DOD delete oil passages plugged or open?

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Apr 20, 2020 | 09:49 AM

AS688

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DOD delete oil passages plugged or open?

Should I plug the the oil passages in the valley of carbed DOD delete block? If so what are you using for the plugs?

Apr 20, 2020 | 10:51 AM

TrendSetter

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From: Florida

you can buy a new valley plate that blocks them off. i dont have the part number right now but i just installed one.

Apr 20, 2020 | 02:26 PM

AS688

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Yes, I have a new cover on the way but wondering if I should do more. Saw on another site that it may help oil pressure.

Apr 20, 2020 | 02:43 PM

G Atsma

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From: Central Cal.

Quote:

Originally Posted by AS688

Yes, I have a new cover on the way but wondering if I should do more. Saw on another site that it may help oil pressure.

Some guys tap the tops of the towers and put Allen head screws in them. The O-rings can seep oil, but it's not a major issue.

Apr 20, 2020 | 03:58 PM

Project GatTagO

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From: Little Austin

The LH8 2009 Colorado 5.3L (and probably other engines) is a gen 4 block but did not have DOD, so the cover has the o-rings on the bottom to seal off the passages. Tapping and plugging those holes kist seems like extra, and unnecessary work.

Andrew

Apr 21, 2020 | 07:52 AM

TrendSetter

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From: Florida

Quote:

Originally Posted by Project GatTagO

yes, i dont understand why you would spend all that time and effort with plugs and screws when you can just install a cover thats designed to block off the ports.

Apr 21, 2020 | 07:54 AM

TrendSetter

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From: Florida

here you go, 10 seconds of googling
https://ls1tech.com/forums/forced-in...l#post19740221

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Apr 23, 2024 | 02:55 PM

rodstored-72

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having dealt with this exact issue & therefore having to rebuild the engine twice. I would HIGHLY recommend plugging the towers. BTR (other sites too) sells a kit for this exact reason.