Howdy All, About a month back my heater core started to dump coolant on the passenger floor board. I bought 5 feet of heater hose and by passed the heater core. I drive my F/B every day. The only car I have. On the way to work this morn the right front freeze plug took a dump and started puking coolant out. I had all the f-plugs replaced 5 years back. So I guess my question is, When I bypassed the heater core is their a possibility it would increase the pressure to a point where a freeze plug would leak if the mech might have messed up some when they put new one's in?

 

Bypassed heater core would not have anything to do with a freeze plug leaking.
When your mechanic replaced the freeze plugs, did he use the cheap steel ones or the better brass ones? The brass ones will last a long time. I have found the cheap steel ones at most parts stores are China made, and probably not up to the quality of even the oem steel ones.
Also are you sure all of them were changed and your mechanic didn't just change the easy ones or just the ones that were leaking.
Make sure you change your coolant every 2-3 years, old coolant looses its corrosion inhibiting properties and heater cores, rads and freeze plugs won't last long.

 

Unfortunately the cheap chinese ones. I was at the shop when they were delivered. They did replace all. Now Im concerned about the remaining one's. Thanks for the reply.

 

Since all of them were replaced at the same time, you can assume that they're all in the same poor condition as the rusted out one.

There's a couple of plugs in the front and back of the block as well.