Head studs leaking coolant

Tim H · 07-07-2014, 07:34 PM

Engine had studs before I bought it and we replaced them with new ones as part of the freshen process. Block is fairly old (30 years approx) and compression is 13 to 1. I do recall a pile of black silicone type sealer on the old studs and some of the threads were in tender shape so we chose studs in an attempt to preserve block and apply that "more even clamping force" that studs offer. Unfortunately coolant got into the oil and now it no longer turns over smoothly. It is out of the car and partially apart,pushed to the side and my old reliable but tired 468 is back in. Just got tired of wrenching on this 496 and want to go racing before our season is over.I think block could use heli-coil inserts for most if not all the head bolt (stud) locations.

07-07-2014, 07:34 PM	#13
Tim H VIP Member Join Date: Jan 2007 Posts: 1,044 Likes: 1,086 Liked 484 Times in 160 Posts	Re: Head studs leaking coolant Engine had studs before I bought it and we replaced them with new ones as part of the freshen process. Block is fairly old (30 years approx) and compression is 13 to 1. I do recall a pile of black silicone type sealer on the old studs and some of the threads were in tender shape so we chose studs in an attempt to preserve block and apply that "more even clamping force" that studs offer. Unfortunately coolant got into the oil and now it no longer turns over smoothly. It is out of the car and partially apart,pushed to the side and my old reliable but tired 468 is back in. Just got tired of wrenching on this 496 and want to go racing before our season is over.I think block could use heli-coil inserts for most if not all the head bolt (stud) locations.