Cold Engine Knock
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Freshman User
Joined: Aug 2005
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From: Barrie, Ontario
Cold Engine Knock
So just like my 00, and 03 with the 5.4, as the weather gets colder in the morning, the first start of the day causes this awful knocking sound that goes away with thirty seconds of warm up.
Are all the 5.4's like this in the cold, and any ideas on what's going on.
Doesn't sound good; makes me glad it's on a lease.
Rick
Are all the 5.4's like this in the cold, and any ideas on what's going on.
Doesn't sound good; makes me glad it's on a lease.
Rick
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Freshman User
Joined: Aug 2005
Posts: 36
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From: Barrie, Ontario
Originally Posted by ford390gashog
is this a real knock or the known dry start clatter becuase of no oil in the filter? the clatter is well known. thats why a special filter is made for these .
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From: CSofA
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
good point about the oil. i just assume it would be 5w20 but you never know. also a poor filter will do this.
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From: "Islander"
ford390gashog, the pre-oiler is so easy to operate the wife has it on her (my) Rover Discovery. On the dash is a red/green LED and a small NO push switch, push button and LED goes from green to red, about 8 seconds later back to green then start. This allows for 5 seconds of pressurized oil after the air has been displaced in the oil galleries.
.....=o&o>.....
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Joined: Aug 2004
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From: Richmond,VA
I don't know from your description if it is the same noise, but my 02 Avalanche did the same thing on a cold start. It is in GM's case "piston slap" due to the design of the aluminum pistons. GM will not fix the problem, and I got tired of it and sold the truck (great truck otherwise) and bought the F150. Mine is the 4.6, but haven't noticed it so far, but I only have 3500 miles. If this one does the same thing, and Ford won't fix it, it is history and my next truck will be a Toyota Tundra or Nissan Titan. I hope not to have to do this as it pains me to buy more and more non American vehicles (I admit to owning a Prius which is great), but American quality is still lagging and my patience is getting shorter.
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Try a bottle of Prolong (or other oil additive). I had a 90 ranger with the same problem. I tried many things to get rid of the "knock", but the oil additive took care of the problem. I haven't had the problem in my new 150, but I live in ND so I'll see what happens with this engine.
Logistics Pro
Joined: Mar 2002
Posts: 3,881
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From: Wake Forest, NC
The cold engine knock noise is what I would consider normal. Some brand of engines you hear it more than others. What is special about being below 40 or so I don't know, but it definitely is then case in many different vehicles (i've owned plenty). My 5.4 2000 F-150 had it. After working at a dealer, plenty of the trucks on the lot have done it too. It is up to you but it has to do with the silicon content of the pistons and how much they expand when they warm up. If you think the 5.4 is bad, you should hear a vehicle with forged pistons on a cold day.
Post Fiend
Joined: Jan 2002
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From: USA
GO down to the 5.4 engine forum.A sticky at the top tells the story.
we have trucks running with over 120,000 miles with cold engine start up knock.
The deal is use proper oil filters change your oil way before Ford recommends.
If rattling or knock persist for more that 2-3 minutes take it back to the dealer.
Guys liviing in warmer climates usually don't have a persistant problem.
Rich
we have trucks running with over 120,000 miles with cold engine start up knock.
The deal is use proper oil filters change your oil way before Ford recommends.
If rattling or knock persist for more that 2-3 minutes take it back to the dealer.
Guys liviing in warmer climates usually don't have a persistant problem.
Rich
Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
Originally Posted by gemelke
Try a bottle of Prolong (or other oil additive). I had a 90 ranger with the same problem. I tried many things to get rid of the "knock", but the oil additive took care of the problem. I haven't had the problem in my new 150, but I live in ND so I'll see what happens with this engine.
well considering prolong is made with chlorine and used oil i would not even use that crap in a mower. prolong increases wear. just look at tests done with it.