EASTIDEE123

Hi I'm current installing my Holly systematic intake manifold on my aluminum heads . For some reason my bolts keep snapping I torque the first set of bolts to 7lbs then I went to 14lbs and two of them snap . On my intake manual its says 22-24 lbs . I don't know what I'm doing wrong this is the first time I have done this if anyone can please help thanks .

jwog666

not sure, thats the correct spec, are you using the correct new hardware, or just some random bolts? have you tried another torque wrench? maybe yours is faulty.

88 orangepeel notch

Are you sure you have the torque wrench set correctly. Those bolts should not break at 14lbs.

Maybe 140lbs, but not 14llbs.

silver91gt

Ive broken a couple at 12 ft/lbs before. Long story short.. I don't trust old used factory hardware anymore. I did MPI on the remaining bolts I had after they broke, and every one had cracks running through most of the threads.

EASTIDEE123

I have all new hardware that came with the intake , and I check my rached twice to make sure .

mjr46

try buying a good set of bolts = arp or even better yet intake studs by arp.....they'll help with shift

yurizx6r

Like mjr46 said, buy ARP bolts. I have them on my intake (and everything else). Trust me, if you break an ARP bolt........there's a serious problem (YOU). Check your torque wrench too. Harbor freight sells an electronic one that you attach to your ratchet that I've heard good things about. Be sure to use thread sealer on the bolts near the water jacket!

EASTIDEE123

Thanks guys I tighten them down with a racket but I'm going to buy the arp bolts and try them on .

bluebeastsrt

LOL Please never mention Harbor Freight and good things in the same sentence. The company exists sole for the guy that doesn't care if the tool will last thru the year or can't afford quality tools.

mjr46

it depends what you buy from harbor freight...........90 percent is junk.......however, some things like their impact sockets I have been using for 15+ years and have yet to break one and they get used daily......however that is about all I'd use from them, just can't stomach the 400+ price tag for snap on impact stuff.