Engine knock @ 1700-2300

[Chambers]

Originally Posted by rstutler

...Oh, it doesnt sound like anything pounding really, more like an highly audible tongue clicking sorta sound? (bad choice of words...)

I know exactly what you mean by that sound. My car has a "knock" that you can really only hear in that rpm range. I had my father take a home made stethoscope (a piece of small diameter pvc pipe, lol) and listen around the engine while I held it around 2000rpms. He tracked down the sound coming from the exhaust side cam, cylinder 3 or 4. I took a listen and it was defiantly louder on the exhaust side right in the middle of the engine, length wise.

The valve train in the Supra basically has shims that the cam lobes push down opening the valves, if they wear incorrectly that could very possibly create the "knocking" sound. I haven't had a chance to take the valve cover off my car yet to see if it is a shim, but its something I plan to do soon.

Hope this helps a little, it's at least a place to look.

[rstutler]

Originally Posted by Chambers

I know exactly what you mean by that sound. My car has a "knock" that you can really only hear in that rpm range. I had my father take a home made stethoscope (a piece of small diameter pvc pipe, lol) and listen around the engine while I held it around 2000rpms. He tracked down the sound coming from the exhaust side cam, cylinder 3 or 4. I took a listen and it was defiantly louder on the exhaust side right in the middle of the engine, length wise.

The valve train in the Supra basically has shims that the cam lobes push down opening the valves, if they wear incorrectly that could very possibly create the "knocking" sound. I haven't had a chance to take the valve cover off my car yet to see if it is a shim, but its something I plan to do soon.

Hope this helps a little, it's at least a place to look.

Wow man, definitely let me know what you find out. Have you been running your Supra at all?

[Chambers]

Yea, I drive it every day. I always let the engine run for about 3 to 15 mins to make sure the oil gets to all parts of the engine, I think the "knock" came from using the wrong oil. The previous owner ran strait 40 weight in it and I know he was hard on it because he drifted it, so I can only imagine that the "knock" developed from those factors.

I stopped by a Toyota dealership today to see if they could get me the valve shim remover tools and no luck, they didn't have any for them selves to use and they couldn't get them. If it is the shim making the "knock" then I'm going to have to fabricate something to get it done.

Yea, I'll let you know what happens. I think I will take the valve cover off this weekend when I do the sparkplugs and wires. Good luck!

[h8z2luze]

Again thats how mine started out exactly what you guys are saying. Louder on one side I had a stethiscope as well but one made for just that and i know the sound your hearing trust me lol Like I said mine ended up being a rod bearing.