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Junior Member
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93 Posts
Discussion Starter #1
I had a core plug blow out. I have inspected the other plugs and there is no sign of leakage. I THINK I want to increase the size of the center dimples on the plugs that did not fail, but am afraid that it may cause the seal to start leaking, or the plug may fail. Does anyone have any thoughts on increasing the size of the dimple on plugs that have been installed for 15,000 miles?
 

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Old Fart
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889 Posts
You are talking about the 'freeze plugs' on the sides of the block? I have built several engines, in my day, and never had one leak or come out. I would leave them alone if they are NOT leaking.
 

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Junior Member
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93 Posts
Discussion Starter #3
yes, the plugs I am talking about are the freeze plugs. They are not the cup type. they are the concave wafer type. I installed them when the engine was out for repairs. I used the ball end of a ball peen hammer and struck the flat end with another hammer until I had a dimple in the plug as close to center as I could get by eye. the one near the oil filter on the left side blew out and I lost the coolant. I stopped almost immediately and did not cook the engine. I installed a new plug and coolant. Now I question the rest of the plugs. I even pulled the tranny to see the two plugs on the back side of the block. No sign of leakage anywhere. I guess I am having feeling of insecurity. my question is probably should I use a socket on the end of an extension and give the plugs that are in the engine another strike or two to make sure another plug does not fail. I fear that after being in the engine for a while I might weaken the seal that is there. your thoughts? Thanks.
 

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Old Fart
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889 Posts
The ones I have installed had no sealant, so striking them some more should not hurt the plugs any. I have never hit them after being installed.
 
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