Oil Cooler Block Off Plate Delete?

[nick0789]

Long story short, my OEM gasket (with rubber o ring built in) went bad and I replaced it with a FelPro gasket (flat metal, no o ring) and am still having oil leakage. Got pissed off and went with the black RTV instead but am still getting a slight seepage.
Now, I couldn’t tell for sure but it looked like the ports on the oil pan were threaded. Is this correct? If so, does anyone know the size and pitch for them? I’d much rather just say screw it and bolt off the ports and be done with it.

 

[01FormulaTA]

No, the ports are not threaded, at least not on any of the LS Oil pans I have seen....but you need the block off plate (part 12577903) and the gasket (part 12611384) and reuse the 2 bolts used for the cooler lines...I deleted the oil cooler on my truck and have used the parts listed and have had 0 leaks

 

[nick0789]

I don’t have the cooler lines on my ‘05 Z71, just the block off plate. My problem is with the seeping between the plate and oil pan even with a new gasket and now with RTV.

Edit: I looked up that part number the other day (thanks for confirming the number I looked up lol) but they only have the vinyl coated gaskets now that I can see.

 

[nick0789]

So the FelPro gasket I used was 72435. The rectangular opening in that gasket matches the block off plate itself, but it doesn’t match the dual ports on the oil pan.
The OEM gasket that came off recently was also rectangular but FelPro also has another part number that is 72462 for a center tube dual port. This gasket has round rubber gaskets in the middle but I don’t think it would be able to seal the rectangular block off plate.

Are there other block off plates available, or is the second gasket listed for use with the oil cooler lines?

 

[01FormulaTA]

there are probably 100 different block off plates from 100 different companies, but the ones I mentioned are the GM parts....just google "LS Oil Cooler Block Off Plate"

I've had issues with FelPro exhaust manifold gaskets leaking in the past, point being now anytime I need to replace a gasket I always go with the OEM part....the part numbers I listed above are available from any GM dealership or eBay or Amazon or GMPartsDirect etc etc....the oem gasket, at least the updated one that I am using and listed above does not have any O-Rings....there are no tricks to keeping it from leaking....obviously its not getting a good seal, the plate or where it meets the oil pan is not perfectly flat

the gasket with the 2 rubber O-rings in the middle is for the oil cooler lines and will not seal with the block off plate

This is a picture of the gasket that will NOT WORK with the block off plate...

You need GM Part 12577903, 12611384.

Gasket will look like this:

 

[01FormulaTA]

http://www.improvedracing.com/oiling-accessories/ls-pan-oil-cooler-delete-kit-p-774.html

Tighten the bolts to 80 INCH lb

 

[nick0789]

Thanks for the replies.

Sorry for my lack of clarification regarding other block off plates. I meant to specify that I was wondering if GM had a block off plate specific for the dual ports that would use the gasket with rubber seals you have pictured, or if it was a “one size fits all” thing with GM and you only get the oval block off plate regardless.

I had thought that using the black RTV would have done the trick for sure but with it still seeping on me I’m concerned that a little droplet of oil leaked out of one of the ports during reinstall and it’s preventing the RTV from mating properly. I’ll just order a new block off plate and GM gasket and see how that goes.

Also, thanks for the torque spec for the bolts! I knew it was in inch pounds so I’ll be sure to not over-do it.


Does the GM gasket have the oval cutout stamped in any particular orientation? Like, does the indentation of the oval point towards the block off plate or the ports? I’m assuming that the portion that extends down past the flat part of the gasket mates inside the block off plate but wasn’t sure if it even mattered in this case.

 

[01FormulaTA]

No, there is no specific block off plate for the dual o-ring gasket, that gasket is only for the oil cooler lines.

The block off plate and gasket listed above should work on any LS oil pan.

I don’t believe there is any specific orientation when placing the gasket. This is only picture I could find...I positioned mine with the squared off corner on the bottom right



“Position a NEW oil pan cover gasket (433) and the cover (434) to the oil pan and install the bolts (435). Tighten the bolts to 9 Y (80 lb in).”

 

[nick0789]

Update:

I have replaced the gasket and no leaks are seen from the block off directly, but it actually looks like the leak I've had this whole time is coming from a plug just above the block off plate (see pic). Does anyone have a part number for this plug?

 

[Carl Dutch Racing]

Update:

I have replaced the gasket and no leaks are seen from the block off directly, but it actually looks like the leak I've had this whole time is coming from a plug just above the block off plate (see pic). Does anyone have a part number for this plug?

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