The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 What's going wrong inside my 350?

1project2many · 01-04-2019, 12:01 AM

dsraven's suggestion to cut the oil filter open has merit. I haven't ever heard a noise that loud from oil flow through a bypass valve but I'll keep an open mind. Thinking back, that noise is vaguely familiar but I can't place it. I have heard a dry rear main seal make noise like that but IIRC that was a one piece rear main, not the two piece you're running now. I suppose a tight set of rings could make a noise and potentially so could a thrust bearing that is too tight fore and aft.

I'm waiting patiently to see how this turns out.

01-04-2019, 12:01 AM	#38
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,158	Re: What's going wrong inside my 350? dsraven's suggestion to cut the oil filter open has merit. I haven't ever heard a noise that loud from oil flow through a bypass valve but I'll keep an open mind. Thinking back, that noise is vaguely familiar but I can't place it. I have heard a dry rear main seal make noise like that but IIRC that was a one piece rear main, not the two piece you're running now. I suppose a tight set of rings could make a noise and potentially so could a thrust bearing that is too tight fore and aft. I'm waiting patiently to see how this turns out.