Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   Gen VI 489 +20 build (https://www.offshoreonly.com/forums/general-q/343678-gen-vi-489-20-build.html)

SB 01-04-2017 07:52 PM

Industrial/agricultual; pumps. generators, etc.....big market

There is a 632 (10.2L) out there with piston oilers and etc. Cool !

SB 01-04-2017 08:02 PM


Originally Posted by mike tkach (Post 4516102)
what was the price tag on it,looks interesting.

http://www.jegs.com/i/Chevrolet-Perf...28586/10002/-1

http://paceperformance.com/i-1999064...te-engine.html

MILD THUNDER 01-04-2017 09:39 PM


Originally Posted by HawkX66 (Post 4516125)
There are a few different versions. Mine had these heads. P/N: 19256821 2.06"/1.72" valves.

https://c5.staticflickr.com/1/298/30...f683cbbb_z.jpg


Here's the new heads:

https://c8.staticflickr.com/1/723/31...67bd4b2c_z.jpg

https://c7.staticflickr.com/1/589/31...00d2f198_z.jpg

Hard to tell on my phone, but man, that looks like some big ridges around the valves. I would think that would really kill airflow and create some hotspots

getrdunn 01-04-2017 09:45 PM


Originally Posted by MILD THUNDER (Post 4516221)
Hard to tell on my phone, but man, that looks like some big ridges around the valves. I would think that would really kill airflow and create some hotspots

Could use some chamber work for sure. About 3-4 cc's worth but I'm sure it will run well.

HawkX66 01-05-2017 07:52 AM


Originally Posted by MILD THUNDER (Post 4516221)
Hard to tell on my phone, but man, that looks like some big ridges around the valves. I would think that would really kill airflow and create some hotspots


Originally Posted by getrdunn (Post 4516226)
Could use some chamber work for sure. About 3-4 cc's worth but I'm sure it will run well.

Those pics were the heads before they had the work done. They'll definitely get some smoothing out.

So just to be sure, there's no way to block off the extra coolant passage on the Gen VI without the Gen VI gasket and it is necessary? I just want to make sure there wasn't any confusion with all the Mk IV vs Gen VI talk.

Lee 01-05-2017 04:26 PM

Great looking Camaro!!

HawkX66 01-09-2017 07:05 AM

I got my heads back this weekend and the coolant pouring up into the intake theory with Mk IV gaskets on a Gen 6 block doesn't work... The coolant passages in the head are connected. Can anyone else explain why you wouldn't want to run Mk IV gaskets on a Gen 6? I just don't see it. The only difference is the extra passage isn't machined on the block.

https://c3.staticflickr.com/1/384/31...6b833af6_k.jpg

https://c7.staticflickr.com/1/421/30...ba3d3c9c_k.jpg

Here's what my bowls look like now. It doesn't look like there is any real shrouding going on. I might still smooth them out a little and polish them. We'll see.

https://c3.staticflickr.com/1/595/31...a8cc6185_k.jpg


Again, thanks for any help.

snapmorgan 01-09-2017 09:38 AM

Have you checked Cometic's website for the correct gaskets? They have a great selection for the gen 6 blocks. No need to chance it if the correct gasket is readily available

HawkX66 01-09-2017 01:10 PM


Originally Posted by snapmorgan (Post 4517599)
Have you checked Cometic's website for the correct gaskets? They have a great selection for the gen 6 blocks. No need to chance it if the correct gasket is readily available

I'll check them out. I was looking at Jegs and Summit. Still, looking at it, it doesn't look like it's an issue. Thanks.

MILD THUNDER 01-09-2017 01:24 PM

1 Attachment(s)
...


All times are GMT -5. The time now is 02:04 PM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.