Freeze Plug
There are 4 threaded holes in the LS1-LQ4 blocks. Two are for oil, the other two are for coolant. They are all universal from one block to another, just make sure you use a dab of teflon paste or pipe dope to make sure you get a good seal.
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Originally Posted by Nick@AP-Engineering
There are 4 threaded holes in the LS1-LQ4 blocks. Two are for oil, the other two are for coolant. They are all universal from one block to another, just make sure you use a dab of teflon paste or pipe dope to make sure you get a good seal.
Thanks for the info. Thread Starter
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From: Colorado
Originally Posted by ls1290
Are these the part numbers:
oil plugs: 21007339
coolant plugs: 12553191
Are there any other plugs needed for a GM bare block?
TIA.
oil plugs: 21007339
coolant plugs: 12553191
Are there any other plugs needed for a GM bare block?
TIA.


