Cyl Head coolant plug - ZR-1 Net Registry Forums

tpepmeie · 09-14-2016

I know of at least two high-rpm engines which have had the rear coolant freeze plug blow out of the cylinder head. Once was about 10 years ago on a chassis dyno at BG. That was a 415 engine. And just recently a race car suffered the same fate, at speed. There may well be other examples of these plugs blowing out. I think it is usually the driver side.

Not going to take that chance with the new 427 build. 3x #2 drive screws on each head.

#attentiontodetails LOL.

09-14-2016	#1
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 814	Cyl Head coolant plug I know of at least two high-rpm engines which have had the rear coolant freeze plug blow out of the cylinder head. Once was about 10 years ago on a chassis dyno at BG. That was a 415 engine. And just recently a race car suffered the same fate, at speed. There may well be other examples of these plugs blowing out. I think it is usually the driver side. Not going to take that chance with the new 427 build. 3x #2 drive screws on each head. #attentiontodetails LOL. __________________ Todd ____________________________________ *** our email address has changed! info@pepmeierengines.com pepmeierengines.com Friend us on Facebook too: www.facebook.com/profile.php?id=100011443683384 Pepmeier Engine Development