Anyone know the torque specs for the intake/exhaust manifold?
'85 300SD

__________________
'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

I just checked my CD FSM and to my horror they don't specify the torque numbers for tightening the manifolds. Now that's frustrating!
I guess you can try calling your local stealership's service department if no one from the forum is able to get you the torque specs.

__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

I had the manifolds off once before and I don't recall using a torque wrench to put them back on. I just got to thinking after taking them off a second time, some of the bolts were a little loose.
Thanks for the response.

__________________
'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

Bump.

I'm still wondering about the actual torque specs myself. I'd also like to do this conversion but I would't want to do it until I had all the specs.

__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

METRIC-FULL NUT
bolt
shaft
SIZE______NM________KGF_M______LBF FT

M_6______11-13_____1,2-1,3_____8-10_LBF_IN

M_8______28-29_____2,8-3,0_____20-22

M_10_____56-59_____5,7-6,0_____41-44

M_12_____95-98_____9,7-10,0____70-73

M_16____240-249___24,5-25,4____177-184

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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Whunter, while those numbers appear to make sense, I think they're more applicable when tightening them on iron to iron components. I would be a little more cautious in cranking down on the nuts that hold the alloy intake manifold to the head. I don't think I would want to use the same torque figures on the intake manifold as I would on the exhaust manifold. I'm sure that there are different expansion forces involved between the two manifolds and their materials.
I just wonder why those specific numbers are so mysteriously missing from the CD FSM.

__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

METRIC-FULL NUT

SIZE______NM________KGF_M______LBF FT

M_6______11-13_____1,2-1,3_____8-10_LBF_IN

M_8______28-29_____2,8-3,0_____20-22

The bolt shaft is either M_6 or M_8 for intake manifold

8-10_LBF_IN = inch pounds

20-22 LBF FT = firm force on a small ratchet or wrench.

Ah, I did not explain the convention used in the chart, will go back and edit it now.

Thank you.
whunter

Makes sense now!
Thanks.

__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

That is why I thought to ask in the first place. The cast iron exhaust and aluminum intake definately expand and contract at different rates.
The intake and exhaust kind of mesh together when you put them on so the nuts that secure them are common to both.

__________________
'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R