Runs hot at idlle

[skiierjeff]

I removed both bellows from the top of the Y pipes and there are no shutters there. I think on an old engine like mine (1977) they are way down deep in the y pipe. I don't have my service manual yet so I can't be sure.


Jeff

 

[JVM225]

I removed both bellows from the top of the Y pipes and there are no shutters there. I think on an old engine like mine (1977) they are way down deep in the y pipe. I don't have my service manual yet so I can't be sure.


Jeff

You might be right about that. I found this with a Google search:

http://www.sterndrives.com/shutters.html

 

[Iprof]

"If you have an older engine you might have the old 3-piece exhaust y-pipe. To replace the shutters in the old 3-piece style t-pipe the engine will have to be removed."

This from the web site, have a look and see if you have the 3 piece "Y" piece.

Ken

 

[Rick K]

Finally able to get a pic... Here's the result of running my engine hot... Get 'er done and get 'er cooled down! I was SUPER lucky and even more amazed that the piston didn't score my block. Shop checked it all out, gave it a nice hone, and a clean bill of health. New pistons/rings and heads. Cracked both of those too. Waiting on my intake as I had it hot-tanked, etc. Should be able to test fire in a bit. No hurry, I have till next March! So far, I have $530 into her ($250 for remanned heads - yeah, I got a deal), plus my time.

 

[Iprof]

But you have still not told us what caused it to run hot. That had to get some hot to melt a piston and no other damage wow buy a lottery ticket.

Ken

 

[Rick K]

Ken, the "melt" part you see is actually where I cleaned that piston up with a 3M prep pad. It was pretty jagged and rough. This thing is going on my desk as a constant "reminder" to keep my eye on the gauges!!

The reason why this happened hasn't been pin pointed. I rambled on about what I thought the reasons were in another post. I did have to replace my impeller, BUT, my temp gauge never showed a hot condition, just higher than what I considered to be a normal reading on that gauge. Along with that I replaced the gauge, and thermostat.

Everything was back to normal, and about 2 weeks later, I dropped the #6 cylinder, and that was that. My timing chain did have a lot of slop in it, and my advance on my distributor was sticky. Head gasket was ratty between cyls 3 & 5, and I was leaking a bit of water into cyl 3.

I honestly think that it was a combination of things that caused its downfall. Not to mention I ran the engine pretty hard. Relentlessly in fact. Never exceeded 4200RPM though.

So that's about it. I'll test fire it in about a week then store it till spring. Watch now, as I attempt to get this engine down in my basement... :grin: