help what is this sound coming from my engine.

hsosa1

60 DC has a stock 1600 DP stock exaust. 30/31 pic carb. Tuesday morning I get into my DC to go to work. its a bit chilly about 50 degrees. Engine warms up I start driving and I hear a weird sound from the engine. The noise sounds like I have a playing card attached to a bike wheel. like a slapping sound and it s more pronounced when i hit the gas. I stopped and looked inside the engine maybe something was hitting the pulley belt. nothing. THere s no loss of power. just that slapping sound also sounds metallic. havent checked the valves yet. I dont think its an exuast leak. any ideas?
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Just Cruzin Sur Califas VW Car Club est♤1998

Euro 67 · Posted: Wed Dec 12, 2007 9:46 pm Post subject:

Rod Knock
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68 Bug totaled one day will live again
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hsosa1 · Posted: Wed Dec 12, 2007 9:52 pm Post subject:

damm so my engine is going kaput soon.. ?
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Just Cruzin Sur Califas VW Car Club est♤1998

SRP1 · Samba Member Joined: January 06, 2007 Posts: 4340

Start with the little things like something stuck in the fan, or Gen/alt bearings, check for a rocker shaft problem like a broken clip. Could this be coming from the bell housing, or something stuck behind the crank pulley?

or as said rod knock? Sad

Hope you find it's a simple thing.

68suprise · Posted: Wed Dec 12, 2007 10:03 pm Post subject:

Oh Oh.. I hat the same problem before. The screw that held the air cleaner on came loose and the nut that held the screw on fell into the motor. I removed the head and there ws a lort of surface damnage to the aluminum but I reassembled and it ran ok...

cbr900racer · Posted: Wed Dec 12, 2007 11:01 pm Post subject:

the way he described it, it's more of a ticking sound, right? Every rod I've heard knocking made more of a dull thud sound.
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71 Bay (1776 in process)
94 Sonoma
98 Suburban (bike hauler)
97 Blazer
07 Nitro
94 CBR900RR (runs 5.70s 1/8 mile)

spudwinkle · Posted: Thu Dec 13, 2007 4:52 am Post subject:

try here

http://home.arcor.de/silke.fokken/sounds/
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nextgen · Posted: Thu Dec 13, 2007 7:19 am Post subject:

Simple tool to isolate the sound. Take a 2 foot piece of rubber hose and put one end on your ear and the other place on different places on the engine and fan housing. Where it is the loudest, that is where the sound is coming from.
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COFBack · Posted: Thu Dec 13, 2007 9:54 am Post subject:

I'll guess exhaust leak or detonation

Tune up, tighten up and check timing.

good luck
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damitboy · Posted: Thu Dec 13, 2007 9:58 am Post subject:

jps1145 · Posted: Thu Dec 13, 2007 10:40 am Post subject:

take the fan belt off and start it back up. if the sound is gone, you've narrowed it to the fan or alt/gen.
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GTMike · Posted: Thu Dec 13, 2007 10:48 am Post subject:

I've had the exact same thing happen to me...
Pull off your fuel pump and take a look at the pushrod.
I'd be willing to bet that its bent. I've gone through two
of them. The bad part is that once they bend, it shatters
the plastic guide, and all the pcs. end up in the bottom
of your case.

-MT

(By the way, I switched to an electric fuel pump.)

nextgen · Posted: Thu Dec 13, 2007 11:41 am Post subject:

Mechanics stethoscope is good for the block, the hose put you in the ball park. Once you narrowed it down the mechanics stethoscope will tell you if it is a connecting rod, tappet or Fuel pump rod.

But if that is what you have fine. But it don't work good on exhaust leaks or fanhouning problems.
_________________
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The TYPE IV UPRIGHT CONVERSION MANUAL
BEETLE MAGNETIC DEFLECTOR SHIELDS
LETS TALK DUBS https://www.youtube.com/results?search_query=joe+cali+ghia https://letstalkdubs.libsyn.com/ep-200-joe-cali-ty...qI3xJTCzjs

GTMike · Posted: Sat Dec 15, 2007 8:52 am Post subject:

any luck?

68suprise · Posted: Sat Dec 15, 2007 10:58 pm Post subject:

I still think it is the nut in the cylinder. It sounds exactly like he described. A buzzing sound like the card in the bike spokes.

hsosa1 · Posted: Mon Jan 21, 2008 9:28 pm Post subject:

THanks im going to check this coming weekend. weathers been bad and ive been rollin my 62vert. will post some updates soon.
_________________
Just Cruzin Sur Califas VW Car Club est♤1998

seabeebuggy · Posted: Mon Jan 21, 2008 10:47 pm Post subject:

Mudcat · Posted: Mon Jan 21, 2008 11:00 pm Post subject:

Weight guessing is one of my favorite past times Laughing

I place my money on the exhaust leak. They have a way of sounding metalic. Rod knock sounds more like a ball ping hammer on a vise than a playing card in a spoke. Thud

Mudcat · Posted: Mon Jan 21, 2008 11:13 pm Post subject:

Sudwinkle,
thanks for that link. First time I've seen that one. Now I've got to learn how to repair a squeaking distributor shaft. Shocked

I heard it for the first time lastnight. Maybe its in John's book.

tandm1999 · Posted: Wed Jan 23, 2008 2:29 pm Post subject: Head

I had a noise like that not too long ago, ended up being a loose head.


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