Noise coming from the engine, Knocking sound or Piston slap? Help, idk Options

[naxxal]

Hello everyone,

I have purchased 2 weeks ago a used 1995 St manual with 167,000 miles for $900.00 from my buddy, the condition of the car is great, except because friend of mine wasnt very cautious and carefull of his car, slacking on little problems causign others, anyways, my problem is this.

At idling i hear knocking sound coming from the engine, listening closer i would think something sounds like there is a little problem.

1. Valve knocking
2. Piston slaping
3. Engine mount
4. Or i do not know

a. Did some research, id there and engine knock than it needs to get adjusted, HOW?

b. If there is a piston slap, check which one by disconnecting a spark plus wire from each cylinder at a time untill knocking stops to get the right one, if so, Than WHAT?

c. Could it be an engine mount? Is so, than if i fill it with polytherine, from experience it will eliminate wheel hop but make higher vibrations, but will it mount better? sounds silly when someone may fill in broken engine mount to fix it, is it not?

If it something else let me know, please, i am slowelly repairing and tuning it up, so let me know, cause i want it to work well, thanks.

[DrAg1n320]

Hey, thought i'd be able to chime in a little bit here, Uhm, if your car is a 95 st, it doesn't have lifters in it, if i'm not mistaken, most if not all 6g celicas have over head cams. If you have a knocking sounds, you will rule out engine mount because rubber insulators don't make a knocking sound, if the knocking sound were in the block, the sound increases as you rev the engine, it's most likely a rod knock coming from your block. if the knocking sound were in the head, you'd most likely have a misfire due to one of the valves snapped in half and not allowing any compression in the cylinder. Hope to hear it soon.

[alltracman78]

Hey, thought i'd be able to chime in a little bit here, Uhm, if your car is a 95 st, it doesn't have lifters in it, if i'm not mistaken, most if not all 6g celicas have over head cams. If you have a knocking sounds, you will rule out engine mount because rubber insulators don't make a knocking sound, if the knocking sound were in the block, the sound increases as you rev the engine, it's most likely a rod knock coming from your block. if the knocking sound were in the head, you'd most likely have a misfire due to one of the valves snapped in half and not allowing any compression in the cylinder. Hope to hear it soon.

Just FYI, they DO have lifters.
The buckets are considered lifters.

The cam lobes hitting the shims on top of the lifters creates a ticking sound.
Whether it's his or not I don't know, but it's VERY common on Toyotas.
Not much you can do about it.