found that the rocker bolt stripped out from the exhaust rocker and the compression was shooting back into the intake. Apparently it's a common issue with the 3400 engine.



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I believe 2005 still have a single ignition coil and distributor... yes, plug wire mix up?

Posted on Nov 08, 2019


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  1. If you didn't put them back in the right place, yeah, that would cuase this

Posted on Nov 07, 2019


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Posted on Jan 02, 2017

Jonah Oneal

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SOURCE: 1999 olds alero leaking coolant

problem could be heads bolts . i put new bolts in put a little sealer on them . make sure your bolt holes is clean free from debris. put a lillte sealer on intake gasket on top and bottom where coolants travel. if all was done . drain engine oil in clean container .set it aside. take radiator cap off .you a coolant pressure rise kit .put a pan under oil pan with drain plug still off .pressure your radiator about 10 psi. make sure you have antifreeze in radiator and engine . when you pressure up to 10 psi look under the car if coolant comes out oil pan. you got leaking head gasket. if not .put oil pan plug back on . put oil back in car . check your freeze plugs also.

Posted on Mar 17, 2009

Sheldon Dedek

  • 909 Answers

SOURCE: 2000 camry. blown head gasket (daughter drove car

Yes, you can, but not exactly recommended. If you are going to go that deep into it, then might as well do everything else. However, being unemployed tends to have a negative impact on the wallet....

I suspect it is more than just rings. I think that the walls have been scored badly as well. You may be able to use a borescope to take a peak into the cylinder through spark plug hole. Move the piston to bottom of stroke, and see what you can see. If scarred, much work will be needed. If hatches look alright, then you might be able to get away with just rings.

What kind of compression are you getting on #1 vs #2? This also might be a blown headgasket into an oil passage, or the head (perhaps block?) is ever so slightly warped in this area.

Posted on Aug 29, 2009

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  • 1 Answer

SOURCE: Head gasket is damaged. 2005 Nissan Sentra, 1.8

i have a 2005 1.8 nissan sentra.i rplaced the radiator becuause it was when i did i took it for a test drive and the needle went to hot then back down to middle ways between the C & H BACK IN i replaced the thermostat. now as far as i can tell it is staying in the middle of C & H. i can't feel no water though cerulating through the top or bottom hose of the radiator. so now that i told you what i done so far my question is???? ( my heater is not working in the car it is blowing out cold air & i left the car runnng for about 45 min. even took it up and down the road.still cold air.what do you think i need to do?????????? )

Posted on Jan 07, 2010

Geoff Walton

  • 819 Answers

SOURCE: I have a 1997 Chevy Malibu that is over-heating.

if you do not turn the a/c on, do the fans cycle? turning on the a/c will signal fan demand - this indicates the the fan and circuits are OK. if the fan cycles with the a/c off, we can move away from a fan issue. if not, look into that. have you tested the rad cap? i believe this model has one cap on the expansion tank and no rad cap, if i remember correctly. i have actually run into one of these cars where an incorrect cap was installed, causing similar symptoms. it sounds as if you know what you are doing, but is there any possibility that there is an air lock in the cooling system? if there is heat coming out of the vents when the car is hot, there is probably no issue there, and also likely means the waterpump is ok. let me know and we'll talk later if necessary, good luck!

Posted on Apr 02, 2010

Owen Barnes

  • 867 Answers

SOURCE: 1987 toyota pickup with 22r keeps blowing head gasket

Your head bolts are stretched, when it got hot it weakened the metal in the bolts which means that the bolts cannot hold the needed tension on the head. Replace the bolts and you will stop blowing head gaskets. Also use Genuine Toyota head gasket, It will be a bit dearer but they are much better than aftermarket options.

Posted on Mar 07, 2012

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