Cylinder numbering

[doru]

I expected to find this info pretty easy both here and on Inet, but didn't.

The firing order was easy to find: 1-8-7-3-6-5-4-2
But when looking at numbering neigher the GM or Ford schema makes sense given the firi8ng order.

GM is using [top of the table is front of the engine]

LH	RH
1	2
3	4
5	6
7	8

Ford

LH	RH
1	5
2	6
3	7
4	8

So what's the numbering for Toyota 3UR-FE ?

 

[bloc]

Same as GM

5.7 L firing order and cylinder numbering - please confirm

I can't find the firing order for my 2013 200 in the FSM. I believe it is this: Can someone confirm?

forum.ih8mud.com

 

[doru]

Thanks for the find. It answers the cylinder numbering. That post is showing Toyota using GM convention for numbering the cylinders (somewhat expected). But the firing order is for a small block Chevy (picture as such).

The post also points to engine-specs.net and on that web site I found...
The 2ZU-FE has 1-8-4-3-6-5-7-2 that makes sense if we use the same cylinder numbering. Same order is listed here

Firing Order - Toyota Engine Control Systems - Toyota Service Blog

The firing order can be found in the New Car Features book. The cylinders are identified as follows V-8 engine cylinders are numbered with odd numbered

www.toyotaguru.us

Toyota Workshop Service and Repair Manuals > Landcruiser V8-4.7L (2UZ-FE) (2000) > Engine, Cooling and Exhaust | Engine | Tune-up and Engine Performance Checks | Firing Order | Component Information | Specifications

Landcruiser V8-4.7L (2UZ-FE) (2000) > Toyota Workshop Service and Repair Manuals > Engine, Cooling and Exhaust | Engine | Tune-up and Engine Performance Checks | Firing Order | Component Information | Specifications

workshop-manuals.com

But engine-specs.net lists 1-8-7-3-6-5-4-2 for 3UR-FE, which doesn't look right to me. And it is the only source listing this order.

Here Information About The Toyota UR Series Engine | Olathe Toyota Parts Center - https://parts.olathetoyota.com/ur-series-engine is listing the same firing order for 3UR-FE as 1UR-FE.
Wikipedia is saying that manufacturers change firing order on same engine on different generations or applications. So I cannot just asume the same firing order was kept between the old and new LC/Tundra engines.

So which is it? Is there a definitive answer? Can that be found in Techstream?

 

[bloc]

So which is it? Is there a definitive answer? Can that be found in Techstream?

I spent some time digging into the FSM but didn’t find anything promising. I’m surprised by that though.. not willing to give up yet. More later.

 

[doru]

I also dug through FSM both mechanical and general (the specs) and come empty handed.

 

[bloc]

Found an interesting document about various engines that at least looks to be produced by toyota. It lists the same firing order as the UZ series 1-8-4-3-6-5-7-2

https://s3.lightboxcdn.com/vendors/0b137b4b-0efb-494c-a1a2-570e1a3adcae/uploads/dae45114-5e57-492b-8dd8-fcc76bfa4f1f/ToyotaEngineOTPCebook.pdf