Subject	cylinders #5 & #6 suffer the most on the VG30DETT
Posted by	TTkeeper on March 27, 2010 at 12:56 AM
	This message has been viewed 509 times.
In Reply To	What all can be wrong? posted by toykoz32 on March 26, 2010 at 10:07 PM
Message	Due to casting flash in the water galleys causing a lack of cooling, cylinders 5 & 6 (rear-most cylinders) are the most prone to detonation in the VG30DETT engine. The casting flash is so bad on some engines that the main water gallery in the vee of the engine is almost completely obstructed by the flash towards the rear of the block. This is due to core shift and the way the sand mold for the block is filled during production. It could happen again, so it would be best to have the block's central water passage ported and deburred when the motor is being rebuilt.
Follow Ups	What all can be wrong? - toykoz32 22:07:26 03/26/10 could be a few things - Figifister 22:17:42 03/26/10 First --> Technical thread. 2nd -->>> - draker 22:30:32 03/26/10 Re: First --> Technical thread. 2nd -->>> - toykoz32 22:42:07 03/26/10 Compression test was done. (n/m) - toykoz32 22:37:52 03/26/10 What's with that #6 Plug ? - ttz'in (NorCal) 22:37:52 03/26/10 I went back out and look, It's the Picture (n/m) - toykoz32 22:43:42 03/26/10 Re: I went back out and look, It's the Picture - ttz'in (NorCal) 22:51:31 03/26/10 Re: Re: I went back out and look, It's the Picture - toykoz32 22:55:28 03/26/10 Cool, Post Up What You find (n/m) - ttz'in (NorCal) 23:03:02 03/26/10 Re: What all can be wrong? - jmalcolm710 22:49:43 03/26/10 melted a piston (n/m) - canyoncarver 23:13:18 03/26/10 This is the correct answer -- hole in piston (n/m) - NytWolf 23:30:41 03/26/10 I wonder if the headgasket was blown before the smoking? - toykoz32 01:28:55 03/27/10 I had a pin-hole in a piston once, (87 Supra), and it made - zellamay 09:10:26 03/27/10 that looks all bad man.... all bad.. (n/m) - Halo Z 23:25:03 03/26/10 cylinders #5 & #6 suffer the most on the VG30DETT - TTkeeper 00:56:23 03/27/10 I was just reading about that. I know its bad but damn. - toykoz32 01:09:27 03/27/10 whoa whoa whoa, test pipes on a street car?! - inf 04:53:44 03/27/10 care to elaborate how the pcv reroute is a bad idea? (n/m) - LJZTT 22:18:22 03/27/10 Re: care to elaborate how the pcv reroute is a bad idea? - WazTTed 23:45:31 03/29/10 Possible broken ring/ring land. (n/m) - zoom 19:15:24 03/28/10
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