LongIsland63SS409

iTrader: (22)

Need the oil cooler block off plate with the threaded boss circled in the attached pic.

Does anybody know the GM part number for it?

Thanks,
Mike

gofastwclass

iTrader: (2)

I'm not aware of them coming from GM threaded. I know people have taken the plug out of them and threaded them to whatever they needed. Some have the nipple like the one pictured and others are just smooth. I prefer the smooth ones, but I don't run oil pressure from there.

LS1MCSS

iTrader: (18)

http://cgi.ebay.com/ebaymotors/LS1-L...item1c1eadf7c3
I have bought several things from that seller. He can be trusted.

DietCoke

iTrader: (18)

Far Left.
97-2000 Corvette OFAC (still available) Part Number 12551587
Comes already drilled and with a metric thread M12 x 1.5
Drill out the metric thread using a 7/16" drill
Tap 1/4 pipe thread
Use a 1/4" male x 1/8" female reducing bush
Screw the 1/8" pipe threaded sender into that.

Centre
Fbody OFAC (No Longer available from GM new**) Part Number 12551595
Comes blank (not drilled and no thread)
Drill out the boss using a 21/64" drill
Tap 1/8 pipe thread
Screw the 1/8" pipe threaded sender into that.
**Part superceded by 12577903

Right
GTO OFAC Part Number 12577903
Comes blank (not drilled and no thread)
Drill the centre using a 21/64" drill
Tap 1/8 pipe thread
Screw in a 90 deg 1/8 pipe male female elbow
Screw the 1/8" pipe threaded sender into that.

LongIsland63SS409

iTrader: (22)

Thank you for all the responses!
Info I was looking for.

Thanks again,
Mike

sjaroslo

I know that I'm resurrecting this from the boneyard but just wanted to share my recent experience. I found a "local" dealership that had 1 12551587 left on their shelves, so I jumped in the car and made the drive on a Friday afternoon to get there before they closed. Long story short, although the sealed bag that the part came in was labelled as 12551587, the actual part inside was the middle one pictured, not the one on the left--hole not bored through and not tapped. So, either the OP got his part numbers mixed up or GM made a running change and substituted the undrilled, untapped version to use up inventory. YMMV.

DietCoke

iTrader: (18)

It's a running change. Its hit or miss what you get in the bags, most of the old C5 vette ones are out of the system by now, and you get the blanks instead. 12551587 has superceded all of the part numbers in GMLan.

squee

iTrader: (16)

I've never actually seen the C5 one. I'm guessing that is a oil temp sending unit?

sjaroslo

I think that the sensor was separate--it was just the engine part that was drilled and tapped that I think that most people are looking for. I think the sensor shown is oil pressure, but I could be wrong.

LS1MCSS

iTrader: (18)

I think it's a vette oil pressure sender.

squee

iTrader: (16)

It looks similar to the coolant temp sensor, and I don't see why the Vettes would have it there instead of at the back of the intake. I'm pretty sure thats a oil temp sensor, just wanted to be sure, so I asked.

sjaroslo

Actually, that probably makes more sense, the oil pressure should be at the back of the intake up top, you're right.

So, I'm sorry to keep :beatdeadhorse: but, assuming that I got a wild hair and wanted to try to drill & tap this fitting to use the stock metric sending unit, I see that there are 2 types of metric 12 x 1.5 taps--"plug" and "tapered." Does anyone know which is appropriate for this application? Thanks!

Edit: Ah, you know what, the e-bay seller listed above is still selling these, already tapped, so if I decide to go this route, I think that's what I'll do.... Plus, CBM has some nice ones available on their e-bay site as well, so I'll check them out if I need additional oil port access. Thanks again. We now return you to your regularly scheduled broadcast.

sjaroslo

FYI, Lingenfelter makes a beautiful billet piece that I'm expecting to arrive today, solves my issue with an oil temp sensor and an aux oil pressure gauge.

http://www.lingenfelter.com/mm5/merc...egory_Code=C54

Steve

1988Bullitt

Does the gasket come with the OFAC? If not do you have the part number? Sorry to resurrect such an old thread but this is good info!

LS1MCSS

iTrader: (18)

http://www.ebay.com/itm/LSX-Oil-Port-Adapter-Billet-1-8-NPT-OIl-Cooler-Block-Plate-LS1-LS6-LQ4-LQ9-LS3-/201053384450?hash=item2ecfb72f02&vxp=mtr