needs help
01-29-05, 12:14 AM
#1
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needs help
how can you tell if the motor got water gasket broken?please let me know if anyone did run into this problem before
thanks
thanks
Last edited by sonnguyenrx7; 01-29-05 at 12:18 AM.
01-29-05, 09:22 AM
#3
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01-29-05, 10:46 AM
#4
The link mentioned in the other thread is:
http://www.scuderiaciriani.com/rx7/o-ring_failure.html
First thing, the water 'gasket' that common fails is the o-rings that separate coolant from leaking into the engine combustion chamber. Failure is indicated by exhaust in the coolant, or vice-versa. Since they are buried inside the engine, you can't directly inspect them until you've committed to rebuilding the engine. And the solution is rebuilding the engine.
I could not find the champagne bubble test information. Here is my understanding of the test procedure:
- start with a cold engine
- remove the cap on the water pump neck
- wrap paper towels around the neck, or put a cut-off 2 liter bottle upside-down in the neck and tape it tight.
- start the engine. At first the thermostat will be closed, but after it warms up (takes a good 5 min at idle speed) you should see the coolant start to flow when the thermostat opens. Now you watch for any small bubbles coming out of the thermostat (engine coolant passages). If you see a small stream of bubbles, it's likely that they are exhaust gas blowing by the coolant seal leak and into the coolant.
At that point I would save a few grand for the rebuild and take it directly to a rotary engine specialist. And start practicing how to search. This whole thing has been covered a hundred times before and there is more than enough information for you.
http://www.scuderiaciriani.com/rx7/o-ring_failure.html
First thing, the water 'gasket' that common fails is the o-rings that separate coolant from leaking into the engine combustion chamber. Failure is indicated by exhaust in the coolant, or vice-versa. Since they are buried inside the engine, you can't directly inspect them until you've committed to rebuilding the engine. And the solution is rebuilding the engine.
I could not find the champagne bubble test information. Here is my understanding of the test procedure:
- start with a cold engine
- remove the cap on the water pump neck
- wrap paper towels around the neck, or put a cut-off 2 liter bottle upside-down in the neck and tape it tight.
- start the engine. At first the thermostat will be closed, but after it warms up (takes a good 5 min at idle speed) you should see the coolant start to flow when the thermostat opens. Now you watch for any small bubbles coming out of the thermostat (engine coolant passages). If you see a small stream of bubbles, it's likely that they are exhaust gas blowing by the coolant seal leak and into the coolant.
At that point I would save a few grand for the rebuild and take it directly to a rotary engine specialist. And start practicing how to search. This whole thing has been covered a hundred times before and there is more than enough information for you.
Last edited by dgeesaman; 01-29-05 at 10:48 AM.