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Old 07-14-2019, 11:30 AM
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ticking sound

I have a chevy small block 350, performer cam, performer rpm intake, 487x heads and flat top pistons. Anyhow, I had a lifter go bad so I changed the lifters and everything is running great, but in the morning when I cold start it, I get a ticking sound for2-3 seconds, just until I get full oil pressure.

I am thinking it is becaue my filter does not have an anti drainback valve. I have done a valve adjustment twice on the side it is coming from. What do you guys think is is?

It is a hydraulic flat tappet motor, 70's 010 block

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Old 07-14-2019, 01:53 PM
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Chevrolet oil filters do not need or have a anti drain back valve. Only oil filters that are mounted horizontally need a anti drain back valve. Such a Ford filters.

Modern camshafts with lobes that have fast valve acceleration ramps and are used with standard lifters that have 0.125” total plunger travel will have lifter noise until the lifters pump up to the proper preset preload, which is half-travel or about 0.060” preload. I prefer to use Comp Cams 858-16 limited travel lifters that are set at 0.002”-0.005” preload. You must use poly locks with 7/16 rocker studs to hold the tight lifter preload. Stock length pushrods can be used.

Unfortunately, I don’t have limited travel lifters in my 1962 Chevrolet with a 350 engine because I did not build the motor. Apparently, I don’t need those lifters with that engine since they don’t pump up and float the valves at the 5,500 RPM shift points with a GM Soft touch -151 (L79) camshaft and GM 3911068 (Z28) valve springs.

GM first used Melling limited travel lifters in the 1969-1970 Pontiac Ram Air IV Engines.

Last edited by MouseFink; 07-14-2019 at 01:58 PM.
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Old 07-14-2019, 02:01 PM
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Most likely a lifter with a tiny amount more plunger-to-body clearance is leaking down under spring pressure overnight. Not a issue if it clears up like you say it does, quite common even with stock engines.

It's not the oil filter, a filter with an anti-drainback valve would do nothing on a SBC, as the filter mounts vertically and the oil never drains out of it while sitting.

Anti-drainback valve in a filter only has a purpose on engines where the filter is mounted on some other angle than straight up and down....like most Ford V8's.
It is just there to keep the filter full of oil.

Anti drainback valves do not keep the engine's oil galley system full when the engine isn't running, it keeps just the angled filter full. Oil elsewhere in the feed galleys bleeds off through all the clearance points.
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Old 07-14-2019, 02:14 PM
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Gen 1 engines with oil coolers are spec'd to use filters with an anti drainback valve as the cooler will empty when sitting for much duration. The ADBV doesn't hurt anything and in the G1 engine keeps the rear vertical gally full of oil when shut down.
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Old 07-14-2019, 02:50 PM
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Quote:
Originally Posted by ericnova72 View Post
Most likely a lifter with a tiny amount more plunger-to-body clearance is leaking down under spring pressure overnight. Not a issue if it clears up like you say it does, quite common even with stock engines.

It's not the oil filter, a filter with an anti-drainback valve would do nothing on a SBC, as the filter mounts vertically and the oil never drains out of it while sitting.

Anti-drainback valve in a filter only has a purpose on engines where the filter is mounted on some other angle than straight up and down....like most Ford V8's.
It is just there to keep the filter full of oil.

Anti drainback valves do not keep the engine's oil galley system full when the engine isn't running, it keeps just the angled filter full. Oil elsewhere in the feed galleys bleeds off through all the clearance points.
That sounds like that's it! I plan to race with this motor so would it hurt the cam or anything? by 5,500 rpm my motor is done making power, I have about 50 psi of oil pressure at 3,000 rpm so it gets plenty of oil
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Old 07-14-2019, 04:07 PM
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The filter In my 94 Silverado with a 355 mounts horizontally...lol maybe I've been using the wrong filter🙈
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Old 07-14-2019, 06:54 PM
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Quote:
Originally Posted by Walker.dean View Post
That sounds like that's it! I plan to race with this motor so would it hurt the cam or anything? by 5,500 rpm my motor is done making power, I have about 50 psi of oil pressure at 3,000 rpm so it gets plenty of oil
Won't hurt anything...the lifter bleeds down overnight, ticks when started in the morning and gets refilled with oil in those first few seconds the engine is running. After that happens, it is just like any other lifter in operation.
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Old 07-14-2019, 06:56 PM
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A 1994 Chevrolet 6.5L Silverado Turbo Diesel must use a oil filter with a anti drain back valve in order to prevent turbo dry starts. WIX 51060 is the best one. .
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