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Technical (156)
 Alfa Romeo forum : Technical (156)
Subject Topic: Alfenia: Cambelt & variator [ Picís ] Post ReplyPost New Topic
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Black Beauty
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Posted: 03†March†2008 at 22:36 | IP Logged Quote Black Beauty

the bibles Jaaps & Gazza82:



slack old cambelt tensioner:


old v's new parts:








lower crank pulley off:


coverless engine:



rocker cover off:


crank marking


the infamous cam sensor


AUX & Balance belt stuff pic's:












cam shaft out:



Variator pic's:









new belt fitted, crank marking is good:



phew... ok at last:)


Edited by Black Beauty on 08†March†2009 at 15:05
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156-2.5-V6
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Posted: 03†March†2008 at 22:51 | IP Logged Quote 156-2.5-V6

- welcome back pix

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Black Beauty
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Posted: 03†March†2008 at 23:08 | IP Logged Quote Black Beauty

tips:

i white paint the side of the timing belt at the original white marks .... help to line up marks easier


tie wrap the timing belt to the exhaust pulley, saves the need for growning a 3rd hand



Edited by Black Beauty on 16†January†2009 at 19:59
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Posted: 03†March†2008 at 23:12 | IP Logged Quote 156-2.5-V6

Do the markings help align the crankshaft in relation to the camshaft? (which I assume is 'locked' anyway)

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Black Beauty
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Posted: 03†March†2008 at 23:18 | IP Logged Quote Black Beauty

the pictures are for a 2.0TS, not a V6 but as you correct pointed out the cams are locked in place.

lock stamped with an I = Inlet
lock stamped with an E = Exhaust

BOTH inlet & exhaust pulley have rotate on their respective cams, the inlet alot more than the exhaust...... exh can only move by 1 tooth.

so in my case the timing belt was off by ONE tooth on the exhust cam, luckily there was enough slack on the pulley to allow it to come around to the right position.

the inlet can adjsut/rotate by 3 or 4 teeth

ALSO the directional arrows on the new timing belt MUST point in the direction of ration of the engine...

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Posted: 03†March†2008 at 23:25 | IP Logged Quote Black Beauty

recommended tools thread
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Posted: 03†March†2008 at 23:26 | IP Logged Quote 156-2.5-V6

I are lost a bit here - if the camshafts are 'locked' how can the pulleys rotate

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Posted: 03†March†2008 at 23:32 | IP Logged Quote Black Beauty

NOTE: CAM LOCKs are fitted to the wrong cams in this picture so i have obsecured them to avoid confusion

i wondered that too until i studied a picture similar to this:



inlet cam pulley, on the left, has 4 5mm allen headed bolts, they fit thro 4 slotted holes [ located behind the shiney disc ] .... thats the adjustment

exhaust cam pulley, on the right, has one 18mm bolt ..... very very tight [ 125Nm ] ... when loosened it has '1 tooths' worth of movement.

Edited by Black Beauty on 08†March†2009 at 16:34
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Posted: 03†March†2008 at 23:43 | IP Logged Quote 156-2.5-V6

so there's enough friction caused by the hex bolts when 'torqued' to prevent movement in the pulley when engine is turning over?

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Posted: 03†March†2008 at 23:44 | IP Logged Quote Black Beauty

parently so..... iirc [ know war da meem jon ] they are 12Nm ...

jaap wrote:
Torque settings
General note: I always use a torque wrench wherever possible. Iím sure that the mechanic at my local garage doesnít, and maybe itís not always necessary, but it does give me peace of mind. But itís up to you whether you want to do so or not.



Crankshaft pulley bolts         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;21-26 Nm         &nbs p; 15-19 lb.ft

Timing belt tensioner nut         &nb sp;         &nb sp;         &nb sp;         &nb sp;         &nb sp;       24-29 Nm         &nbs p; 18-21 lb.ft

Balance belt nut         &nb sp;         &nb sp;         &nb sp;         &nb sp;         &nb sp;                      12 Nm         &nbs p;     9 lb.ft

Inlet camshaft pulley bolts         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;     12 Nm         &nbs p;     9 lb.ft

Exhaust camshaft pulley bolt         &n bsp;         &n bsp;         &n bsp;         &n bsp;          100-124 Nm       74-91 lb.ft

Camshaft bearing cap bolts         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;   13-16 Nm         &nbs p; 10-12 lb.ft

Valve cover and timing belt cover bolts         & nbsp;         & nbsp;         & nbsp;   9 Nm         &nbs p;        7 lb.ft

Water pump bolts         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;        17-21 Nm         &nbs p; 13-15 lb.ft

Variator solenoid bolts         & nbsp;         & nbsp;         & nbsp;         & nbsp;         & nbsp;         1 4-20 Nm         &nbs p; 10-15 lb.ft


Edited by Black Beauty on 03†March†2008 at 23:49
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Posted: 04†March†2008 at 00:01 | IP Logged Quote 156-2.5-V6

Black Beauty wrote:
parently so..... iirc [ know war da meem jon ] they are 12Nm ...



something something roman catholic innit?

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Posted: 04†March†2008 at 00:02 | IP Logged Quote Black Beauty

@ Jon ...
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