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Torque Settings - how low can you go


 
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PeterInYork



Joined: 16 Jul 2012
Posts: 112
Location: York

PostPosted: Mon Apr 15, 2019 16:58    Post subject: Torque Settings - how low can you go Reply with quote

I am about to attempt to change the gaskets etc on my rocker cover.

The torque setting seem very low.

I need to buy a torque wrench but cannot locate one that goes down to the setting required to do the job.

Any help appreciated.

Cheers
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Deker



Joined: 08 Mar 2008
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Location: Borehamwood

PostPosted: Mon Apr 15, 2019 20:57    Post subject: Reply with quote

I assume you are using a 1/2" drive wrench.

You may need a 3/8 torque wrench to get the lower numbers.

HTH

Mr D
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andyman



Joined: 08 Dec 2012
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Location: Penrith

PostPosted: Mon Apr 15, 2019 21:35    Post subject: Reply with quote

The cam cover gasket doesn't have to resist much pressure, so the nuts don't need a lot of torque. You may need to go back and re-tighten them after the gasket has bedded in.
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Lewis
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PostPosted: Tue Apr 16, 2019 7:30    Post subject: Reply with quote

Torque wrenches for such low values are invairiably 1/4" and expensive. The cheapest I've seen are around £50. Worse still you may only use them a couple of times. If your building computers and assembling electrical parts you may use them more.

I found that at the 0.4psi required for the seals. Applying some Wynns gasket maker at the back of them, fastening them in firmly finger tight, followed by a 1/4 - 1/2 turn, with a socket, is sufficient. If your deforming the rubber, it's way too tight.

NB: finger tight is subjective, to whatevever occupation you have.  Laughing Screwing the front and rear halves of a mains plug together uses far more than 0.4psi.  Wink
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Fostlongstrider
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Joined: 03 Mar 2008
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PostPosted: Tue Apr 16, 2019 9:02    Post subject: Reply with quote

I use a motorcycle torque wrench for low pressures, but as Lewis says finger tight plus a small turn is sufficient at that low pressure.

Just as you would for spark plugs in a petrol engine.
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PeterInYork



Joined: 16 Jul 2012
Posts: 112
Location: York

PostPosted: Tue Apr 16, 2019 9:19    Post subject: Reply with quote

Cheers guys.

Finger tight it is.

Ordered my gaskets from Milners, just need some gasket sealant.
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mark3



Joined: 29 Nov 2009
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PostPosted: Tue Apr 16, 2019 11:43    Post subject: Reply with quote

Assuming you have a 2.8 the torque setting is 4nm which on an engine thats 20 years old, has probably over heated a few dozen times at least and been though several million heat cycles is completely inappropriate.

Just tighten it up sensibly and if using new securing bolt bungs pulling the washers nicely onto the bung without destroying them will be just fine, plus DO use some silicon sealer around the half moons BUT don't use it on the main seal......
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PeterInYork



Joined: 16 Jul 2012
Posts: 112
Location: York

PostPosted: Wed Apr 17, 2019 14:31    Post subject: Reply with quote

Is there a walk through for changing the gaskets.

The only one I can find leads to a dead page.

I do not want to make a mistake and fry my engine.
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Lewis
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PostPosted: Wed Apr 17, 2019 21:01    Post subject: Reply with quote

Actually it is quite simple.

    Remove intercooler, unsuring you do not snap the small plastic pipe connector between the radiator and the expansion bottle.
    Undo the bolt holding the ATF dipstick tube to the top of the cover and move it to the passenger side of the engine bay.
    Disconnect the rocker cover breather pipe.
    Undo the two bolts holding the rocker cover in place.
    Remove the old gasket, which is a fitted into a recess in the underside of the cover.
    Remove the two Halfmoon seals, fitted to the front and rear of the cylinderhead. Take note of which goes where, as they have different thicknesses.
    Use a rag to clean off all the upper surface and the inside of the rocker cover.
    Wash out the inside of the breather baffles in the rocker cover, where the breather pipe connects, a good soak in degreaser and use of a steam cleaner will help greatly.
    Refit the new gasket into the rocker cover.
    Fit the halfmoon seals into the cylinder head. Apply a small strip of Wynn's gasket maker to the top of the Halfmoon seals, do not get any on the gasket to metal surfaces, and carefully mate the rocker cover to the cyclinder head.
    Fasten the cover bolt and rubber seals in place, again with a smear of Wynn's under them.
    Refit the ATF pipe, breather pipe and intercooler.


HTH
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PeterInYork



Joined: 16 Jul 2012
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PostPosted: Thu Apr 18, 2019 11:34    Post subject: Reply with quote

Brilliant Lewis.

Thank you
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