Broke intake cam during install

[WOTDSM]

Hey guys. I'm in the process of doing valve seal job on my 1G. Got everything back together and I was starting to install the intake cam and heard a loud snap.

Busted the intake cam right in half. Luckily my buddy has a spare set of cams from his 1G. We heard a small pop when we were doing the exhaust cam too but there is no sign of a fracture, we're using his exhaust cam anyways just in case.

Should I install the cams without rockers in them, at least the ones that are being pushed open? Or should I keep the rockers in and just do a couple turns per cap till I hit 15 ft.lbs.? Also, should I be worried about using used cams in my motor? I've heard that cams are somewhat mated to the motor that they came in from the factory, since they're scored on the cap surfaces.

Thanks for the help guys.

 

[Cdc1221]

One thing, when installing cams, use some assembly lube on the journals and lobes. How did you bend valves? Because when you remove the cams, the hlas fully extend, and if you dont bleed them before reassembly, the cams will push the valves down, causing 2 things to happen: bend whichever valves make contact with whichever pistons arte at tdc, bend/break cams, stretch cam caps, or any combination of those. And nocturnal, bending a valvehead enough to lose compression is really not so hard

 

[WOTDSM]

I just followed the VFAQ for valve seal replacement which didn't explain anything about bleeding the lifters. I had #1 at TDC and as we know, no valves are fully open at #1 TDC. You guys are really worrying me!

 

[Cdc1221]

Well time it, put it all together, and see what your compression looks like. You mightve gotten lucky

 

[WOTDSM]

Timed it, put the plugs in, fired it up real quick (because I had no serp belt on it) fired right up.

Thank god! You guys scare the crap out of me sometimes but I always appreciate the the wisdom you share!!!

 

[Ghost_92TSi]

I'd say it's not possible to bust a cam with the torque of a cam cap, bolts would strip well before then.

x2, only thing I can see is torquing opposite sides first instead of starting from the middle. and if there was something in the middle cap that would cause it to bend?

 

[Miasma]

The best thing to keep in mind when torquing anything is to always work in rotation moving between bolts farthest apart.

Outside corner, to oposite outside corner, to oposite side, to oposite corner, to which ever nest bolt is farthest. This will evenly distribute the load across the surface so no crackin or breaking occurs. This should be done with everything.

Think of how you bolt on a tire.

 

[Diamond Star Werks]

The best thing to keep in mind when torquing anything is to always work in rotation moving between bolts farthest apart.

Outside corner, to oposite outside corner, to oposite side, to oposite corner, to which ever nest bolt is farthest. This will evenly distribute the load across the surface so no crackin or breaking occurs. This should be done with everything.

Think of how you bolt on a tire.

Its not a head? This is not needed. And ibolt tires on by going in a circle.

 

[Miasma]

I do it on everything from tires to heads, valve covers, cams. Just playing it safe I guess but never had a problem.

 

[NHerron]

Its not a head? This is not needed. And ibolt tires on by going in a circle.

Tell me you mean circle as in star pattern and not literally a circle.