LOL anyone on here buy a 3.5L or 3.9L GM car in the last few days here??

[misteroman]

@Skurge

HAHAHAH GM is awesome!!!

i love they always use quality parts

I think GM is #2 in quality and very close to Toyota.I know back in the day they were pretty bad tho.All our machines are made in Japan now too
D

[n20junkie]

@HotRodKid

bad cams is a VERY bad problem

the only thing worse is soft cranks or soft rods

when cams break, if they break in 2 places, thats a big chunk of steel that has to make it past the spinning crank w/o hitting anything … if it gets between the crank and block its instant catastophic engine failure

i once saw one of the early 80’s 60* 173ci engines (IIRC) that blew apart from the same problem, a section of the crank was hanging out the side of the block

it doesnt help that cams are relativly soft to begin with, its usualy pretty easy to give one a wack on the ground and break it in 2 or 3 places

I don’t see how a snapped cam could get out of its journals. I could see a lobe shreading and scattering parts, but if you snap a cam, the parts are still only at most a 1/4 in apart, it will just slide back and forth in the journals. I’ve seen rods snap and take out the cam, but never the oppisite. I’m not saying your a liar or anything, i’ve just been doing this for 15 years, and have never seen a cam do that, or even heard of it. I know engines that have even snapped cranks (turned down 400 cranks in SBC’s for 383 applications are know for it) and the engine keeps running, it makes some gawd awful noise, the rear cylinders will usually fall offline right away due to messed up timing, but the front section still in time with the cam will run till you get scared and turn it off. but you do learn something new every day i guess.

[supry]

It seems GM needs to get their sh!t together. What I don’t understand is that they’ve been building cars for well over 70 years and they still can’t seem to get it right. I mean look at the cobalt ss forums and the “Known Problems” thread, it’s a lot of stupid stuff that just shouldn’t happen. Just my $0.02. Oh and about the union workers “intentionally” breaking stuff, I’m starting to get sick of union workers too.

[psychopjv]

actually there has been GM service bulletins on the new 3.5 for quite some time now. Because the cam gears were shearing off and causing a no start condition. seen a few when i was still working at basil. Also in the past 5 months of working where i do now i have seen 2 3.1/3.4 motors come in running and have the cam broken in half. Thanks for the update though Misteroman. :tup: