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Help 10 g37 coolant loss 77k

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Old 03-17-2019, 02:08 PM
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PNW_IPL
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10 g37 coolant loss 77k

Loosing coolant. Alot. Went to bed with resevoir full. Woke up to it completely empty and radiator slight loss. Pulled the plastic cover. Coated with fluid. Started looking for leaks and found a possible leak above the oil pan. How is this possible if the water pump is internal? Looks like the gasket make may be a culprit?








Old 03-17-2019, 02:31 PM
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PNW_IPL
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all hoses checkout. Radiator checks out. Overflow tank checks out and trans coolant lines checkout. Its coming from the block im sure but does that mean waterpump or something else?
Old 03-17-2019, 04:04 PM
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slartibartfast
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A pressure test can help. You should see bubbles or stronger leak if it's external at the point of the leak. Or, have someone stand behind your car after it's warm to check for a sweet smell from the exhaust which would indicate a head gasket problem.

I suspect an external leak since it drained away during the night.
Old 03-17-2019, 04:06 PM
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http://youtu.be/cFErMEW3bU4
Old 03-17-2019, 04:08 PM
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Old 03-18-2019, 09:43 AM
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OnlyNissan
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Originally Posted by slartibartfast
A pressure test can help. You should see bubbles or stronger leak if it's external at the point of the leak. Or, have someone stand behind your car after it's warm to check for a sweet smell from the exhaust which would indicate a head gasket problem.

I suspect an external leak since it drained away during the night.
I agree a pressure test is definitely warranted here.
Old 03-18-2019, 09:48 AM
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Thanks guys. Having it towed to Nissan.
Old 03-18-2019, 12:32 PM
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teahead
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If it's a water pump, which is the next worst thing to a head gasket, then good time to do a galley gasket redo.
Old 03-18-2019, 12:33 PM
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Originally Posted by teahead
If it's a water pump, which is the next worst thing to a head gasket, then good time to do a galley gasket redo.
no doubt.
Infiniti quoted 2995 for pump t stat and galley gaskets without the whole rear timing cover. Waiting for Nissan's reply on a quote.

infiniti quoted 2650 for just waterpump and T stat.
Old 03-18-2019, 02:08 PM
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teahead
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Your signature should show what year, what model of G37 you have.

So are you saying, your coolant flows out without the car running???
Old 03-18-2019, 02:13 PM
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PNW_IPL
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Originally Posted by teahead
Your signature should show what year, what model of G37 you have.

So are you saying, your coolant flows out without the car running???
i have 3
13 ipl
10 coupe rwd
08 sedan rwd.

coolant will spill out after shutting off then slowly stops
Old 03-18-2019, 05:24 PM
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teahead
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Oil look good? Not milky at all, right?

Hope not.
Old 03-18-2019, 05:51 PM
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Originally Posted by teahead
Oil look good? Not milky at all, right?

Hope not.
oil looks normal.
cap is clean
Old 03-18-2019, 08:32 PM
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Originally Posted by PNW_IPL
coolant will spill out after shutting off then slowly stops
Spill out from where? That possible water pump gasket leak? That symptom sounds like suspiciously like a head gasket leak.
Old 03-18-2019, 08:33 PM
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Originally Posted by slartibartfast
Spill out from where? That possible water pump gasket leak? That symptom sounds like suspiciously like a head gasket leak.
weep hole


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