d15z1 vx, have had the car up on jack stands, searched the internet, this forum. There is only one side of the block depicted on the helms website, that i can access. Used the mirror to look up behind the exhaust manifold, while the car was up on jack stands. I can see the top of the block, but no freeze plug. I ordered a freeze plug heater for the vx from napa, the description says that it is 28mm, the only thing i found on the web where the block is concerned is the 28mm drain plug on the front trans end of the block.
I will try to take and upload a picture for you in the next couple of days. For easy access since you are planning on installing your block heater - you should remove your radiator first to give you some room to work.
Yes, it's on the side of the engine at the front of the car. Technically, the front of the engine is at the timing belt. I'm going to position my digital camera in the space between the inside of the radiator and the block to get a good shot of it. I have removed this plug a couple of times before. Again, it's easier to work on it when you pull out the radiator first.
The freeze plug is the first photo of seven shown.
AKA the cylinder block drain bolt.
IIRC, freeze plugs are supposed to pop out if the coolant freezes, preventing engine damage due to the expanding ice. That drain bolt won't pop out, and I don't think anything else on the block has such a function. So technically, there is no freeze plug.
Sorry I'm not familiar with that engine. Usually there's one freeze plug at each cylinder along side of block. Or between cylinders. On the block, not on the head. So would be lower than the exhaust manifold connections. Maybe not easy to see with the downward-aimed piping in the way there.
Might be easier to see once you get your part. You'll know what shape you're looking for. I've only seen them round, but you never know.
Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.