| [ Total Views: 885 | Total Replies: 23 | Thread Id: 77691 ] |
|
|
 jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 8th, 2009 at 08:57 PM |
|
|
Does this sound familiar to anyone?
For those gurus who have a good ear for impending disaster, please have a listen to this and let me know your thoughts!
Link to my noisy little engine
The engine was bought with a fairly untidy 71 Super/Baja project. We were told that the engine had been running, but had been stripped of its carby
and electrics that went onto another project.
After it came home the heads were removed, inspected and cleaned up, along with the pots and pistons. All of that looked good apart from a stripped
thread on a camshaft bolt. I didn't look any deeper, after all, the engine was fine, right?
After we got the engine running it developed an ominous "clack! clack! clack!" sound to it, building up gradually from an intermittent to a constant
over about two to three minutes. I originally thought it was in the tinware (perhaps a rattly fan) it resonated so much. That cause was eliminated
before we pulled the clutch out and tried again - same deal.
Has anyone heard this before? I understand that a shot crankshaft bearing gives a dull thud sound. The heads will come off next, and if they're ok
I'll go deeper towards the core.
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
Joel
Scirocco Rare
Now containing 100% E-Wang
Posts: 9368
Threads: 211
Registered: February 14th, 2006
Member Is Offline
Location: Northern Rivers NSW
Theme: UltimaBB Pro Purple
Mood: Tact Level 0.00
|
| posted on July 8th, 2009 at 09:35 PM |
|
|
what have you set the valve gaps to?
|
|
|
cb john
Wolfsburg Wizard
Posts: 470
Threads: 6
Registered: June 22nd, 2007
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue
|
| posted on July 8th, 2009 at 09:38 PM |
|
|
I was just about to say, it's a tappet noise...
|
|
|
eraser
Fahrvergnugen
Posts: 970
Threads: 128
Registered: March 11th, 2005
Member Is Offline
Location: Adelaide
Theme: UltimaBB Pro Powder
|
| posted on July 8th, 2009 at 09:52 PM |
|
|
ow ow ow ow
|
|
|
jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 8th, 2009 at 10:18 PM |
|
|
Yeah, the video probably doesn't give the right kind of noise. It sounds a little more like hitting the fan housing with a ball pein hammer.
I haven't suspected tappets, not only because (to my ears) it doesn't sound like tappet noise, but because it started out really inconsistently.
For the record, they were set at .004", but after reading the Gregory's (probably should have done that before now) it appears that my procedure
differs from what they recommend.
Maybe I'll check them again - I'm really at a loss and don't want to have to do a full pull down.
Hmmmmmmm.....
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 9th, 2009 at 12:18 AM |
|
|
Checked clearances. They're all good.
I cranked it over again and winced at the noise once again.
"Ow, ow, ow" you say - yeah, I have to agree!
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on July 9th, 2009 at 05:48 AM |
|
|
That does sound valve train (or t least top end) related in the video,
but either way you will have to start pulling down the engine till you find it....no washers fell into the ports?
How did you fix the stripped thread without getting shavings inside?
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
 vw54
Super Administrator
Always Waiting 4 Friday
Posts: 16723
Threads: 378
Registered: August 26th, 2002
Member Is Offline
Location: Sunny Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Oval resto ongoing
|
| posted on July 9th, 2009 at 07:36 AM |
|
|
the tappets should be 0.006"
|
|
|
greedy53
Bishop of Volkswagenism
Posts: 3062
Threads: 468
Registered: March 4th, 2006
Member Is Offline
Location: camden nsw 2570
Theme: UltimaBB Pro Grey
Mood: strung out
|
| posted on July 9th, 2009 at 04:50 PM |
|
|
if you would like a set of engines that sound the same i'm the man ,mine had a rag in the fan really scrwed the little bliter
|
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on July 9th, 2009 at 05:13 PM |
|
|
Busted wavy washer or clip letting a rocker arm have way too much sideplay perhaps ???
Other than that I'd be thinking something small bouncin around inside one of the combustion chambers.
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
1916baja
Custom Title Time!
Posts: 1990
Threads: 176
Registered: September 20th, 2007
Member Is Offline
Location: Brisbane - Mt Gravatt
Theme: UltimaBB Pro Blue ( Default )
|
| posted on July 9th, 2009 at 06:40 PM |
|
|
Does it have an aftermarket chrome alt/generator stand? I had one once and it actually put the fan on a slightly odd angle and made it foul with the
fan shroud.... try moving the generator when it is running. Just put a bit of downward pressure on it i mean. Also i think part of the problem there
was the wrong fan fitted to the generator. dunno if it will help but it made a similar noise.
|
|
|
Special Air Service
Custom Title Time!
Chief "Gunna"
Posts: 1769
Threads: 210
Registered: October 4th, 2004
Member Is Offline
Location: Old Bar , Mid North Coast , NSW
Theme: UltimaBB Pro Blue ( Default )
Mood: In desperate need of a decent sleep
|
| posted on July 9th, 2009 at 08:28 PM |
|
|
to eliminate the fan as a problem take the fan belt off. Start the engine, if the niose aint there anymore then you know it was the fan/generator. If
its still there then its internal.
Cheers Brendan
[size=5] Calling all NSW Mid North Coast Veedubbers
Click Below [/size]
[size=6]Mid North
Coast VW [/size] |
|
|
1916baja
Custom Title Time!
Posts: 1990
Threads: 176
Registered: September 20th, 2007
Member Is Offline
Location: Brisbane - Mt Gravatt
Theme: UltimaBB Pro Blue ( Default )
|
| posted on July 9th, 2009 at 09:06 PM |
|
|
Good point...
|
|
|
Thinker
Seriously Crusin Dubber
Posts: 162
Threads: 26
Registered: October 13th, 2008
Member Is Offline
Location: Narellan
Theme: UltimaBB Streamlined2
Mood: Contemplating
|
| posted on July 9th, 2009 at 09:18 PM |
|
|
i've the same thing but not that loud when i start up its quite and in a couple of mins its tap tap tap and it turned out to worn valve guides. but
with a sound like that i would be looking for dent in your rocker covers. are all the adjusting screws sticking out the same amount or is there one
screw right out and as it opens a valve it hits the rocker cover.
good luck
|
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on July 10th, 2009 at 08:31 AM |
|
|
Also, if it's something top end related it'll be louder on one side of the engine than the other... assuming it's only one top end that has
problems of course.
Just watched the vid again, and at the end when the engine is shutdown the noise seems to stop before the engine's actually stopped spinning...
weird...
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 11th, 2009 at 07:33 PM |
|
|
Update:
Just had another REALLY good look and found one of the long studs (that hold the heads on) was not fully screwed in, and was fouling on the No. 4
exhaust rocker.
We had a eureka moment, screwed it home, replaced the valve rack, started the engine and....no change. 
So:
We know it's not the fan (ran the engine with belt removed).
We know it's not tappets (checked, rechecked, readjusted, checked, rechecked).
We know it's not clutch/gearbox related (clutch is removed).
We know it's coming from the No 3/4 side (leaning towards 4).
We know our patience is wearing thin...
Tomorrow - 3/4/ head off for a look inside the pots.
Thanks for all your thoughts! We'll keep you posted!
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
cb john
Wolfsburg Wizard
Posts: 470
Threads: 6
Registered: June 22nd, 2007
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue
|
| posted on July 11th, 2009 at 08:32 PM |
|
|
the thread could be pulled out , check that stud again...
|
|
|
bushed
Wolfsburg Elder
Posts: 3541
Threads: 66
Registered: December 18th, 2006
Member Is Offline
Location: Lowood Qld
Theme: UltimaBB Pro Blue ( Default )
|
| posted on July 11th, 2009 at 09:12 PM |
|
|
I say u may have dropped a tinware screw dwn the port nr 4 at some time during assembly and it is banging on the top of piston nr 4
(done it myself)
only once...nevva again!
want any vw bits old but like me, Made in Germany!!!
|
|
|
bushed
Wolfsburg Elder
Posts: 3541
Threads: 66
Registered: December 18th, 2006
Member Is Offline
Location: Lowood Qld
Theme: UltimaBB Pro Blue ( Default )
|
| posted on July 11th, 2009 at 09:14 PM |
|
|
what is the woodpecker eatin in that funny chrome cage around the fanbelt???
let him out! the noise will stop. lol
want any vw bits old but like me, Made in Germany!!!
|
|
|
grumble
Son of Jim - Creator of Good
Posts: 2671
Threads: 53
Registered: June 10th, 2008
Member Is Offline
Location: Taree
Theme: UltimaBB Pro Blue ( Default )
Mood: happy all the time
|
| posted on July 11th, 2009 at 09:40 PM |
|
|
Are the pistons on the right way ie arrow to the flywheel,if they are back to front it will sound like a very noisy tappet. Try taking the plug leads
off one at a time and this will also eliminate piston slap.(use chicken pliers when removing High tension leads with engine going)
|
|
|
jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 12th, 2009 at 07:47 PM |
|
|
Okay, so we've got the 3/4 head off. Checked it out - all looks okay. Cylinder walls all look good too.
So next we pull off No. 4 pot and give the piston a wriggle. There must have been 3 mm of movement between the conrod and crankshaft, so I imagine
that somewhere in the sump are the remains of a big end bearing.
At this point we've decided to take it to a workshop for repair. All learning I guess, but I never imagined that a big end could be so loud.
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
type3lover
A.k.a.: The Smashed Repairer
Insano Dub Head
in the garage...
Posts: 796
Threads: 90
Registered: February 2nd, 2005
Member Is Offline
Location: Adelaide
Theme: UltimaBB Pro Blue ( Default )
Mood: stoked
|
| posted on July 12th, 2009 at 08:23 PM |
|
|
G'day mate. I've been watching this thread - sorry to read about your grief...
That's a rod bearing all right! I imagined more of a clack than a click though!
Glad you found the prob, but sorry that it means at least a machined crank and reco rods...unless it did a lot of damage.
Good that everything else is good...smile :-)
Being a Vw it would have gotten you to your destination regardless....
.
|
|
|
jamsha71
Slammed & Awesome Dubber
Posts: 88
Threads: 28
Registered: October 13th, 2008
Member Is Offline
Location: Western Suburbs, Brisbane
Theme: UltimaBB Pro Black
|
| posted on July 12th, 2009 at 08:35 PM |
|
|
Yeah it actually was a clack rather than a click The sound through the
video camera didn't quite match it.
Thanks for your thoughts. It is actually kinda good to know what the problem is!
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
|
|
|
bushed
Wolfsburg Elder
Posts: 3541
Threads: 66
Registered: December 18th, 2006
Member Is Offline
Location: Lowood Qld
Theme: UltimaBB Pro Blue ( Default )
|
| posted on July 12th, 2009 at 09:16 PM |
|
|
knowin the prob is half the ansa
fixing it and how to is the other 50%
cheers all.
want any vw bits old but like me, Made in Germany!!!
|
|
|
