I a few questions for Dhadley or any of the other experts who care to answer. I asked for Dhadley because he has helped me a couple of times in the past and I really trust his opinions.
Anyway I posted a couple of weeks ago about a 98 115 crossflow v4 that sat for 9 months and when I tried to start it she was seized up. The engine was in good shape the last time I used it and by some stroke of luck I just happened to do a compression check before I put it up and all cylinders were within 5 psi and around 118 psi. I had noticed the last couple of times I used it a little rust on the tip of the lower left spark plug which concerned me a little but not too much. So when I tried to turn it over after 9 months of sitting and it was frozen up tight I suspected the rings had rusted. On the advice of several helpful people here at iboats I filled the cylinders with first PB Blaster, then Marvel Miracle Oil and finally CorrosionX for a total of about a week of soaking. She still wouldn't budge. I pulled the heads and there was a little surface rust on the lower 2 cylinders but not so much as to concern me, the slight amount of rust easily wiped off with an oily rag and the bore is smooth.
At this point I decided to remove the powerhead for further inspection and possibly a rebuild. By the way Dhadley you were right, the problem I had with lifting the powerhead off was the 2 studs at the rear of the powerhead were rusted and a few hard shakes of the powerhead broke them loose. Anyway once I got the powerhead on a bench I removed one of the inspection ports and looked into the port and although visibility is limited I saw no rust. This was good because I had expected salt water had somehow got into the crankcase and rusted things up, apparently not. Next I removed the outer and inner exhaust covers and although they were dirty inside (not all that dirty though) I found no signs of rust. once the crud was cleaned up the 2 cylinders I could see through the exhaust ports looked rust free. The rings even appear to be shiny. Of course this is after a week of soaking and another week or two of spraying them down every day with penetrating oil.
This brings me to my first question. I would like to open this thing up and find out why she is seized up but I know once I break the seal on the crankcase halves it means all new seals, gaskets and probably bearings and rings. I would like to try to free this thing up one more time before I get into that much work. When I was trying to turn the flywheel before I was applying about 180 lbs of torque to the torque wrench. I did not go beyond this because I didn't want to break anything. At this point since my next step is tearing this engine apart I am not so afraid of breaking anything. My question is should I put a good long breakerbar on the flywheel nut and really bear down on it or should 180 lbs have been enough to break it loose? I did put an impact wrench on it but that was almost useless. I will say I can tap on one of the pistons with a hammer and it bounces around just a little, the other three show no movement at all.
I have another question or two but I thought I would take them one at a time. Thanks.
Anyway I posted a couple of weeks ago about a 98 115 crossflow v4 that sat for 9 months and when I tried to start it she was seized up. The engine was in good shape the last time I used it and by some stroke of luck I just happened to do a compression check before I put it up and all cylinders were within 5 psi and around 118 psi. I had noticed the last couple of times I used it a little rust on the tip of the lower left spark plug which concerned me a little but not too much. So when I tried to turn it over after 9 months of sitting and it was frozen up tight I suspected the rings had rusted. On the advice of several helpful people here at iboats I filled the cylinders with first PB Blaster, then Marvel Miracle Oil and finally CorrosionX for a total of about a week of soaking. She still wouldn't budge. I pulled the heads and there was a little surface rust on the lower 2 cylinders but not so much as to concern me, the slight amount of rust easily wiped off with an oily rag and the bore is smooth.
At this point I decided to remove the powerhead for further inspection and possibly a rebuild. By the way Dhadley you were right, the problem I had with lifting the powerhead off was the 2 studs at the rear of the powerhead were rusted and a few hard shakes of the powerhead broke them loose. Anyway once I got the powerhead on a bench I removed one of the inspection ports and looked into the port and although visibility is limited I saw no rust. This was good because I had expected salt water had somehow got into the crankcase and rusted things up, apparently not. Next I removed the outer and inner exhaust covers and although they were dirty inside (not all that dirty though) I found no signs of rust. once the crud was cleaned up the 2 cylinders I could see through the exhaust ports looked rust free. The rings even appear to be shiny. Of course this is after a week of soaking and another week or two of spraying them down every day with penetrating oil.
This brings me to my first question. I would like to open this thing up and find out why she is seized up but I know once I break the seal on the crankcase halves it means all new seals, gaskets and probably bearings and rings. I would like to try to free this thing up one more time before I get into that much work. When I was trying to turn the flywheel before I was applying about 180 lbs of torque to the torque wrench. I did not go beyond this because I didn't want to break anything. At this point since my next step is tearing this engine apart I am not so afraid of breaking anything. My question is should I put a good long breakerbar on the flywheel nut and really bear down on it or should 180 lbs have been enough to break it loose? I did put an impact wrench on it but that was almost useless. I will say I can tap on one of the pistons with a hammer and it bounces around just a little, the other three show no movement at all.
I have another question or two but I thought I would take them one at a time. Thanks.
