Cascade Crew

Al Hasse · Posted: Fri May 05, 2006 6:27 pm Post subject: Noise on acceleration...

I have developed a noise (loud rattle) when accelerating through the gears. Kind of sounds like the valve train. Had a mechanic listen on my way home this afternoon and he seems to think so too. Since I drove it pretty hard this weekend, it might be a good idea to have that checked. Engine has about 3000 miles on it and valves have been adjusted once at install and once at about 700 miles. I've made an appointment to have the noise diagnosed and, since I lack the time and proper tools, adjust the valves again if necessay. Car runs pretty good otherwise.

Xophertony · Posted: Fri May 05, 2006 6:37 pm Post subject:

hope it's just in need of adjustment. what kindof a waranty did that engine come with?

BTW my engine makes a loud noise on acceleration too Cool

Al Hasse · Posted: Fri May 05, 2006 6:54 pm Post subject:

Xophertony · Posted: Fri May 05, 2006 7:04 pm Post subject:

Al Hasse · Posted: Fri May 05, 2006 7:15 pm Post subject:

Xophertony · Posted: Fri May 05, 2006 7:39 pm Post subject:

yeah, they might know somthing was up when there are holes burned in your pistons from detonation..... suspension is a GREAT idea on a six. build on what the car has, excelent balance. i was just talking to chris today about how i used to do all kinds of crazy moves in my 2.8. i loooovve the way they handle.

hey i just thought... you have a wonderbar right?

since your rolling 17"s you are in the "high risk" size for seperation of your steering box from the frame. with larger wheels our frames have additional flex in turns. this flexing can cause cracking of the frame where the steering box mounts, causing more flex.. which causes aditional cracking.... it's a vicious cycle. the additional slop in the frame also adds to the "flex steer" of the car. by this i mean the ammount by which your steering geometry changes due to frame flex.

in later years GM installed a lower steering brace on all camaros with 16" wheels to combat this seperating effect. the result of installing one on a car never equiped is a slightly tighter feeling in the front suspension, as well as piece of mind that you will not suffer from flex-steer. i would recomend the TDS wonderbar, at $55 it is a steel (ha, steel/steal, get it Laughing

). it is better then most out there due to it's third bolt hole. it also includes powder coating in that price.

/speach

Al Hasse · Posted: Fri May 05, 2006 8:09 pm Post subject:

No wonderbar yet. Car is bone stock except for wheels and interior mods. Soon as I get most of the minor "bugs" taken care of, I'll start on the suspension and chasis - piece by piece Very Happy

Xophertony · Posted: Fri May 05, 2006 8:17 pm Post subject:

right on.

i never did any work to my rear suspension (cause i liked it when it broke loose) but i did a full on re-build of my front suspension/steering, with the exception of shocks and shock mounts. (oddly two of the more important pieces Rolling Eyes

)

BigDaddyVu · Posted: Fri May 05, 2006 11:41 pm Post subject:

its the classic v6 predetenation check your timming

Al Hasse · Posted: Fri May 05, 2006 11:53 pm Post subject:

Twilightoptics · Posted: Sat May 06, 2006 7:58 am Post subject:

How odd, I just had a rocker loosen up yesterday!

Glad it was an intake. Rans rather well on 7 cylinders with vibration. I bet I could still take out some 305s and stock 350s!

chevymad · Posted: Sat May 06, 2006 8:03 am Post subject:

My first thought was predetonation as well. Especially with your EGR troubles. The main purpose of EGR is to stop predetonation. However, unless something is very very wrong you shouldnt get it in a no load situation.

Twilightoptics · Posted: Sat May 06, 2006 8:18 am Post subject:

Pull your plugs out and recheck them. Every motor I've built had to replace the plugs shortly after it's first run. Don't know if you already did that or not.

Check timing definitely, Brandon is the Grand Master.

I just noticed in my Jeep owners manual that it says to replace the plugs every 30k miles! Holy crap thats pretty soon IMHO. So at 36k I decided to check em. All the gaps were .050 - .060!!!! and the hood says .035 gap.

No wonder I ping a little and dont' get quite the milage I thoguht I would.

chevymad · Posted: Sat May 06, 2006 9:01 am Post subject:

LMAO. and Jeep/Chrysler uses those awesome Champing plugs too. Blow on them and they wear out.

Twilightoptics · Posted: Sat May 06, 2006 9:03 am Post subject:

I got the rig at 31k. They should have been changed, but these are older than 5k so I'm going to assume they are factory... or whoever put them in was an idiot. These are NGKs.

chevymad · Posted: Sat May 06, 2006 12:04 pm Post subject:

Vote for idiot then. Anything from dodge uses champion.

At least anything old enough i've seen em at work.

Al Hasse · Posted: Wed May 10, 2006 2:29 pm Post subject:

Good news, sort of. Noise is not from the valve train. Mechanic had the car on a lift and heard it from underneath. Unsure though if it's the lower end (doubtful) or the tranny, which is still original.

aaron_sK · Posted: Wed May 10, 2006 3:08 pm Post subject:

Have you checked the exhaust? Could be tapping against the body somewhere.

Al Hasse · Posted: Wed May 10, 2006 3:41 pm Post subject:

Twilightoptics · Posted: Wed May 10, 2006 3:49 pm Post subject:

If it's exhaust you wont typcially hear it at all when you let off the throttle. It's most predominate under acceleration. Even cruise will quiet down.