Tweeted twitter.com/StackMechanics/status/971241632396906497
3 formatting to break up the wall of text
source | link

Evauating Evaluating a Head Gasket Replacement

Car: 1991 Volvo 240

History: There

There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I

I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After

After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. II did, however, do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. II believe the engine is running a little rich. I

I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V56 V. I

I can test with an oscilloscope, but assume it is okOK. There

There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. II should emphasize that the amount of smoke is very small. I

I think most people would not notice it, but I do because I am looking for it. I

I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should

Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

EDIT: A video of the smoke/fluid from the tailpipe is available here.. A video of the vacuum at the intake is shown here.

Evauating a Head Gasket Replacement

Car: 1991 Volvo 240

History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich. I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V. I can test with an oscilloscope, but assume it is ok. There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small. I think most people would not notice it, but I do because I am looking for it. I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

EDIT: A video of the smoke/fluid from the tailpipe is available here.. A video of the vacuum at the intake is shown here.

Evaluating a Head Gasket Replacement

Car: 1991 Volvo 240

History:

There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status:

I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly.

After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however, do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich.

I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56 V.

I can test with an oscilloscope, but assume it is OK.

There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small.

I think most people would not notice it, but I do because I am looking for it.

I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps:

Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

EDIT: A video of the smoke/fluid from the tailpipe is available here.. A video of the vacuum at the intake is shown here.

    Bumped by Community user
    Bumped by Community user
2 added 211 characters in body
source | link

Car: 1991 Volvo 240

History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich. I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V. I can test with an oscilloscope, but assume it is ok. There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small. I think most people would not notice it, but I do because I am looking for it. I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

EDIT: A video of the smoke/fluid from the tailpipe is available here.. A video of the vacuum at the intake is shown here.

Car: 1991 Volvo 240

History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich. I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V. I can test with an oscilloscope, but assume it is ok. There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small. I think most people would not notice it, but I do because I am looking for it. I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

Car: 1991 Volvo 240

History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich. I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V. I can test with an oscilloscope, but assume it is ok. There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small. I think most people would not notice it, but I do because I am looking for it. I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?

EDIT: A video of the smoke/fluid from the tailpipe is available here.. A video of the vacuum at the intake is shown here.

1
source | link

Evauating a Head Gasket Replacement

Car: 1991 Volvo 240

History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently replaced the head gasket.

Current status: I worry a LOT and am not confident in my work. I am not sure that I got the head gasket on correctly. After replacing the head gasket I did a leak down test and did not hear bubbles in the radiator. I did, however do a vacuum test at the intake and see a sharp drop in vacuum when I rev the engine. I believe the engine is running a little rich. I don't notice any "sweet" smell associated with a leaking/blown head gasket. I tested the O2 sensor with a DMM and the voltage is 0.56V. I can test with an oscilloscope, but assume it is ok. There is sometimes a very small amount of white smoke and water when the car is first started, but then goes away. I should emphasize that the amount of smoke is very small. I think most people would not notice it, but I do because I am looking for it. I have not noticed any oil in the coolant expansion tank, coolant in the oil, or coolant in the transmission fluid.

Next Steps: Should I get a kit to test for combustion gasses in the expansion tank? Would this give me any additional information that a leak down test would not? Are there any other tests that I can do to make sure I installed the head gasket correctly?