DaveW_396

I just finished re-sealing the front covers on my 2014 E550 and I am trying to button it up. Does anyone know the torque specs on the turbo inlet and output band clamps? Are they all the same spec? Seems like the inlet side clamp on the turbos may be different since it has to compress metal and rubber boot onto the turbo flange.

Thanks!

JettaRed

iTrader: (1)

I could look it up, but for now I would say "tight".

The inlet is less critical since it is under suction/vacuum. It's the outlet hose that is under pressure and will blow off if not tight enough. I would think the torque spec for something like that is less important than the torque spec for the bolts on the cover plates.

DaveW_396

Thx. The torque spec for the cover bolts can be found rather easily on this forum or other internet references.

Everyone's definition of tight is different. Since the pressure side is buried under the intake side and the intake side of turbo is PITA to remove/install I would rather get them set properly without guesswork.

JettaRed

iTrader: (1)

What is your complete model designation? 212XXX

DaveW_396

Argh.... I don't know the answer to that. I tried to pull the data sheet with my VIN. Is this helpful? Thank you again for looking into this.


General Data
FIN WDD2120911B078383
VIN WDDHF9BB4EB078383
Model Year 2014
Model E 500 4MATIC
Engine 278922 30 224248
Transmission 722967 05 783231
Order Number 0 4 715 31648
Order Location UNITED STATES (USA)
Production Number 8885495
Interior LEATHER/NAPPA/SEMI-ANILINE - BROWN (854A)
Paint 1 PALLADIUM SILVER METALLIC PAINT (792U)
Release Date 2014-08-08
Delivery Date 2014-08-08

JettaRed

iTrader: (1)

Yes. Your model number is taken from the FIN. It’s 212091 or 212.091.

JettaRed

iTrader: (1)

I cannot find any torque settings in the WIS for the hose clamps. Like I said, just get them tight.

DaveW_396

thank you for trying to look it up. I appreciate it.

S-Prihadi

Indeed no torque values for hose clamp


Try this : https://static.nhtsa.gov/odi/tsbs/20...41687-9999.pdf

and this : https://www.normaamericasds.com/blog...lt-hose-clamps

BREEZE Power-Seal and AeroSeal Worm Drive Hose Clamps

These are found in sizes from 7/16" to 7" in diameter. The correct torque is 30-45 in. lbs. for the stainless screw versions and 27-35 in. lbs. for the carbon screw versions.

30 inch lbs = 2.38 Nm
45 inch lbs = 5 nm.

5Nm is very mild torque, very very mild.
I tightened my similar rubber boot for my M276.8 Turbo , its aftercooler more then 5Nm I am sure ( I did not torque meter it ), I just use my own judgement,
but I on purpose use the smallest and shortest 1/4" ratchet so that it will deliver least power.

This boots : Item 550, 600 & 700




Is your hose clamp still using this model ?

https://www.ebay.co.uk/itm/256289259027








My hose clamp has position lock from the rubber boot, but still is a worm gear style. So same torque applies.
https://www.ebay.co.uk/itm/266376373864

DaveW_396

Hi S-Prihadi,

Thank you very much for the detailed investigation and links. Yes the connections/claps look like what you posted. They do not have the little rubber stoppers that I could tell. They do look like stainless since they are unblemished after 10yrs so I will go with the torque range of 30-45 in. lbs.

DaveW

ygmn

tons of info for the v-band geek and even how to install per their site.
Everything You Need To Know About V-Band Clamps - EngineLabs

Find your size here and they list some torqs based on dry or lubed.:
1.5-inch V-Band Clamp (Quick-Release) - 304 Stainless– Ace Race Parts

google is wonderful

DaveW_396

is this the right post? While those clamps look robust they are not use in my application.

JettaRed

iTrader: (1)

The V-Bands really aren't hose clamps, per se. I'm trying to remember where I've used them before. Either on an exhaust or turbo. They do require a flange on the pipes you are connecting.