i've just purchased an Oil pressure gauge and was going to just use the "Brass T-fitting" method...but I read a thread that brought up the greddy sandwich adapter (http://www.modacar.com/products/Honda/Civic/MODAOICO/) are these safe to have on the back of the block? I read that they are made aluminum so they seem light enough? would these be heavy enough to cause any damage/cracks to the block? Thanks for all the help in advance

 

No it will not damage the block.

 

yeah, sandwhich type is much more safer than using oil from the pressure sensor...i'm getting my GE sandwhich plate soon...

 

My experience says yes -safe. I've had a B&M oil cooler with spin on adapter and before that ran a sandwich plate. Never had a problem with either one.