How to remove plugs from manifold?

Trekka · 25-11-2008, 01:52

Below is a picture of the exhaust manifold on my 4-108. Coolant runs through it. I would like to remove the two half inch bronze plugs, on the side and top rear, as well as the large plug, top forward, which has a return on it.

I have been straining and straining to get these to move. I used PB Blaster a few days ago and again tonight. They don't budge even with me hammering on the wrench.

Suggestions?

I would like access to the inside for cleaning, and the manual says that if the coolant system needs to be bled to prevent air pockets, to loosen the top two plugs when filling.

This forum has been great on advising me in this refurb. Any suggestions welcomed.

25-11-2008, 01:52	#1
Trekka Registered User Join Date: Sep 2006 Location: Chesapeake Bay Boat: CSY33 Posts: 118	How to remove plugs from manifold? Below is a picture of the exhaust manifold on my 4-108. Coolant runs through it. I would like to remove the two half inch bronze plugs, on the side and top rear, as well as the large plug, top forward, which has a return on it. I have been straining and straining to get these to move. I used PB Blaster a few days ago and again tonight. They don't budge even with me hammering on the wrench. Suggestions? I would like access to the inside for cleaning, and the manual says that if the coolant system needs to be bled to prevent air pockets, to loosen the top two plugs when filling. This forum has been great on advising me in this refurb. Any suggestions welcomed.

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