So my civic that I had in immaculate running order just developed this leak. I didn't know about it til after I bought it in late 05 and the previous owner had traded it in a couple months before that. I think he traded it in deliberately just before the 10 year extended warranty was up. My car was perfect at 171k when it developed the crack. I am actually going to try something I thought of. I'm going to pull the alternator, which is where it has atleast one leak, Hopefully it's the only leak but it looks like there may be more since there's coolant underneath and towards the back but could just be this leak(hopefully), and pressurize it with a coolant pressure kit. Then I'm going to see if it's only cracked at that spot behind the alternator which is where I know it's leaking from. Then I'm going to clean it up real good after draining the coolant and hit it with a layer of FlexSeal. This stuff seems to work good if you let it cure a bit. It's supposed to be good for both hot and cold temperatures. Then I'm going to let it sit for a bit and hit it with another layer and maybe even up to 4 layers after letting it sit for an hour or so afterwards. Then I'm going to let it cure for atleast 24 hours. Then I'm going to pressurize it again and see if it holds. The cooling system is usually only pressurized to about 15lbs or so so hopefully this will work. My goal isn't to find a permanent solution. I'm just curious if this can be a temporary fix. I am planning on having the block replaced. The service manual and what I've found has them pulling the engine from underneath. It does look like a tight fit for pulling from up top. Anyone ever pulled an engine on this and done it from the top ? If so, I will probably just pull it myself but my personal mechanic that I use for things I need a shop press or a lift for will do it for $1000. If this works I'm going to run it hard and see if it's holding up under high heat.
Re: 2006 honda civic lx sedan service bulletin 10-048
It's coming from behind the alternator. I actually haven't gotten around to trying to the temp fix. I think when I take in the car to have the engine replaced I'll just have em test it before they start work just to be sure. It'll save me the hassle of buying the tools to test it.
The problem is that they don't have a shipping option when I put the block in the cart. I actually live next to South Bay Honda, which is where Honda Parts Cheap is located so I'm going to be talking to them to see how to go about ordering it and possibly just doing a local pickup option.