I have a 94 Accord 2.2 VTECH 5-speed. 268k Miles. Clutch started slipping about 3k miles ago. Took it to the dealer because they are reasonable and treat me well so at a minimum I get an estimate from them. They found low compressiin in one cylinder and really low compression in another. Rear main seal was leaking which was attributed to age and possible crankcase pressure from blow by. I let it set for 9 months because I'm busy but now I want it out of my driveway. Before I part it out I decided to try a piston soak to attempt to recover compression.
I started by using two bottles of B12 over a period of 24+ hours. After that leaked into the crankcase I cranked the motor for a few seconds and then put 4oz of MMO in each cylinder, and let it sit for 24 hours. Then I used my mytivac to suck the MMO out and inspect it. It was suprisingly clean. So I rotated the motor and put MMO back in for another 24. Sucked it out, this time it was dirtier but not black. I poured it in the oil fill. Filled up the oil with Mobil1 10w40. (Which is what I had been using for at least 100k miles due to small oil leaks and high mileage. It was the cheap stuff from WM) Took a while to get her started, had to jump it. She finally started and let it run for 1 hour.
I found leaks I didn't know I had. Plus the oil is thin from the B12 and it floats on ice so it looked worse than it was. I will refill the oil and start it again before I do another compression test. If she passes compression I will fix the oil leaks and throw a new clutch in. If not, she gets chopped. I will let you know how compression test goes.
By the way. I do not reccomend this method to anyone. I only did it because the engine had both feet in the grave already.
I started by using two bottles of B12 over a period of 24+ hours. After that leaked into the crankcase I cranked the motor for a few seconds and then put 4oz of MMO in each cylinder, and let it sit for 24 hours. Then I used my mytivac to suck the MMO out and inspect it. It was suprisingly clean. So I rotated the motor and put MMO back in for another 24. Sucked it out, this time it was dirtier but not black. I poured it in the oil fill. Filled up the oil with Mobil1 10w40. (Which is what I had been using for at least 100k miles due to small oil leaks and high mileage. It was the cheap stuff from WM) Took a while to get her started, had to jump it. She finally started and let it run for 1 hour.
I found leaks I didn't know I had. Plus the oil is thin from the B12 and it floats on ice so it looked worse than it was. I will refill the oil and start it again before I do another compression test. If she passes compression I will fix the oil leaks and throw a new clutch in. If not, she gets chopped. I will let you know how compression test goes.
By the way. I do not reccomend this method to anyone. I only did it because the engine had both feet in the grave already.