Engine Knock
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Junior User
Joined: Jul 1999
Posts: 89
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From: Nashville USA
Engine Knock
This after noon after i got off work i started my truck to notice a very loud knock. i tryed to pin point it and it seams to be coming from both banks. Its a 1979 F-100 w/302 & C-4. then after i got on to the road and hit about 30 mph the knock stoped. then when i got home and let it idle like when i started it it didnt do it. Are the engine bearings gone? And i have one more question does any one know the difference between a car C-4 & a truck C-4? all help will be greatly apreciated.
BigRebel (aka.Mike)
1979 F-100 w/302 & C-4
Icq#1753451
<a href="http://www.geocities.com/Baja/Canyon/2016">http://www.geocities.com/Baja/Canyon/2016</a>
BigRebel (aka.Mike)
1979 F-100 w/302 & C-4
Icq#1753451
<a href="http://www.geocities.com/Baja/Canyon/2016">http://www.geocities.com/Baja/Canyon/2016</a>
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Engine Knock
Hey Biggie, is sounds like you've reved that thing one time too many, trying to pass all them boties.
I don't believe that there is any difference in the tranny.
Pour two cans of STP in and pounce on another chevy.
John
I don't believe that there is any difference in the tranny.
Pour two cans of STP in and pounce on another chevy.
John
Thread Starter
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Junior User
Joined: Jul 1999
Posts: 89
Likes: 0
From: Nashville USA
Engine Knock
hahaha Really funny
I wasnt trying to pass boties, i was.
but why is it knocking are the engine bearings gone? could it be a lifter what? i really need to know so i dont do any more damage than i need to. oh the only reason i rev it is to show of the roar of the engine.
BigRebel (aka.Mike)
1979 F-100 w/302 & C-4
Icq#1753451
<a href="http://www.geocities.com/Baja/Canyon/2016">http://www.geocities.com/Baja/Canyon/2016</a>
I wasnt trying to pass boties, i was.
but why is it knocking are the engine bearings gone? could it be a lifter what? i really need to know so i dont do any more damage than i need to. oh the only reason i rev it is to show of the roar of the engine.
BigRebel (aka.Mike)
1979 F-100 w/302 & C-4
Icq#1753451
<a href="http://www.geocities.com/Baja/Canyon/2016">http://www.geocities.com/Baja/Canyon/2016</a>
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Engine Knock
<center><font size="1" color="#ff0000">LAST EDITED ON Jul-21-99 AT 11:01 AM (EST)</font></center>
AKA, I really don't have a good answer, for you. I was hoping that someone else had the answer that you need.
I am more of a parts swapper.
AKA, I really don't have a good answer, for you. I was hoping that someone else had the answer that you need.
I am more of a parts swapper.
Senior User
Joined: Jul 1999
Posts: 154
Likes: 0
From: Relocated to San Diego CA
Engine Knock
So basically, once the engine is warm, the ticking stops right.
I know that this sometime occurs with the big blocks, does it sound like it backfires a little? If so then I think it is just a valve.
But if you want, you can pull out the engine and take off the oil pan, inspect the bearing and crank, and rebuild it, then you can get past those boties.
I know that this sometime occurs with the big blocks, does it sound like it backfires a little? If so then I think it is just a valve.
But if you want, you can pull out the engine and take off the oil pan, inspect the bearing and crank, and rebuild it, then you can get past those boties.
New User
Joined: Jul 1999
Posts: 2
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Engine Knock
Okay, I see all the experts have you pooring in goop, rebuilding the engine, hey why not take up underwater basket weaving too?
Anyway, when you say it had a "really loud knock comming from both banks". Define "both banks", and was it a knock, a hollow metalic thunking, or a clicking more like small metalick nosies?
If you heard a knock, that is a hollow metalic thunking, from the uper end of the engine, you could have cam bearing troubles.
Does the dip stick have any metal fillings on the end of it floating in the oil?
Has it done it again after it cooled down?
If the answer is yes to any of these you better take it into a shop you trust and get a "real mechanics" opinion.
Any time you hear a knocking sound, you have metal hitting metal that isnt supposed to do this. If the oil on the dipstick has a lot of metal fillings in it, the chance of a bearing somewere being bad is very high.
Hope this helps .... if not, well ... buy some goop, get the engine rebuilding book out, and find some basket lasses!
Ed
Anyway, when you say it had a "really loud knock comming from both banks". Define "both banks", and was it a knock, a hollow metalic thunking, or a clicking more like small metalick nosies?
If you heard a knock, that is a hollow metalic thunking, from the uper end of the engine, you could have cam bearing troubles.
Does the dip stick have any metal fillings on the end of it floating in the oil?
Has it done it again after it cooled down?
If the answer is yes to any of these you better take it into a shop you trust and get a "real mechanics" opinion.
Any time you hear a knocking sound, you have metal hitting metal that isnt supposed to do this. If the oil on the dipstick has a lot of metal fillings in it, the chance of a bearing somewere being bad is very high.
Hope this helps .... if not, well ... buy some goop, get the engine rebuilding book out, and find some basket lasses!
Ed
New User
Joined: Jul 1999
Posts: 2
Likes: 0
Engine Knock
My dad left me a 74 E-100 Van when he passed away. I drove it for three or four years, then it ate its timeing gears and chain, along with a valve and a piston.
I was thinking about just dumping the old 302, and rebuilding a 351W for it.
Has anoyone got any ideas about the cooloing ability of the Econoline with a hot running 351?
It is a 3 on the tree, but I want to pull the old cast iron, and replace it with a C4, with some minor modifications, shift kit, high stall tourq converter, and cooling kit.
I thought about an electric fan in addition to the stock clutch fan on the 351. But I am worried about the confined area of the 74 Eonoline engine area.
Any ideas or coments are welcome.
Thanks,
Ed
I was thinking about just dumping the old 302, and rebuilding a 351W for it.
Has anoyone got any ideas about the cooloing ability of the Econoline with a hot running 351?
It is a 3 on the tree, but I want to pull the old cast iron, and replace it with a C4, with some minor modifications, shift kit, high stall tourq converter, and cooling kit.
I thought about an electric fan in addition to the stock clutch fan on the 351. But I am worried about the confined area of the 74 Eonoline engine area.
Any ideas or coments are welcome.
Thanks,
Ed
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Senior User
Joined: Jun 1999
Posts: 366
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From: saramento usa
Engine Knock
If it went away after a little time, then I would say that the culprit is indeed your lifters. However, that's the first thing a lot of people blame when the old truck starts to tick. It also could be some other component of the drive train and even possibly a spun bearing or timing chain slop. Another place to look is the front accessories such as your power steering pump, altenator, or A/C. Remove one belt at a time until the ticking stops to isolate this type of problem. Could possibly even be some type of vacuum leak. Best bet is to get a mechanic to listen to it, but he will just be guessing at the diagnosis anyway.
Good luck,
Slik
Good luck,
Slik
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Senior User
Joined: Jun 1999
Posts: 366
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From: saramento usa
Engine Knock
I would think the 351W would cool as easily as the 302. (the blocks are very similar). You could always purchase a heavy duty radiator if you really have any problems.
Good luck,
Slik
Good luck,
Slik
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