My friend blew a head gasket on the dyno yesterday in his 93 mustang. The oil now looks like a milk shake. Very BAD!!! I wanted to flush the motor with clean oil and replace the gasket. Have others had sucess doing this or did you have to rebuild? Any tips on flushing this thing out would be great. Thanks.
SVT Tech
Changing just the head gasket is fine provided you do some checks first. You will need to make sure the deck on the head is straight. If it is more than .004" warp. I would have a valve job and decking done on the heads.
You also need to figure out why it happened. Gaskets don't blow for no reason.
Once you have fixed the engine. Drain the oil and put new in. Run the car for 15-20 minutes, drain the oil and add new. After that you should be fine.
You also need to figure out why it happened. Gaskets don't blow for no reason.
Once you have fixed the engine. Drain the oil and put new in. Run the car for 15-20 minutes, drain the oil and add new. After that you should be fine.
NB
Was the car hooked up to a Wide Band O2 for the test? If so I would look carefully at the data.
Having had this problem more than a couple of times I can tell you that it is almost always the tune up on the motor that is at fault. If you are running at all lean due to an undersized fuel pump or injectors, or a badly calibrated MAF sensor you will be very likely to push a gasket out. Lean AF ratios have been the common cause of my head gasket issues but obviously excessive timing can also wreak havoc. Timing is nomrally easier to keep tabs on so is not so often a problem.
I have a had good success with the method that Gordon describes above when replacing gaskets. Make sure you identify the problem that caused the blown gasket before leaning on the motor again.
Was the car hooked up to a Wide Band O2 for the test? If so I would look carefully at the data.
Having had this problem more than a couple of times I can tell you that it is almost always the tune up on the motor that is at fault. If you are running at all lean due to an undersized fuel pump or injectors, or a badly calibrated MAF sensor you will be very likely to push a gasket out. Lean AF ratios have been the common cause of my head gasket issues but obviously excessive timing can also wreak havoc. Timing is nomrally easier to keep tabs on so is not so often a problem.
I have a had good success with the method that Gordon describes above when replacing gaskets. Make sure you identify the problem that caused the blown gasket before leaning on the motor again.
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