You can use a Y iron in a R5 engine... [Archive]

View Full Version : You can use a Y iron in a R5 engine...

-xlr8planet-

11-29-2008, 09:32 PM

As long as its a middle iron

what you CANNOT mix, its front and rear irons

New apex seal vs. used apex seal. The triangular piece is new on both
http://img355.imageshack.us/img355/6679/dsc03027cv7.jpg

YES, you can use a middle Y irong in a R5 engine.
http://img355.imageshack.us/img355/6259/291120081055iy8.jpg

http://img355.imageshack.us/img355/9368/291120081064om5.jpg

http://img339.imageshack.us/img339/2141/291120081065yz2.jpg

Porrrrrrrrrrrting

http://img149.imageshack.us/img149/3919/291120081066rn1.jpg

http://img339.imageshack.us/img339/9269/291120081071wk0.jpg

http://img367.imageshack.us/img367/6041/291120081072ho7.jpg

http://img367.imageshack.us/img367/5769/291120081076gj5.jpg

http://img212.imageshack.us/img212/1804/291120081077of5.jpg

http://img529.imageshack.us/img529/869/291120081080bd6.jpg

http://img529.imageshack.us/img529/6973/291120081082ew3.jpg

http://img212.imageshack.us/img212/4179/291120081084pb1.jpg

Whizbang

11-30-2008, 10:22 AM

not exactly familiar with "R5". What is that referring to exactly

-xlr8planet-

11-30-2008, 11:12 AM

not exactly familiar with "R5". What is that referring to exactly

R5 is the designation for the 79/80 12A irons.

Y is the designation for the 81/85 irons.

R5 engines use 18 tension bolts

Y engines only use 17

There are small changes depending on what market the engine was going to.

Jeff20B

12-09-2008, 01:53 PM

I have various R5 rear plates with 19,18 and 17 tension bolts. It depends on the year they were made. Most nitrided ones lack an oil pressure hole so it takes a steady hand and lots of patience to drill and cut threads.

Whizbang

12-09-2008, 01:56 PM

am i looking at it wrong, or is the tension bolt going to be exposed in the water jacket?

Jeff20B

12-09-2008, 02:09 PM

A Y intermediate can't be used with all 19 tension bolts because the casting apparently won't allow it.

-xlr8planet-

12-10-2008, 06:15 AM

A Y intermediate can't be used with all 19 tension bolts because the casting apparently won't allow it.

I only have 18 tension bolts on my R5...

see

http://img339.imageshack.us/img339/9269/291120081071wk0.jpg

and I placed a black X where the tension bolt that the Y iron does not support should be.

-xlr8planet-

12-10-2008, 06:18 AM

On the R5 middle iron, (blue mark) you have a tension bolt hole.
On the Y iron (red mark) you dont, its all water.

On the rear R5 iron, you DONT have the tension bolt hole

So I guess it doesnt matter.