head bolt problem
#1
head bolt problem
hey guys thanks in advance for the help here.. well heres my problem. i blew my head gasket about a week ago. so i pull it all apart clean it all up and get ready to put it back together. every were i read and have been told is to run a tap thru the bolt hols to make sure they get the best clamp they can.. no problem. well if your me you us a 12x1.5 tap instead of a 12x1.75. how i pulled this off i dont know.... dont ask because i just plain screwed up. well now u prolly figured it out i cant bolt my head tight now cuz they just wanna pull the threads out. so i was woundering if i could tap it to a 1/2 bolt size and run 1/2 bolts instead of 12mm. would a grade 8 bolt hold up as a head bolt or no? or do i need to drill and tap to a 14mm and just stud it? im kindof on a budget here so the cheaper i can get it fixed right the better.. so lemme know your ideas... thanks a bunch guys
#2
wow sorry man , a few things to consider. if you upsize the bolts are you going to have to drill out head also , will you hit critical passages etc. also torque specs are designed for certain sized bolts. believe it or not too much torque can be just as bad as not enough, eg at the same torque value a grade 8 will stretch less than a gr 5 which means different clamping force. maybe im overthinking it . hope someone with more experience has a solution for you. good luck
#3
#4
well my buddie works at pure diesel power and said he can get me a used set of 14mm studs for like 100 bucks. they were only used for a short time in the shop on a motor. so im thinkin thats gonna be my best option.... do i have to get the head drilled out to fit the 14mm studs? any one have a rough estimate on how much that costs? should i get the head resurfaced while im at it?
#5
#7
Thread
Thread Starter
Forum
Replies
Last Post
burndiesel
24 Valve 2nd Gen Dodge Cummins 98.5-02
10
02-07-2023 01:15 AM
TheMacster
5.9L 24V Performance
2
04-14-2015 07:01 PM
klein444
6.2L & 6.5L Performance
7
04-14-2015 09:04 AM
NiNjAassasin545
12 Valve 2nd Gen Dodge Cummins 94-98
0
12-02-2014 11:40 PM