Cracked my new Valve cover. How deep am I?
#1
Cracked my new Valve cover. How deep am I?
was replacing valve covers. While doing driver side i got too torque happy and over torqued one of the bolts. I heard a crack and it was an instant FML moment. crack is near the front of the car. The crack is at the 9 o'clock position at the bolt in the picture. Do i need a brand new valve cover? think Z1 will just ship me out one for free? lol
#3
dcains..live and learn!
well i double checked it and it wasn't a crack. that hairline "crack" is just a groove. I double checked with my old valve cover. no crack at all. what i actually heard was the breaking of the bolt itself. now i have half the bolt inside the valve head.
well i double checked it and it wasn't a crack. that hairline "crack" is just a groove. I double checked with my old valve cover. no crack at all. what i actually heard was the breaking of the bolt itself. now i have half the bolt inside the valve head.
#4
New Member
iTrader: (5)
dcains..live and learn!
well i double checked it and it wasn't a crack. that hairline "crack" is just a groove. I double checked with my old valve cover. no crack at all. what i actually heard was the breaking of the bolt itself. now i have half the bolt inside the valve head.
well i double checked it and it wasn't a crack. that hairline "crack" is just a groove. I double checked with my old valve cover. no crack at all. what i actually heard was the breaking of the bolt itself. now i have half the bolt inside the valve head.
#8
New Member
I'd buy a full set of new bolts for the valve cover and re-install it with the bolts torqued to FSM spec. Odds are you over-tightened more than just the one that broke and you have some stretched bolts attaching your valve cover now. Torque wrenches are cheap. Even good torque wrenches (i.e., Precision Instruments) aren't that expensive. There's no reason not to be covered there if you're going to be doing your own engine work.
#9
I'd buy a full set of new bolts for the valve cover and re-install it with the bolts torqued to FSM spec. Odds are you over-tightened more than just the one that broke and you have some stretched bolts attaching your valve cover now. Torque wrenches are cheap. Even good torque wrenches (i.e., Precision Instruments) aren't that expensive. There's no reason not to be covered there if you're going to be doing your own engine work.
#10
New Member
Sure. The reason your bolt snapped was because you over-torqued it. That can happen easily if you don't use a torque wrench and follow the tightening guide and pattern sequence on something like a head or even a valve cover. Since you managed to snap one of the bolts by over-tightening it, I'm guessing you over-tightened the others, causing the bolt to stretch (could be very noticeable, could be hardly noticeable). These aren't grade 8 bolts because they're meant to give so you don't damage the head when you attach them. Personally, I'd never bolt ANYTHING into a head or engine block without knowing the torque specs first, because it's too easy to mess things up. Buying a new set of bolts, using an appropriate torque wrench, OEM gaskets, etc., ensures that you're doing it right and won't run into problems down the road.
#12
New Member
iTrader: (13)
Metal has an annealment point. You went beyond on those two bolts. The others are probably close. The bolts will expand and contact with change in temperature from driving. If another snaps, you might get metal fragments under there. If the cover is sitting crooked from a ghetto install you might warp it once again from changes in temp and cause a leak.
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zakmartin (03-28-2016)
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