Guys, I recently had a leak in my oil filter cartridge and it was time for an oil change. So I converted to a spin on oil filter and switched to Brad Penn 30wt oil. Now this is a 59,000 engine that has never been apart. At the same time I bled my brakes, so after I took it out to make sure the brakes felt ok. Under load at about 3500 rpm I heard what I think was bottom end noise, It sure sounded like rod noise, but I didn't want to push it any more, so I shut it down to figure out what was going on. It has good oil pressure. I really feel that the Brad Penn oil is awfully thin. Almost feels water like as compared to the thickness of say a Pennzoil or other conventional motor oil. The spin on conversion is pretty fool proof , so I don't think that is a problem, I think it is the thinness of the oil?? I may just change it and see. Any ideas, what do you think?? Ideas? Don
engine noise
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Re: engine noise
I'd be shocked if it was related to the oil. I've used Brad Penn (or Penn Grade) for many years now. If you have good oil pressure, I myself believe that answers the question about the oil viscosity IMHO.
I suppose the easiest thing to do is drain the oil and see what you find. Whose spin on conversion did you use?
Tim- Top
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Re: engine noise
Don in the early 90's when synthetic oil was becoming popular i decided to switch to it in my high milage pickup truck. Within 1 mile i wiped out a rod bearing. I figured that the different oil caused whatever gunk that was holding the bearing together got washed away. I use Brad Penn in my 67 with a rebuilt motor and 20 50 in my 65 which i dont know the milage on but the odometer reads 30K so it is at least 130 K- Top
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Re: engine noise
Engine type?
Model year?
What type of spin on did you use?
What is good oil pressure, and how are you reading it...factory gauge I assume?
Did you verify the bypass valve works in the spin on adaptor?
Hook up a manual oil psi gauge to the block port or adaptor port and get a real oil pressure reading.
Cut open the filter pull the pleats apart inspect it and the drained oil.
Report back- Top
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Re: engine noise
Don, if there is a rod bearing issue, you may see fine metal partials suspended on the oil dip stick when you look at it in the sunlight. If the car has a auto transmission you can check for a cracked flywheel.New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.- Top
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Re: engine noise
Since the noise began when the oil filter was converted, switch back and see what happens.
Why are you using straight 30 weight oil? It may not be flowing as well when cold.Mark Edmondson
Dallas, Texas
Texas Chapter
1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top- Top
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