Volvo Penta 4.3 GL Temp Sensor Question

[Striperr]

Hello everyone,
So I just finished up the headache of swapping a used 4.3 long block to my boat and swapping everything over (due to a cracked block on old engine). I started her right up and she purrs like a kitten, however I have one last issue on my hands. On the 4.3 the temperature sensor sits in the intake manifold by the #2 cyclinder. My problem here is that the intake manifold on my new engine has a plug in it that has part of the head cracked off so I can't get this out for the life of me (see attached pic). I am curious if any of you gurus have any tricks up your sleeves to back the plug out, or alternatively if I can just change the location of the temp sensor to maybe the exhaust riser? I would hate to have to pull the intake manifold off after everything just to drill the plug out, but if need be that's what I will do. Any thoughts would be greatly appreciated, thanks!

 

[Scott Danforth]

three suggestions

use the manifold from your old motor.

or start drilling

or remove the manifold, fire up the torch, get the intake hot, alow to cool, then plug-weld a nut onto the plug to allow you to back it out. the repeated heating/cooling will fracture the corrosion.

 

[Bondo]

Ayuh,.... Unless there's another plug on the other side of the manifolds water passage, or a plug in the t-stat housin', Below the t-stat,.....

Ya either gotta drill that one out, or use yer other intake,....

The temp sender has to be on the block's side of the t-stat to give ya any useful temps,....

In the exhaust system, anywhere is a waste of time, no useful info,....