Where's this tap coming from
Thread Starter
Teching In
Joined: Jan 2017
Posts: 46
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From: Mississippi
Where's this tap coming from Just bought my first 4th gen engine was blown so I replaced it with a 5.3 noticed a very very very light tap after install on topside of engine thought it was because the motor hadn't been run for awhile and it got worse beings I've dealt with plenty of 5.3s I figured lifter put a whole new set in noise still there figured I may have got a bad lifter from the parts store so I tore it down again and replaced any that seemed questionable but still there and it's driving me crazy I've tried disconnecting coils one by one to see if it's a rod makes no difference only change I've noticed is if I disconnect the #2 injector the sounds still there but slightly less loud it also quiets down after engine gets up to temp at idle but starts getting loud again at anything over 2000rpms and especially loud on deceleration car doesn't seem sluggish or even like it's missing and has no codes just a slightly rough idle anybody got any suggestions right now I'm thinking of doing a complete overhaul but really want it ready for scraping the coast in june
TECH Addict
Joined: Mar 2013
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Might be the oring on the pickup tube leaking air into the oil stream. Will cause lifter tapping AND is quite common if the engine is over 5 years old. I'd try adding a seal sweller like TransX 1st and see if it remedies it.
TECH Addict
Joined: Mar 2013
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Try what told you 1st, if it fixes it I'd let it alone. Plus you'll know if that's the problem. Mine has been fine for 60k since I used the TransX.
If you can get the oil pan off I'm sure you could change it but I seriously doubt it without lifting the engine sky high. Probably easier to buy a puller, flywheel holding tool and a balancer installer and take the frt cover off. You will still need to drop the oil pan some even that way.
If you can get the oil pan off I'm sure you could change it but I seriously doubt it without lifting the engine sky high. Probably easier to buy a puller, flywheel holding tool and a balancer installer and take the frt cover off. You will still need to drop the oil pan some even that way.
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Brett Foote Thread Starter
Teching In
Joined: Jan 2017
Posts: 46
Likes: 1
From: Mississippi
Replaced the o ring and its still tapping this is so frustrating been wanting one of these cars for a while and now that i finally got it its been a headache anybody got suggestions on where to get a 5.3 rebuild kit
TECH Addict
Joined: Mar 2013
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Did you check the oil for air bubbles? Did you use the right oring? Did you install it on the pickup tube then install the tube into the pump?