I have a 86 honda with close to 300000 miles on it I have had it?

Question

since it was new. I replaced the thermostate about a week ago and I just saw a green spot under the car I looked a around the themostate housing and it was dry. I jacked the car up and on the back of the oil pan I saw anti freeze but I couldn't see where it was coming from and there is nothing back there that would leak. What could be the problem

Answer 1

It could be alot of things. Don't listen to what the first two said because they can't use thier ESP powers and diagnose your problem without looking at your vehicle. If I was in your situation I would take it to a shop and have your cooling system pressure tested. What they do is attatch a pump to your radiator cap/and or overflow tank and pressurize the system. Whatever leaks you may have the antifreeze will start pissing out of. I mean it could be one of your heater core lines, freeze plug, water pump (alot of Honda's water pumps are driven off the timing chain and are a place where you can't see them without taking off the timing chain cover), intake manifold, etc. you get the idea. So if you can't visually see where it's leaking from and repair it yourself then take it to a reasonably priced shop who does good work. Hope this advice helped you out.

Answer 2

Probably a freeze plug that is leaking. It also could be a leak in the heater hose. The usual life span of a vehicle would be 10 years. At 300,000 miles and 21 years of running, you have probably reached the point where you should think about retiring it. If you do want to keep it it will probably start having a series of problems now. You might want to discuss options with your mechanic.

Answer 3

well i sortove had the same problem with my 69nova ss with over 500000miles i could not find out the problem on my own so i went the shop and had them look at it and they said that it was the gass tank it may not look like nothing is leaking but there is. other wise there would not be antifreeze all the way back there