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post #1 of 11 (permalink) Old 09-23-2019, 12:59 PM Thread Starter
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another head gasket

working on third equinox with bad heads. i guess i like doing it. $250 for running rig is ok. if you overlook the heads. front head is off. all exhaust valves are white. been told this is due to ash deposits more so than coolant issues? have not pulled rear head. maybe they will look the same?
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post #2 of 11 (permalink) Old 09-26-2019, 04:47 PM
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for me the rear heads or the ones near cabin are more prone maybe of the position and since the catalitic converter sits and makes some force on that head with all the exhaust weight. Im rebuilding them on 2007 Nox, also replacing front crank seal
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post #3 of 11 (permalink) Old 09-26-2019, 05:18 PM
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I'm not familiar with the V-6's used on the Equinox's, but I will say, "interesting" valve train geometry. Thanks for the pic.
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post #4 of 11 (permalink) Old 09-27-2019, 11:40 AM Thread Starter
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WTH? you have plastic intake plenum gaskets? i have tore down 4 motors and all had the steel felpro versions. my current motor has a lot of black oil film on the left/rear intake port in the head. like it was sucking in oil. i know the gaskets fail and you start sucking in coolant. missing coolant and no external leaks.
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post #5 of 11 (permalink) Old 09-27-2019, 08:20 PM
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Quote:
Originally Posted by garagerog View Post
I'm not familiar with the V-6's used on the Equinox's, but I will say, "interesting" valve train geometry. Thanks for the pic.
Just curious: what’s “interesting” about it. To me it looks very similar to my 3.4L Impala engine. Are you talking about the angle and placement of the rockers?

2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 131.6k miles [14-JUN-2019]

2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /222.5k miles [13-JUN-2019]
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post #6 of 11 (permalink) Old 09-28-2019, 03:16 PM
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Just curious: what’s “interesting” about it. To me it looks very similar to my 3.4L Impala engine. Are you talking about the angle and placement of the rockers?

Yes.
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post #7 of 11 (permalink) Old 09-28-2019, 03:33 PM
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I just had the head gaskets replaced on my 2005 equinox due to overheating issue. I had the heads checked and cleaned and they said there was not cracks or warping. The car seems to be running good. The temp gauge stays between the quarter and half mark while driving. However at idle it creeps up to the halfway mark. It hasn't went any further than that since the gaskets were replaced but it's only been a week. Just curious what is considered normal for this car.
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post #8 of 11 (permalink) Old 09-30-2019, 02:31 PM Thread Starter
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i would have to ask, what did the temp gauge do 6 months ago at idle, jacobiford? can you hear the cooling fans kicking on when it reaches 1/2 way? you can fiddle with the a/c too. turning on the a/c should turn on the fans.
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post #9 of 11 (permalink) Old 10-01-2019, 11:38 AM
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Interesting picture I think also. Canted valves, tall intake ports, (assume) roller lifters. Hot rod stuff there. And really clean in there.
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post #10 of 11 (permalink) Old 10-02-2019, 10:08 AM
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I had pushrods in but not to torque specs, i made the mistake of not confirming the torque, well broke a bolt on the pushrods in the head, Yikes, not good, got a extractor kit, use magnets, got duct tape all around the broken bolt, bought wireless drill, used a mix of ideas got to pull it out no harm done to heads. ordered new bolt from rockauto, meawile was considering to replace oil pan gasket, still thinking of doing it or not, have oil leak only at the front near front oil seal, wil replace front crankshaft seal, seems the engine has to be lifted to pull out the oil pan.
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