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BeetleUy
Samba Member
Joined: February 04, 2013
Posts: 156
Location: Uruguay
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 Posted: Fri Nov 21, 2014 1:29 pm Post subject: |
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Then I don't know what it is
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VW beetle - 1986 - 1600 dp
H30/31 - SVDA
7.9:1 CR |
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BeetleUy
Samba Member
Joined: February 04, 2013
Posts: 156
Location: Uruguay
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| Posted: Thu Nov 27, 2014 5:00 pm Post subject: |
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So according to the noise, is it not from a rod? Is it safe to drive with it?
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VW beetle - 1986 - 1600 dp
H30/31 - SVDA
7.9:1 CR |
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mikedjames
Samba Member
Joined: July 02, 2012
Posts: 2743
Location: Hamble, Hampshire, UK
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| Posted: Fri Nov 28, 2014 12:29 pm Post subject: |
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| jlex wrote: |
Maybe your valve adjusting screw is bad, and the measurement for valve clearance isn't accurate. I had a couple of adjustment screws that went bad because my valve guides were worn. (See pic) When I would measure the clearance, the measurement was off because I was measuring from the high spot on the screw, although the valve stem was actually riding on the low spot. Take out the adjustment screws on that bank and look at them.
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This wear may be because of soft adjusters : about a year ago a batch of soft adjusters appeared in the UK . I had some in my bus engine in fairly new cylinder heads where the rockers just did not line up with the valve stems. The burring I saw ended up with flakes coming off in the engine , if you actually tried to set the gap off the end of the burr, it would flatten and vanish.
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Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
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BeetleUy
Samba Member
Joined: February 04, 2013
Posts: 156
Location: Uruguay
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| Posted: Sat Nov 29, 2014 11:27 am Post subject: |
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I was thinking about a reason for the clicking sound...
Recently ( 2 months ago ) the cylinder heads were machined in order to get the same CR in all the cylinders and to increase the CR to 7.9:1.
From what i remember before that there was no clicking noise.
The clicking noise comes from the 3/4 cylinders side, so two days ago i checked the push rods of that side and realized that the admission valve 3# push rod was bent.
So my theory is that because of the heads machining maybe the admission valve of the 3# cylinder is hitting against the 3# piston producing the noise, that would also explain the bent push rod.
What do you think?
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VW beetle - 1986 - 1600 dp
H30/31 - SVDA
7.9:1 CR |
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Chad M
Samba Member
Joined: July 14, 2003
Posts: 723
Location: Alberta
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| Posted: Sat Nov 29, 2014 1:54 pm Post subject: |
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| Sounds reasonable... do you have access to a bore scope to look down the plug hole and look for evidence of valve to piston contact? |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24759
Location: Olympia Wash Rinse & Repeat
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| Posted: Sat Nov 29, 2014 2:42 pm Post subject: |
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Bore scope or pull that head off for inspection....
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BeetleUy
Samba Member
Joined: February 04, 2013
Posts: 156
Location: Uruguay
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| Posted: Mon Dec 08, 2014 8:47 am Post subject: |
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Im planning to drop the engine and check inside to see if the clearances are ok.
What tool do i need in order to measure all the clearances of the push rod metals, and how do i measure them?
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VW beetle - 1986 - 1600 dp
H30/31 - SVDA
7.9:1 CR |
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vamram 
Samba Member
Joined: March 08, 2012
Posts: 7304
Location: NOVA
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| Posted: Mon Dec 08, 2014 9:15 am Post subject: |
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A bore scope could save you the trouble and they're not super expensive:
http://www.amazon.com/Removeable-Megapixels-interf...01578011_6
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Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!
'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
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Save the Supers!! |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24759
Location: Olympia Wash Rinse & Repeat
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| Posted: Mon Dec 08, 2014 9:16 am Post subject: |
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If any valve has been hitting a piston, then there will be marks on the piston/s.
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emilyfberry
Samba Member
Joined: October 17, 2013
Posts: 28
Location: Nashville, TN
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| Posted: Wed Apr 01, 2015 2:13 pm Post subject: |
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Having this exact problem. Did you ever figure out what the issue was?
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'73 Thing-ish |
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Greezy Joe
Samba Member
Joined: April 12, 2010
Posts: 1534
Location: Crawfordville, Fl
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| Posted: Thu Apr 02, 2015 6:43 am Post subject: |
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| BeetleUy wrote: |
| I will check everything today, but can it also be rocker arm side play? |
Bingo, are you running solid shafts, if not it's good added insurance especially with any kind of performance cam.
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" Duct tape can't fix stupid, but it'll muffle the sound". |
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BeetleUy
Samba Member
Joined: February 04, 2013
Posts: 156
Location: Uruguay
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| Posted: Thu Apr 02, 2015 8:05 am Post subject: |
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Well it doesn't seem to be something that can be fixed from the outside, I couldn't open the motor yet but I will some day
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VW beetle - 1986 - 1600 dp
H30/31 - SVDA
7.9:1 CR |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Thu Apr 02, 2015 9:04 am Post subject: |
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| fix it or else.....the trans can also make noises like this. but pulling a valve cover is easy and lots can be seen from there. also compression check and valve spring check.Ive seen guys revtune motors trying to get the click to go away...the click was the piston rings in the combustion chamber....not on the piston.verry leen condition&overheated badly. |
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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Sat Apr 04, 2015 1:36 pm Post subject: |
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I had a clicking noise that I thought was a rod knock.
Ended up being a washer in one cylinder and the washer in the bolt never made it pass the valve. The clicking was when the washer got stuck in the head, and the piston was hitting the washer. |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24759
Location: Olympia Wash Rinse & Repeat
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| Posted: Sat Apr 04, 2015 2:12 pm Post subject: |
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Hopefully those did not muck up the heads and piston tops too much.
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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Sat Apr 04, 2015 3:29 pm Post subject: |
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| Eric&Barb wrote: |
| Hopefully those did not muck up the heads and piston tops too much. |
It did a little. I drove around without knowing for a month till i heard the noise. I drove it home, about 2 miles, then pulled apart. Put it all back together now runs better than before. |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24759
Location: Olympia Wash Rinse & Repeat
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| Posted: Sat Apr 04, 2015 4:10 pm Post subject: |
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Any sharp edges in the heads will cause hot spots and possibly detonation. Good to hear it is working better!
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