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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Mon Apr 01, 2013 11:25 am Post subject: Cracked a cylinder - too much boost |
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Well I learned my lesson..
Engine was only ran for a couple miles after the blowout to get it home.
I know the cylinder is junk, but are the rings ok to run? I haven't inspected them yet..
I'm currently trying to source a new cylinder, but it looks like I'm gonna have to buy a full set since I can't seem to find anyone selling them individually. Should I go ahead and get new rings?
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Tramsdisciple Samba Member
Joined: May 24, 2009 Posts: 109 Location: Cottage Grove, Oregon
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Posted: Mon Apr 01, 2013 1:39 pm Post subject: |
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Yes get new rings and also look closely at the ring lands. I pup 100 low lead in my turbo and it cracked 2 barrels and the ring land on one piston. Do yourself a favor and get new again and use more octane or less boost. Boost is addictive so better just run race gas. _________________ 63 turbo ragtop bug
http://www.thesamba.com/vw/forum/viewtopic.php?t=545985
03 passat
67 sunroof squareback
71 bay daycamper
69 squareback fi a/c
04 toureg v8 |
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Vee Dub Nut Samba Member
Joined: April 25, 2004 Posts: 1184 Location: Dallas, GA
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Posted: Mon Apr 01, 2013 4:46 pm Post subject: |
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Curious.. How much boost and what brand jug? Run lean, detonate? _________________ Fightin' Texas Aggie Class of 2006
67 Beetle (TBD)
74 Transporter (EJ25 Swapped) - Build Thread: https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0
See all my VW pics on Instagram @ vee_dub_nut |
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white/red_68 Samba Member
Joined: October 13, 2008 Posts: 207 Location: Kissimmee
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Posted: Mon Apr 01, 2013 5:39 pm Post subject: |
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Get mahle cylinders
New Rings....
Check your Mixture..... _________________ You can go fast but, I am faster! |
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white/red_68 Samba Member
Joined: October 13, 2008 Posts: 207 Location: Kissimmee
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Posted: Mon Apr 01, 2013 5:39 pm Post subject: |
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Get mahle cylinders
New Rings....
Check your Mixture..... _________________ You can go fast but, I am faster! |
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modok Samba Member
Joined: October 30, 2009 Posts: 26790 Location: Colorado Springs
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Posted: Mon Apr 01, 2013 5:57 pm Post subject: |
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what size cylinder? |
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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Mon Apr 01, 2013 5:59 pm Post subject: |
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94mm Mahle
I wasn't data logging, so I'm guessing 25-30 psi |
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modok Samba Member
Joined: October 30, 2009 Posts: 26790 Location: Colorado Springs
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Posted: Mon Apr 01, 2013 6:11 pm Post subject: |
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Looks like you can get the AA brand cylinders for about 130$
Mahle is getting scarce, especially in that size |
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veedubcrazy Samba Member
Joined: February 14, 2005 Posts: 2130 Location: La Porte, Tx.
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Posted: Mon Apr 01, 2013 6:23 pm Post subject: |
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I *think* I have a set of 94mm barrels in the back shed just sitting in the box. I needed long barrels for my 2387 and the stock ones just got put up. Lemme go check... If they check out, you can have them. Hang on... _________________ 1967 Deluxe Sedan |
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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Mon Apr 01, 2013 6:24 pm Post subject: |
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veedubcrazy wrote: |
I *think* I have a set of 94mm barrels in the back shed just sitting in the box. I needed long barrels for my 2387 and the stock ones just got put up. Lemme go check... If they check out, you can have them. Hang on... |
Nice!! |
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veedubcrazy Samba Member
Joined: February 14, 2005 Posts: 2130 Location: La Porte, Tx.
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Posted: Mon Apr 01, 2013 6:38 pm Post subject: |
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Okay, look here. The barrels, with no other marking saying are 94mm, measure out to 3 11/16" in the widest spot I can see. They are marked 1 thru 4 and (here is an added bonus and to my surprise) that there are matching pistons rings in the barrels. I have no idea why but they are. The long barrels came in a AA box so I put the other barrels in the box. They are used so the barrels and rings are matched. I have no idea how many miles there are but when the itch took for a 2387, it did not take long. If you want pix, I can do that... _________________ 1967 Deluxe Sedan |
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veedubcrazy Samba Member
Joined: February 14, 2005 Posts: 2130 Location: La Porte, Tx.
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Posted: Mon Apr 01, 2013 7:11 pm Post subject: |
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Sent you pix. If you want them, pay the shipping and viola! I can send them whenever... _________________ 1967 Deluxe Sedan |
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turbo2go Samba Member
Joined: March 01, 2004 Posts: 105 Location: ohio
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Posted: Mon Apr 01, 2013 8:17 pm Post subject: |
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how much deck are you running? _________________ If you can't win,be spectacular! |
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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Tue Apr 02, 2013 9:00 am Post subject: |
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turbo2go wrote: |
how much deck are you running? |
I believe it was around .085" plus I have a .040" copper gasket in there. I'll measure it tonight. I'm guessing that having that much deck makes it more prone to crack? |
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veedubcrazy Samba Member
Joined: February 14, 2005 Posts: 2130 Location: La Porte, Tx.
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Posted: Tue Apr 02, 2013 10:01 am Post subject: |
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Barrels sent... _________________ 1967 Deluxe Sedan |
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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Tue Apr 02, 2013 10:04 am Post subject: |
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veedubcrazy wrote: |
Barrels sent... |
My hero!! |
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veedubcrazy Samba Member
Joined: February 14, 2005 Posts: 2130 Location: La Porte, Tx.
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Posted: Tue Apr 02, 2013 10:07 am Post subject: |
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Hardly. I just dont throw anything away. Pure chance I clicked this thread. Just use them, I could not. _________________ 1967 Deluxe Sedan |
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cdupuy Samba Member
Joined: November 23, 2011 Posts: 157 Location: AZ
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Posted: Tue Apr 02, 2013 5:20 pm Post subject: |
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Think I would keep the deck in the Head not the Cyl. Just Sayen. |
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risk Samba Member
Joined: June 24, 2004 Posts: 710 Location: Stumpbroke, Arkansas
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Posted: Wed Apr 03, 2013 9:20 am Post subject: |
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Pulled the 3-4 side apart last night... #4 was cracked too, almost the entire length of the barrel.
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75smith Samba Member
Joined: July 09, 2011 Posts: 2275 Location: NH
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Posted: Wed Apr 03, 2013 9:24 am Post subject: |
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I would say too much deck; especially with an extra .04 shim-what size is your head CC? _________________ My 1975 Beetle Build Updated 8-21-12
My engine build |
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