Uh oh, what's this hole???

[robbyr1]

I'm replacing my 2000 Volvo Penta 3.0 GSM-A (cracked block due to overheating). I took the "combination manifold" off today and found this:

Why is there a hole on one side of the bottom of the manifold? Is this something else that happened during the overheat?
Thanks in advance.
Rob

 

[Don S]

Re: Uh oh, what's this hole???

Cracked blocks normally crack from freeze damage, and freezing also pops out core plugs and cracks manifolds.

Did you winterize the boat for winter?

 

[robbyr1]

Re: Uh oh, what's this hole???

Don,

Thanks for the response. The boat was (I thought) winterized as best I could 18 months ago and has been sitting since. Unfortunately, I could not afford to replace the motor last summer so it has sat since the previous winter. Based on my previous luck with this boat, I am assuming that the manifold is toast and I will be shelling out another $500 that I don't have. Anyways, do you have any suggestions on how to test the manifold? Thanks for all the help, I appreciate it. Rob

 

[Nickypoo]

Re: Uh oh, what's this hole???

If the manifold isn't cracked you can probably just replace the freeze plug and reuse that manifold.

 

[jerryjerry05]

Re: Uh oh, what's this hole???

It seems your luck might have changed!! Usually the manifold cracks and it's useless.
Try putting the plug back in,use a good sealer,then test it for leaks into the exhaust passages/