Block Drain Plug???

Reply Subscribe

Thread Tools

Search this Thread

Jun 4, 2008 | 12:35 PM

Whitecloud

Thread Starter

Pro

Joined: Apr 2008

Posts: 610

Likes: 2

Block Drain Plug???

I am in the middle of changing my coolant and I can't find the block drain plug. The factory service manual doesn't tell me where it is. I need help. I have the radiator drained, is that all I need to do? Or do I need to drain from the block drain whatever and wherever that is? Help???

Read my last post and thanks everyone for sharing your knowledge and support.

Last edited by Whitecloud; Jun 4, 2008 at 11:00 PM.

Jun 4, 2008 | 12:43 PM

pianoguy

Safety Car

Joined: May 2007

Posts: 3,651

Likes: 10

From: Apple Valley MN

On LTx engines, the block is drained by removing the knock sensors on each side of the block. Not sure if the L98 also uses this method.

Jun 4, 2008 | 12:50 PM

Fastcossi

Intermediate

Joined: Jun 2008

Posts: 49

Likes: 0

From: Schwarzenau / Austria

On L98 block draining you have also to remove the knock sensor.

Jun 4, 2008 | 12:56 PM

Whitecloud

Thread Starter

Pro

Joined: Apr 2008

Posts: 610

Likes: 2

I can't find the knock sensor. Is it underneath the block or on the side of the block, and is that where the drain plug is also? Confused???
But I'm not giving up and will keep trying. Thanks for everyones help. Todd

Jun 4, 2008 | 01:21 PM

Aardwolf

Race Director

Joined: Jun 2004

Posts: 13,949

Likes: 705

From: WI

On my year I used the knock sensor on the passenger side of the block, there is a metal heat shield over it if I remember correctly.

Jun 4, 2008 | 01:23 PM

Fastcossi

Intermediate

Joined: Jun 2008

Posts: 49

Likes: 0

From: Schwarzenau / Austria

I think it´s near the motor mount rubber right side istn´t it?

Jun 4, 2008 | 03:03 PM

NEVRL8T

Race Director

Joined: Mar 2006

Posts: 11,628

Likes: 1

From: Sherwood, Arkansas

Quote:

Originally Posted by todds87dream

There is no drain plug. The knock sensors are the drain plugs so to speak.

Jun 4, 2008 | 03:24 PM

Whitecloud

Thread Starter

Pro

Joined: Apr 2008

Posts: 610

Likes: 2

Oh! Well I'm tackling this after lunch. I'll let you know how it goes. Thanks again.

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Joe Kucinski

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Joe Kucinski

8 Coolest Corvette Pace Cars (and Replicas) of All Time

Verdad Gallardo

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Joe Kucinski

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Verdad Gallardo

Top 10 Corvettes Coming to Mecum Indy 2026!

Brett Foote

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Michael S. Palmer

10 Revolutionary 'Corvette Firsts' Most People Don't Know

Joe Kucinski

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Michael S. Palmer

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Joe Kucinski

Jun 4, 2008 | 03:26 PM

AGENT 86

Team Owner

Joined: Jan 2003

Posts: 20,297

Likes: 240

From: Summerland B.C. Canada

There is a drain hole on both sides of block(just after of lower center).
Drivers side has a plug or hose/nipple to oil cooler and pass side has the knock sensor in the hole.

Jun 4, 2008 | 08:58 PM

#10

Whitecloud

Thread Starter

Pro

Joined: Apr 2008

Posts: 610

Likes: 2

When you disconnect the knock sensor is there a round white ceramic piece connected to the bolt that you have to unscrew to drain the fluid. And what size is the bolt?

Jun 4, 2008 | 10:58 PM

#11

Whitecloud

Thread Starter

Pro

Joined: Apr 2008

Posts: 610

Likes: 2

Holy Crap!!!

I found both drains. Unbelievable. The plug on the driver that is connected to the hose, was so old that I had to cut the plug and will buy a new hose tomorrow. This is just incredible, the amount of frustration and satisfaction that takes place at the same time. I will also call ecklers or mid america tomorrow to find out the size of wrench I need to loosen the knock sensor. One project turns into two and three and....well you get the idea. thanks everyone for your support and knowledge. Todd

Jun 4, 2008 | 11:42 PM

#12

John A. Marker

Le Mans Master

Joined: Mar 2004

Posts: 5,107

Likes: 171

From: Dublin CA

Use an adjustable wrench or start trying box ends until you find one that works.

Jun 5, 2008 | 04:14 AM

#13

Fastcossi

Intermediate

Joined: Jun 2008

Posts: 49

Likes: 0

From: Schwarzenau / Austria

Also take care for the correct torque by mounting the knock sensor again. The knock senor is very sensitive and if mounting with inncorrect torque you can damage it....