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Very clattery after head swap. Timing?


 
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idris



Joined: 07 Dec 2014
Posts: 72
Location: Chamonix, France

PostPosted: Thu Nov 15, 2018 14:15    Post subject: Very clattery after head swap. Timing? Reply with quote

(L400 2.8 TD 1997 series 1)

Just replaced head and gasket. Suspected blown gasket, turned out to head cracked between valve and precombustion chamber.

Initial startup okay, after a few min of idle was chuffing. Took the manifolds off and found two smoking guns, both my fault. Miss aligned inlet gasket and half of one of the exhaust gaskets was missing. Fixed both.

Second start up, idle okay. As soon as I tried to drive, relay loud clattering, like diesel knock of old. Yes it's barely above freezing. But could I have screwed up the timing one tooth of the chain? would this cause the problem?

Should I just idle till warm? Should I take the rocker cover off/ wire down a glow plug and check vs timing mark on the pulley - I did this on reassembly and thought all was okay.

Compression could of course be higher with new head?
Just never owned anything that clattered this much on startup (Citroen BX 19D, Disco 200TDI, VW T4 1.9 TD and 2.5TDI even Bongo 2.5TD)
I have heard worse from vehicles of non loving owners, especially transits of old.
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PostPosted: Thu Nov 15, 2018 14:15    Post subject: Google Ads keep this community free to join!


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YOZA



Joined: 07 Mar 2005
Posts: 2423
Location: The centre of the universe

PostPosted: Thu Nov 15, 2018 16:40    Post subject: Reply with quote

When its running crack off, then retighten each injector pipe at the injector end.
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Deker



Joined: 08 Mar 2008
Posts: 3833
Location: Borehamwood

PostPosted: Thu Nov 15, 2018 19:33    Post subject: Reply with quote

Idris.
The marks on the pulley (crankshaft) may be reliable due to possible de-lamination of the rubber twixt the two parts.

Mr D
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YOZA



Joined: 07 Mar 2005
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Location: The centre of the universe

PostPosted: Thu Nov 15, 2018 22:30    Post subject: Reply with quote

The marks on the pulley (crankshaft) may be reliable due to possible de-lamination of the rubber twixt the two parts.

Unreliable, even.  Wink

The late and great V8Rick timed mine via the notch in the front of the cam and a piece of net curtain wire down heater plug one, he could feed this through the pre-ignition chamber and then feel the movement of the piston.
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idris



Joined: 07 Dec 2014
Posts: 72
Location: Chamonix, France

PostPosted: Fri Nov 16, 2018 12:53    Post subject: Reply with quote

YOZA wrote:
When its running crack off, then retighten each injector pipe at the injector end.


This was the answer, although I solved it by driving gently uphill for 10 min, got it good and warm, problem evaporated. Smile

As for the pulley not being a reliable source of TDC, it was the relationship of the pulley and the camshaft I needed, nothing to do with inj pump. So it would be pulley or possibly flywheel/flexplate?
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YOZA



Joined: 07 Mar 2005
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PostPosted: Fri Nov 16, 2018 14:57    Post subject: Reply with quote

Do I get a PRIZE.  Embarassed
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Deker



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PostPosted: Fri Nov 16, 2018 19:40    Post subject: Reply with quote

YOZA wrote:
Do I get a PRIZE.  Embarassed

YES  Smile  For correcting my typo  Embarassed

Mr D
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