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Cooling Systems -- Problems & Solutions (Radiator, Fan, etc)

561 messages,  Last post on Nov 12, 2009 at 1:37 PM

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What is this discussion about? Engine

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#555 of 561 Re: Camaro Problem [trail03] by Mr_Shiftright HOST Nov 10, 2009 (5:11 pm)
Replying to: trail03 (Nov 10, 2009 1:31 pm) Well remove a spark plug then, with the cooling system still under pressure, and maybe get one of those light scopes in the cylinders as well. If you had a cracked head, you'd probably overheat like crazy or have water in the oil for sure.   What's your compression readings straight across on both sides? Replies to this message: trail03 (Nov 11, 2009 2:07 am) kiawah (Nov 11, 2009 5:42 am) Mr_Shiftright (Nov 11, 2009 7:22 am)
#556 of 561 Re: Camaro Problem [Mr_Shiftright] by trail03 Nov 11, 2009 (2:07 am)
Replying to: Mr_Shiftright (Nov 10, 2009 5:11 pm) What's your compression readings straight across on both sides? What does this mean I am not a machanic. Replies to this message: kiawah (Nov 11, 2009 5:42 am) Mr_Shiftright (Nov 11, 2009 7:22 am)
#557 of 561 Re: Camaro Problem [trail03] by kiawah Nov 11, 2009 (5:42 am)
Replying to: trail03 (Nov 11, 2009 2:07 am) When an engine is working correctly, the intake and outake valves will close, and the piston will move up compressing the fuel mixture, so that the sparkplug will then ignite it. There is a gauge, that fits in the sparkplug hole, which measures the pressure in the cylinder.   If a valve is bad and not sealing, or the rings on the piston are bad, or the head gasket is leaking, then the cylinder pressure will be lower than it is supposed to be. Replies to this message: Mr_Shiftright (Nov 11, 2009 7:22 am)
#558 of 561 Re: Camaro Problem [kiawah] by Mr_Shiftright HOST Nov 11, 2009 (7:22 am)
Replying to: kiawah (Nov 11, 2009 5:42 am) Correct. I used the term "straight across", which was in retrospect not the best term to use---but what i was driving at is that sometimes you can spot a bad head gasket (sometimes!) doing a compression test, especially if you notice two ADJACENT cylinders having lower compression than all the rest.   So, if your left cylinder bank, for instance, reads 150, 155, 145, 150, that's healthy. But if the right bank reads 150 90 90 150, then you almost certainly have a break in the head gasket between those two cylinders.   The reason I say "sometimes" is because head gaskets can break or deform in different places on the head. The break or defect doesn't ALWAYS lead to low compression, or to water in the oil. Sometimes you can get exhaust gases in the coolant, for instance.   In that latter case, you can chemically test your coolant for the presence of combustion gases.   Tracking down a head gasket leak is a science. Taking off the heads to see if there is a leak is like sawing off the top of your head to see if there's a tumor. There are more preliminary methods.
#559 of 561 rebuilt engine by trail03 Nov 12, 2009 (12:41 pm)
CAN ANY TELL ME WERE I CAN GET A REBUILT ENGINE IN THE HOUSTON TX. AREA FOR A 99 CHEVY CAMARO 3.8 LITER ENGINE Replies to this message: kiawah (Nov 12, 2009 1:16 pm) trail03 (Nov 12, 2009 1:37 pm)
#560 of 561 Re: rebuilt engine [trail03] by kiawah Nov 12, 2009 (1:16 pm)
Replying to: trail03 (Nov 12, 2009 12:41 pm) I'd start with the yellow pages, and then internet searches. Replies to this message: trail03 (Nov 12, 2009 1:37 pm)
#561 of 561 Re: rebuilt engine [kiawah] by trail03 Nov 12, 2009 (1:37 pm)
Replying to: kiawah (Nov 12, 2009 1:16 pm) I NEED SOMEONE WHO HAS HAD A LONG BLOCK ENGINE PUT IN A CAR OF THERE OWN I HAVE LOOKED IN THE YELLOW PAGES BUT I NEED A GOOD MACHANIC NOT A THIEF.

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