|Topic Review (Newest First)|
|08-30-2011 06:28 PM|
A head gasket is not such a big job if you can get access.
The fact shes running well before she blows the water fill tank is a good sign, may be you will be lucky. Go with the advice and get the head skimmed. Check if the Yanmar supply thicker gaskets to allow for the skim.
|08-29-2011 11:34 PM|
|fryewe||I've seen this before. Pressure in the cooling system means exhaust gases in the water jacket = blown head gasket if you are lucky; warped head or cracked head if you are not. Sorry, Tom. Good luck.|
|08-29-2011 09:01 PM|
Originally Posted by tomperanteau View Post
|08-29-2011 06:57 PM|
|tomperanteau||I'm thinking you guys are right. The engine is in a really tight place in my old Columbia. Plenty of room around it, just no access to the top unless it is pulled out. Guess it's time to break out the tools.|
|08-29-2011 06:45 PM|
Originally Posted by JimsCAL View Post
If so, valve clearances should be re-set, even if you just replace the gasket with no head work being done. Not likely the block deck is warped but it can be checked with a good sharp straight edge, at least for starters. A dial indicator, if there is a solid surface to mount it on? might show any variences?
Not sure exactely how to mount it, maybe someone with machine shop experience could advise?
|08-29-2011 05:24 PM|
|smurphny||Hope you didn't add cold water when the engine was shut off and hot. This can cause the casting to crack. Got my fingers crossed you don't have compression entering from cylinders.|
|08-29-2011 04:45 PM|
|JimsCAL||I agree with dabnis. Sounds like a head gasket. Hopefully the head isn't warped.|
|08-29-2011 04:29 PM|
|tomperanteau||Geez, I hope not! She is running really smoothly for the short duration that I have run her. Doesn't seem to be any mismatch in the cylinders, but then it is difficult if it is a small blow out.|
|08-29-2011 03:45 PM|
Sounds like a blown head gasket with the combustion gases blowing into the water jacket?
|08-29-2011 11:09 AM|
Recently while motoring we had a belt break on the engine. I didn't realize that it had broken for a minute or two, and the engine had overheated. I shut her down and replaced the best. She started right up and sounded great. I thought I had made it through a potential catastrophe.
Now it seems that, after filling her with water to test her, the engine almost immediately blows the top off the overflow tank. I can run it from cold, for about 10 seconds, and pressure builds up in the overflow and the top pops off. The overflow will slowly fill and I have to shut it down. I noticed that if I have the radiator cap off, water fill spray out of the opening when I crank the engine.
Anyone seen this before? The engine is practically new with around 180 hours on it. Could it be that the water in the engine is almost immediately boiling and building too much pressure?