What does Bank 1 and Bank 2 mean.

Hello,

I was wondering if someone could explain to me in laymens terms what is the difference between Bank 1 and Bank 2. :confused:

Do these terms only apply to 6, 8 Cylinder engines or to 4 cylinder engines as well? :confused:

Thanks for any help.

Regards,
JOET/CAMRY

Referes to V6 and V8 engines. The key is the V. On these engines there are two "banks" of valves covered by valve covers. The valve cover closest to you as you look at the engine is bank #1. The valve cover furthest from you closest to the firewall/passenger compartment is bank #2. This applies to transverse mount engines as most if not all Camrys use.

EDIT BY RIP - DISREGARD PER PROMANS POST

Referes to V6 and V8 engines. The key is the V. On these engines there are two "banks" of valves covered by valve covers. The valve cover closest to you as you look at the engine is bank #1. The valve cover furthest from you closest to the firewall/passenger compartment is bank #2. This applies to transverse mount engines as most if not all Camrys use.

Wrong!!!

The number 1 bank is where cylinder #1 is. For most (if not all) of Toyota 6 and 8 cylinder vehicles, cylinder #1 is located in the bank that towards the rear of the vehicle, which is close to the fire wall, that is bank #1. The bank in front of the vehicle, close to the radiator, is bank #2.

http://www.autoshop101.com/forms/h37.pdf

Bank 1 is in the rear of the transverse engine - closest to firewall.

Only V-shaped cylinder banks have Bank 2.

Yup, thanks for the catch Proman. I'll just say my head was in a very dark confined space. JOET/CAMRY, my apologies for the added confusion.

Yup, thanks for the catch Proman. I'll just say my head was in a very dark confined space. JOET/CAMRY, my apologies for the added confusion.

No apologie necessary RIP. nobodys perfect.:eek: Thank You for the help anyway. Now from what I understand from the other replies is that Bank 1 is the bank that includes the #1 cylinder and for most Toyota 6 cylinder and 8 cylinder engines it would be the Bank that faces the firewall.....Got it.:wink:

I have been searching on the internet for info on the difference between Bank 1 and Bank 2 and where they were located on a engine. didn't have much luck.:frown:

My friends girlfriend has a 1997 Oldsmobile Cutlass and it came up with the code P0420 CAT Effic Below Threshhold (Bank 1) when she took the car in for the inspection sticker. They asked my advice what that code meant and how to fix it. I googled the code and it said there were a few reasons the code would show up according to the info. I read.

1. the catalytic converter was bad.
2. the oxygen sensor after the catalytic converter (on Bank 1) was bad.
3. the manifold has a leak somewhere.

now I have a better chance of fixing the car for them.runaround well see. Thank you for the help Guys.

Regards,
JOET/CAMRY

Here's a little more info for the 420 code: http://www.obd-codes.com/trouble_codes/generic/p0420-catalyst-efficiency-below-threshold-bank-1.php