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Post  D's557BBF on Mon Aug 05, 2019 7:13 pm

Long time member needs some help with  my 306 SBF (I know, I know) It has developed a knocking or ticking sound but only when the car warms up to 185/190 degrees. I have eliminated any thought of bad plugs and wires by replacing all that stuff.  I pulled the passenger side valve cover off check rockers everything seems normal with nothing loose. Gonna pull the driver side when the car cools off but if it was a rocker it would do it all the time not when it gets hot...please help, I'm stuck!!!

I'm posting three videos
the first one is right after new spark plugs and wires first start up car cool runs great. The second video is the car at 190 degrees ticking starts and the last video is more ticking at 195 degrees!

https://photos.app.goo.gl/CLSEftjy5KmaJPMC7

https://photos.app.goo.gl/hpiKaS9DNDsEY7HW8

https://photos.app.goo.gl/3Jzn5KMmXth75mwh8


Last edited by D's557BBF on Mon Aug 05, 2019 9:04 pm; edited 2 times in total
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Post  D's557BBF on Mon Aug 05, 2019 7:53 pm

waiting on bruno to post the video's for me!!
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Post  rmcomprandy on Mon Aug 05, 2019 9:07 pm

Sounds to me like a main bearing clearance issue or a cam bearing issue. Hope I'm wrong.

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Post  D's557BBF on Mon Aug 05, 2019 9:17 pm

Randy, wouldn't it (main bearing clearance or cam bearing) make the noise at start up while cold? I don't know, just asking!!
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Post  stanger68 on Mon Aug 05, 2019 9:26 pm

I’ve seen the same thing on a Cleveland rod bearing . Hope I’m wrong too.

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Post  rbro460 on Tue Aug 06, 2019 12:30 pm

I had a 95 F250 with a 351w that made a slight noise when idling. When cold, you put a load behind it, like backing up, it would
knock like hell. Rod. But if you let the bearings warm, it wouldn't knock. Drove 125k like that.
Try putting a load on it to see if it just needs pumping up? Or you have more issues.

How many miles on this?
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Post  D's557BBF on Tue Aug 06, 2019 6:28 pm

Ok here goes, Came from work today and cut the oil filter...Looks brand new inside!!!

https://photos.app.goo.gl/kFgmLQuKa22aCjPq9

https://photos.app.goo.gl/iXke6icWycPmhQYFA




Next, I got under the car and rotated the flexplate around only to find this. Looks like the counter weight on the flex plate was hitting the starter plate!

https://photos.app.goo.gl/PkmzCEYpoYqMsaaL7

I just bent the starter plate out about 5mm and NO MORE KNOCKS AND TAPPING AT 190°!

Thanks for all the help guys!!
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Post  bruno on Tue Aug 06, 2019 8:38 pm

sweet , that was a relief !!

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Post  Mark Miller on Tue Aug 06, 2019 10:28 pm

D's557BBF wrote:Ok here goes, Came from work today and cut the oil filter...Looks brand new inside!!!

https://photos.app.goo.gl/kFgmLQuKa22aCjPq9

https://photos.app.goo.gl/iXke6icWycPmhQYFA




Next, I got under the car and rotated the flexplate around only to find this. Looks like the counter weight on the flex plate was hitting the starter plate!

https://photos.app.goo.gl/PkmzCEYpoYqMsaaL7

I just bent the starter plate out about 5mm and NO MORE KNOCKS AND TAPPING AT 190°!

Thanks for all the help guys!!

I may be crazy but I would think it should have been making that noise hot or cold if the flexplate was the problem?

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