zjbarra

iTrader: (2)

I've been having a bunch of problems with my turbo 2 with excessive vibrations. I figured it was timing related for a while but I'm starting to suspect the flywheel I have installed. It's an aftermarket steel flywheel and it's a 2 piece. The counterweight is a Racing Beat while the flywheel itself is something different I think. The flywheel was used in a 87 Turbo 2 previous to my buying it but with a different counterweight. Previous to installing it I had the flywheel resurfaced with the factory step height at a local napa with a machine shop and installed it. Both surfaces betweent he flywheel and counterweight were machined and mated up flush. The clutch is functioning fine and the vibrations happen both with the car parked or when moving. One engine mount was replaced and the other looks good so I think this is kind of limiting my options. The compression was 105 per face with a piston checker minus the check valve which from waht i understand is pretty good.

I guess that leaves the question: Do they check balance usually when they machine flywheels? Would using a counterweight and a flywheel that were different brands cause a problem like this? Everything went together well on the setup. The pressure plate bolts on fine, it fit to the engine shaft well and I torqued it down to the right numbers. I just get a bad vibration at about 1200 rpms up to about 1800 and it smooths out a little bit but not very much. Could this be attributed to the flywheel? It doesn't shake very much at idle (1k given my setup) but still more than it should. Thanks, -Zach-

88IntegraLS

what kind of shake? rotational, translational, or a combination?

What counterweight is it? A counterweight from something like a S5 TII might throw off ur balance.

drago86

I wouldnt have let the machenist touch the counterweight at all, machining it would change its weight distributiion. What years is your car, and whay year is the counterweight for? If all this checks out its most likly your transmission mount, thats what it turned out to be on my car (motormount was compounding it too though.)

zjbarra

iTrader: (2)

counter weight was not touched actually. That was worded poorly. Both surfaces were machined from the factory that are mating up, NOT by the machinist. The flywheel was actually resurfaced without the counterweight being attached.

As far as which counterweight it is, is there a way to tell if it's a series 5 counter weight? What would be the difference between them in a way that I could identify it by looking at it or weighing it or whatever has to be done? The vibration is the engine just shaking a as much as it can while mounted which makes a very fast short distance of travel shake that vibrates everything progressively from the front of the car to the back.

Has anyone ever ran a S5 counterweight by mistake and had this happen?

Added: I was told the counter weight was for a s4 but I don't know this for sure. When your tranny mount went out could you see the fault in it or did you have to remove it to see it? I grabbed my mounts and checked them at one point and they seemed ok from that crude inspection.

uRizen

iTrader: (2)

Do you know what kind of condition your injectors are in? I've had the same problem, and all my driveline equipment and mounts look good, but I know for a fact that I have crappy injectors, and it causes the engine to kinda jump around when it's idleing and my poor shift lever does a little dance too.

zjbarra

iTrader: (2)

The primary injectors are a used set of 550's from the car previous to the engine swap. I attibuted it to a possible bad injector so I replaced it with the set of trailing injectors I had (using 1600's in the secondaries) and found that the problem was no different at all. Unless I happen to have 2 bad injectors that both went out and got put in the same spot when they got swapped, I'm thinking it has to be something else.