af908

So i went to ebay and got a remanufatured head (0331 casting), threw it on and noticed there was coolant leaking near the back of the engine when i was filling up my coolant after installing the head.

Turns out it was just comming out of a threaded hole near the rear of the head, my old head didnt even have a hole in this area, so i have no bolt to use to block it off, its going to be a pain to go to the hardware store to try to match it up, so if anyone can tell me where to order this block-off bolt, or even the thread size and bolt length so i can match it up at the hardware store thatd be great.

Heres a pic

freegdr

its prob just a brass plug that is need there 1/8 or 1/4 inch

peep

Use some teflon tape on an npt plug, yes probably 1/8 or 1/4 npt size. Could go with a temp sending unit to an aux guage, rear of engine can run hotter than front sensing position, engine info can be useful.

mcssls

I think mine has a temp sensor there.

peep

mcssis, nice hood vents.

freegdr

yep renix temp sender goes here

mcssls

mine is far from a renix

djb383

Just as important as the 1/8" or 1/4" size is the NPT (National Pipe Thread).

af908

Thanks guys turns out it was 1/8". I used a bolt from napa with a square head on it. Works great so far. Thanks again

XJDavid

Glad to see I'm not the only one who heard coolant hitting my garage floor as I filled my rad! Sucks, now my VC is leaking from the rear where antifreeze hit it. Bought your head from some guys out of Florida I presume?

peep

Check the parentage, there is some renix in every 4.0