1984 HM engine torque settings

[Vdub8v]

Hi all I am sure this topic have came up in the past but I am looking for the torque settings for the HM 1600 engine specifically the setting for the camshaft sprocket to camshaft the sprocket on the auxiliary shaft and the timing drive sprocket to crankshaft torque setting. thank you

[VAG Fan]

I have only the relevant section from original German workshop manuals, but unfortunately some of the torque entries show a cross-reference to another section of the manual (which I don't have).

The crankshaft sprocket is one of those that only show a cross-ref. number. But from memory, I think it is tightened to 105 or 110 Nm. I think you should be able to confirm this with a Google search. The HM was a classic early "EA 827" engine, and I think that most of those used the same torque specs. Other similar 1600 engines would be HN, EW, EZ, EZA, ABN, and even FR (although that last one had mechanical valve lifters).
The camshaft sprocket torque I do have, it's listed as 80Nm.
The aux. shaft sprocket is not listed at all. (And I see why. I've never had to remove that sprocket.)

I also have torque/angle numbers for cylinder head bolts, main bearings, big and small ends, oil pump, oil sump screws, oil drain plug, pressure plate to flywheel, camshaft bearing caps, tappet cover, both manifolds, spark plugs, front main axle nut, outer tie rod end, some of the brake screws, and wheel bolts. Let me know if you need any of those.

P.S.: 1984 HM, that must be a very early CitiGolf, or perhaps Golf 2? [Edit, probably it's the Jetta 2 in your profile.]

[VAG Fan]

I've also found an old thread showing Bentley data for "Mk 1" engines.
viewtopic.php?t=223437
It confirms what I seemed to remember, that the aux. shaft sprocket is identical to camshaft, 80 Nm.

It lists the crankshaft timing belt sprocket as two options:
... hex bolt with washer: 150 Nm
... 12-point bolt without washer: 90 Nm + 90°

[Vdub8v]

Thank you for the info I appreciate it. and my apologies it is a 1986, I removed the auxiliary shaft sprocket to replace the oil seal. Yes it is a Jetta MKII, I also wanted to replace the cam belt and saw the oil leak. My engine have the hex bolt withe washer, so then the it will be 150nm, sounds a lot though but it was very very tight to get loose so it must be rite

[VAG Fan]

Yes, I agree, 150 Nm sounds high. But some of those bolts are tightened to CRAZY torques. I remember the one on my Audi 5 cylinder (which had a vibration damper built into the pulley) was specified at something crazy like 400+ Nm.

What I sometimes do, if a torque spec sounds implausible to me, is to measure the diameter and pitch of the thread and check the tensile strength class of the bolt, e.g. 10.9 or 12.9, and then look up the torque in standard torque tables. (Google will easily find you a couple of those.)