'78 Ericson27 Atomic 4 Universal Overheating

[chrisoelder]

Now THAT'S a good water flow.

Haha yes, it is! After cleaning her out and starting her up I said "Ohhh that's how its suppose to flow" haha

[ndutton]

. . . . . . I should've done that first and this would have concluded a lot faster

My point exactly but I was trying to be polite.

[chrisoelder]

My point exactly but I was trying to be polite.

No worries! No harm no foul

[JOHN COOKSON]

Chris
Now it is time for step 2.
If it will work in your engine space, get rid of the 90 degree barbs and go to straight barbs on the manifold inlet and outlet. 90 degree barbs are famous for plugging up with crud.
I've been around this mulberry bush with the 90 degree barbs. After I went to straight barbs the problem disappeared.
You really need to totally flush the manifold. Attach the hose to the manifold inlet right to the faucet. Attach a hose to the outlet and turn the faucet on full blast. I think the directions were posted earlier in this thread.

TRUE GRIT

Edit: See post #17

[chrisoelder]

Chris
Now it is time for step 2.
If it will work in your engine space, get rid of the 90 degree barbs and go to straight barbs on the manifold inlet and outlet. 90 degree barbs are famous for plugging up with crud.
I've been around this mulberry bush with the 90 degree barbs. After I went to straight barbs the problem disappeared.
You really need to totally flush the manifold. Attach the hose to the manifold inlet right to the faucet. Attach a hose to the outlet and turn the faucet on full blast.

That is a great idea. I did do a flush after I cleaned out the manifold but I have a feeling my anxiety will cause me to do it bi-monthly. I am going to remove those elbow barbs on the manifold, I just don't want to deal with it again.

Good news! Just got back from our sunset sail and the engine ran amazing. She did great with higher speed, rougher conditions, and even under sail with a good heel.

Very pleased with my A4. Thank you again, everyone!

[JOHN COOKSON]

While you are at it it would be a good idea to re plumb the manifold for the thatch modification. The thatch modification is where cooling water is introduced into manifold at it's low end and comes out of the manifold at the high end. This eliminates air pockets and results in more even and through manifold cooling. Search the forum by "thatch modification" to read all about it. There have been many posts on the subject.
Glad to hear you got the over heating problem solved.

TRUE GRIT

[tenders]

So did that gunk end up being engine rust/scale...or mud? It looks like silt to me. That would explain why the acid didn’t budge it.

[alcodiesel]

cooling water flows again

I love it when a plan comes together.

[Administrator]

I love it when a plan comes together.

+1!

Bill

[chrisoelder]

So did that gunk end up being engine rust/scale...or mud? It looks like silt to me. That would explain why the acid didn’t budge it.

It was a weird mixture of mud like gunk with rust/scale in with it

[CajunSpike]

My situation was pretty much exact same as that. Black mud looking clog with rust scales.

[JOHN COOKSON]

It was a weird mixture of mud like gunk with rust/scale in with it

It would be a good ideate take the side plate off to see how much "mud" is in the engine cooling jacket.

TRUE GRIT