Rb25det Rod Tourqe Setting In One Go Not Turn 60degrees

[cuztomr33]

hello can somone tell me what the tourqe setting is for conrods-- fsm is 15nm then 60 degrees, thats a crap way of doing it, fair enuff on head bolts but. bit risky on rods. some say 40ftp on mains and same on rods,, 40ft pound? is alot for rods. anyone?

its holding me up in my rebuild. thanks guys

[The Dan]

Factory rod bolts and main bolts 50nm for both.

FSM says torque in kg/cm2 or something....nothing about 60 degrees.

If you have aftermarket rod bolts/rods or main studs then these settings will be different

[cuztomr33]

cool thanks. seems to be alot for the rod bolts tho? this is what i have in fsm---14-16NOm (1.4-1.6kg-m) mark with white marker and turn 60-65 degrees. ??? told have to turn in degrees as bolts tend to strech a bit.. i was going to tighten to say 20ft pd,, but u think 50 ftpnd. can i ask how u got tht,different manuals?

Factory rod bolts and main bolts 50nm for both.

FSM says torque in kg/cm2 or something....nothing about 60 degrees.

If you have aftermarket rod bolts/rods or main studs then these settings will be different

[The Dan]

I got that from the factory manual......and I didn't say ft/lb....it's 50nm

[cuztomr33]

sorry i ment Nm, well i must say thank heaps, (just seems alot do u agree tho)

[The Dan]

Also I have run this on two RB25 engines that still used factory rods and bolts and they are both over 80,000k old without issues

[The Dan]

when you have the torque wrench in your hand and and you click 50nm onto that rod bolt, tell me then that you think it feels like too much. I reckon it feels like not enough. But it's not a matter of how many nm or ft/lb required, it all comes down to bolt stretch. If you have a stretch gauge, torque them down til you see 0.006 stretch and that will be spot on.

[cuztomr33]

sounds bloody good to me, ill go and finish her off. . all my other motors,long as theres bit of movent all good, ill let no how they feel .

Also I have run this on two RB25 engines that still used factory rods and bolts and they are both over 80,000k old without issues

[cuztomr33]

yes thats tru. they do lock once load has been applyed ,started. so it should be 36ft p

thts good because i done big ends at 35ftp

when you have the torque wrench in your hand and and you click 50nm onto that rod bolt, tell me then that you think it feels like too much. I reckon it feels like not enough. But it's not a matter of how many nm or ft/lb required, it all comes down to bolt stretch. If you have a stretch gauge, torque them down til you see 0.006 stretch and that will be spot on.

Edited June 25, 2010 by cuztomr33

[cuztomr33]

just done 1 to 36ish ft p. should be 50Nm. theres still movement, so thts good sign.

[The Dan]

Have you ever built an engine before?

You should be taking the bearing measurements prior to fitment and use a micrometer. How are you measuring bearing clearances?

[Adriano]

What do you mean by movement, torquing the rod bolt shouldnt effect bearing clearance.

[cuztomr33]

yes i have built diesels to 202's to sr20's.few other types,plus bikes 38models to 2000.

when i said movement i ment, once tight, you should be able to still move rod foward and back a bit. all good sumps on.

What do you mean by movement, torquing the rod bolt shouldnt effect bearing clearance.

[Adriano]

Good luck, hope it all goes well for you

[cuztomr33]

cool thanks, And many thanks to Elite Racing... very helpful...if i get the chance il ship some customers to you

Good luck, hope it all goes well for you

Edited June 25, 2010 by cuztomr33