is this my knock problem?

[ppress79]

Just installed a 01 Vortec motor and have been trying to find a rattle type sound when in gear and at @ 1800-2200 rpm that is being picked up by the knock sensor. So today I am to the point of taking the engine out and going into bearings as a last resort. Got everything on top removed and take dist. cap off and when I went to remove the rotor I find the ring/shield directly below the rotor loose. It moves up and down @ 1/8" and rotates @ 1/4". Since its right next to the sensor I have a feeling this is my problem but I want some more input before I swap distributors and bolt it all back together.

Phil

 

[jpalmer]

Re: is this my knock problem?

it could be the culprit. bolt it all back together to find out

 

[dgoodhue]

Re: is this my knock problem?

My stock distributor metal ring/shield has some play in it, I think that is normal. You could be picking a noise in the torque converter. Unless you can hear some noise engine, I would try relocating your knock sensor (or installing another one) to a different location. The Knock Sensor has to be torqued down to specified torque spec or it will affect it sensitivity. My knock sensor is installed on the front on my intake manifold. (Adapter on one of the IC metal line holes)

 

[aasltmike]

Re: is this my knock problem?

My stock distributor metal ring/shield has some play in it, I think that is normal. You could be picking a noise in the torque converter. Unless you can hear some noise engine, I would try relocating your knock sensor (or installing another one) to a different location. The Knock Sensor has to be torqued down to specified torque spec or it will affect it sensitivity. My knock sensor is installed on the front on my intake manifold. (Adapter on one of the IC metal line holes)

Got a pic of how you did that? Might be something I might look into doing to mine. Thanks.

 

[dgoodhue]

Re: is this my knock problem?

You can see it in this picture, its next the upper radiator hose. I have an adapter that threads into the hole. Someone else did it for me, and they had to rethread the adapter to make it work. I made the wire extension from a knock sensor test fixture I had bought for my 86 Corvette, so I didn't have to cut the wiring harness.

 

[SyTyAddict]

Re: is this my knock problem?

Edit: I didn't pay close enought attention to the post, I thought you were have a false kr issue.

What knock sensor are you using the syty one or the one from the vortec motor? I have heard that the knock sensors off of the newer engines are too sensitive.

 

[ppress79]

Re: is this my knock problem?

The ring has alot of slop or alot more than any other I have seen. I just don't know if this can be picked up by the sensor.

I am using a Sy/Ty sensor torqued to 14 lb/ft as specified on this forum.

The rattle can be heard when driving or if I brake torque the engine to 1800 and up.

 

[ppress79]

Re: is this my knock problem?

This is alot more slop than normal. I am curious if this can be picked up by the sensor.

I am using the correct Sy/Ty sensor. I drilled and tapped the original hole at the back of the block and the sensor is torqued to 14 lb/ft.

I can hear a rattle/ flutter at @1800 - 2200 while driving or if I brake torque the engine. I can't hear it if I rev it in neutral. It isn't a deep knock like rods.

 

[ppress79]

Re: is this my knock problem?

This is alot more slop than normal. I am curious if this can be picked up by the sensor.

I am using the correct Sy/Ty sensor. I drilled and tapped the original hole at the back of the block and the sensor is torqued to 14 lb/ft.

I can hear a rattle/ flutter at @1800 - 2200 while driving or if I brake torque the engine. I can't hear it if I rev it in neutral. It isn't a deep knock like rods.