gents,

lively discussion---thanks, but i'm lost i think i'll call this one and ask the mechanic to do both jobs to be done at the same time.

bob

I am in same quandry... got a new chain sitting here myself but afraid to put it on. Got the spare link. Don't got the tool to crimp the link. Got a grinder, read the how-to's.

I ask the MB mechanic, he says they use THREE guys in the shop to roll a chain on:
- one turns the crank
- one controls rotation of the camshaft
- one feeds the chain

Why the camshaft I asked? He says the springs on the cam lobes is the biggest concern to cause jumping - forward or backward. I envision a breaker bar being used by the cam shaft guy acting as a brake - not a ratcheting device that would allow backward jump.

When you think about it, ya.. When you unbuckle the chain, that cam becomes free wheeling w.r.t. the crank or anything else. I could easily see the cam doing a spin under spring pressure when lobes are pushed just right, ergo, you just lost timing.

Wise men are those who have done it before and failed. I don't claim or want to be wise with my chain.

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Cheers!
Scott McPhee

1987 300D

remove the rocker arms and and install the chain.. let us know how it goes.

then tell your mechanic

edit: you have 60x engines.. forget it.

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I've found it easy to do with the camshaft off, ... no protruding valves.

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Gone to the dark side

- Jeff

these are certainly much more powerful forces... but they are not as oscillatory in nature as the IP timing gear can be at specific moments in each rotation.

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this is a businessman telling you how difficult of a job it is.

this is a businessman telling you that you cannot do it yourself


It sure would be easier w/ 3 people though.

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There might be another reason to remove the Vacuum Pump.

I started a thread a year ago or more and ask what Members thought caused their Timing Chain break.

Most seemed to think Vacuum Pump failure where the parts dumped down into the Timing Chain and Gears was the cause.

Member Stevo said that he believed that the cause of his Vacuum Pump failure was that the Fuel Injection Pump Timer Bushing was worn having too much side play in it causing stress on the Vacuum Pump Arm/Bearing and ect causing it to come apart.

While that chain is off you might take the time to check the play in this bushing. For some reason there does not appear to be a spec on it and I do not remember what Stevo said he thought it was.
I do not know if the above can be checked with the IP installed.

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84 300D, 82 Volvo 244Gl Diesel