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1998 eldorado, 2000 Catera
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247 Posts
Discussion Starter · #1 ·
I CAN NOT LIVE WITH THIS TAPPING NOISE ANYMORE!!!

I need a fix. Don't care about cost. Engine runs perfect. What should I do? It's embarrassing sitting at a stop light with a nice eldo and all u hear is the engine tapping.
 

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Administrator
2002 F55 STS, 2014 Explorer XLT, F-150s
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74,618 Posts
Could be anything from a cat stuck in the accessory drive to a crankshaft that's ready to fall out the bottom of the oil pan.

Could you be a bit more specific as to "tapping" ???
 

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1998 eldorado, 2000 Catera
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247 Posts
Discussion Starter · #3 ·
A Tap at cold start and then on and of during driving. It's loud at the bottom of engine. I'm thinking exhaust cams. I really need this fixed.also a puff if smoke(oil) when taking off every do often.
 

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1999 Eldorado ETC coupe.
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438 Posts
Most likely a carbon knock or possibly a collapsed piston skirt as worse case scenario.
I've owned many Northstar's cold knock..

.
 

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Registered
1998 eldorado, 2000 Catera
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247 Posts
Discussion Starter · #5 ·
Bad thing about it, it's only been 3yrs since rebuild. And has been tapping since. I do WOT and I've used rotella, with no good result. So should I get another engine rebuilt or what. Just looking for insight before I make a decision. Thanks
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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21,281 Posts
I CAN NOT LIVE WITH THIS TAPPING NOISE ANYMORE!!!

I need a fix. Don't care about cost. Engine runs perfect. What should I do? It's embarrassing sitting at a stop light with a nice eldo and all u hear is the engine tapping.
===================================
take it to MIDWEST CADILLAC REPAIR in Palatine -
Joe Blau (847) 776-1234 -
 

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Registered
1998 eldorado, 2000 Catera
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247 Posts
Discussion Starter · #10 ·
He found one bad exhaust cam on top but didn't remove the engine. Replaced that one but it's still tapping. I meant intake ranger sorry.
 

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4,183 Posts
All cams are at the top of the engine. It would be helpful for us to diagnose if you could post a video of the noise you are describing.
 

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Administrator
2002 F55 STS, 2014 Explorer XLT, F-150s
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74,618 Posts
That tap (in the video) sounds suspiciously like a worn out cam follower/cam lobe.

How many miles on that (flat tappet) engine ? .............
 

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Registered
1998 eldorado, 2000 Catera
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247 Posts
Discussion Starter · #18 ·
180,000, car has been sitting for about a year , haven't had a chance to clean and spray it down with arm oral yet.

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98Geldog said:
180,000, car has been sitting for about a year , haven't had a chance to clean and spray it down with arm oral yet.
And the buzzing noise the PVC valve does I can't figure out either.
 

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Administrator
2002 F55 STS, 2014 Explorer XLT, F-150s
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Clean the PCV with choke cleaner spray and blow it dry. Check the dirty air (manifold vacuum) line and connectors/elbows for leaks. If the valve continues to whistle or whine, get a new one. $2.50. Engine specific, so look it up in the parts guide that hangs on the oil/air filter/PCV shelves.
 
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