Tested my 03 3.5 max out and I was in the 140 psi range around where the book says is the minimum .I have 16th on her what r u guys running for compression?
Oops meant to say I have 160,000 miles |
Standard:
1,275 kPa (13.0 kg/cm2, 185 psi)/300 rpm Minimum: 981 kPa (10.0 kg/cm2, 142 psi)/300 rpm Difference between each cylinder: 98 kPa (1.0 kg/cm2, 14 psi)/300 rpm NG (NO GOOD) => Check pistons, piston rings, valves, valve seats and cylinder head gaskets. http://www.nicoclub.com/FSM/Maxima/2002/EC.pdf Engine replacement time since engine rebuild's so $$$$$$$ |
If the tester is accurate - precats are awesome!
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fouled plug
So today Check engine started flashing.and was misfiring real bad barely got home. Cylinder 2 . Unplugged coil stayed the same. Swapped coil from a known good cylinder stayed the same. Did a compression test 142 psi with a crappy harbor freight gauge. Pulled the plug it was soaked.hit it with a propane torch put it back in and it runs fine now. It's been a year since I put new oem plugs in.any idea as to what's goin on with this max?
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Sounds like engine is toast
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Originally Posted by heavychevy
(Post 9033886)
So today Check engine started flashing.and was misfiring real bad barely got home. Cylinder 2 . Unplugged coil stayed the same. Swapped coil from a known good cylinder stayed the same. Did a compression test 142 psi with a crappy harbor freight gauge. Pulled the plug it was soaked.hit it with a propane torch put it back in and it runs fine now. It's been a year since I put new oem plugs in.any idea as to what's goin on with this max?
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coolant
Car also seems to turn coolant dirty. Gets oily residue in the overflow tank. Also heat won't work at idle only when slightly revved and I bled the system really well. There is no coolant in oil and it uses some oil. Anyone point me in the right direction. Don't wanna.pull motor if this one can be salvaged
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Low compression,oil on plugs,misfire,coolant mixing up oil,early signs of a headgasket,yeah that motor is waving bye-bye,sooner or later you keep driving it the car will smoke and you will end up with a multiple misfire p300 code. The plug was soaked with oil right?
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coolant
Yes pulled plug was soaked hit it with a torch and misfire went away. Is it worth doin head gasket. Also why would head gasket go didn't know these motors had this problem
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Originally Posted by heavychevy
(Post 9037373)
Yes pulled plug was soaked hit it with a torch and misfire went away. Is it worth doin head gasket. Also why would head gasket go didn't know these motors had this problem
Did you abuse it,low on oil? ran it hot? The hg jobs might be too involved and expensive...if i was you i would just slap the car with a 07altima 3.5 engine. Or just replace it with another lower mileage vq.:nod: |
It runs shifty lately and check engine light flashes seems better when it warms up fully. Also I raced my friends rx8 and still beat him. So it seems like just fix in this misfire will let me run it another year at least.
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Originally Posted by heavychevy
(Post 9036944)
Car also seems to turn coolant dirty. Gets oily residue in the overflow tank. Also heat won't work at idle only when slightly revved and I bled the system really well. There is no coolant in oil and it uses some oil. Anyone point me in the right direction. Don't wanna.pull motor if this one can be salvaged
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Originally Posted by vqmaxman
(Post 9037504)
Ok, to confirm a headgasket check your dipstick check for the oil to look dirty milk chocolate color and it should stink the coolant mixing in and another sign your car drinks coolant and blows white smoke out the tailpipe. If you noticed a cracked head gasket can also cause the car to misfire,mixing in with combustion. The question is the car mixing at the dipstick and blowing white smoke?
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leaks
No coolant in the oil dipstick. White smoke maybe slight when cold but not heavy.are these water pumps common to go bad. Maybe that would explain why I have no heat at idle?
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May just say screw this motor.found a 2007 maxima 3.5 engine with 65k on it for $230. Been reading these are the most desirable engines to swap in.guess the piston ring issues r now resolved. Is the 6.5 gen 2007-2008? Can the precat be used from this year or do they still break down like my 5.5 gen?
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Originally Posted by heavychevy
(Post 9038949)
May just say screw this motor.found a 2007 maxima 3.5 engine with 65k on it for $230. Been reading these are the most desirable engines to swap in.guess the piston ring issues r now resolved. Is the 6.5 gen 2007-2008? Can the precat be used from this year or do they still break down like my 5.5 gen?
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Originally Posted by heavychevy
(Post 9038948)
No coolant in the oil dipstick. White smoke maybe slight when cold but not heavy.are these water pumps common to go bad. Maybe that would explain why I have no heat at idle?
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Thought it was air trapped too but I bought the coolant bleed funnel thing jacked the front a the car up and ran it forever still have my problem may even bad water pump?
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