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Headgasket trouble? 900 1997

posted by  Metallo on  Mon May 9 20:54 CST 2022
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last visit: Wed Feb 29 21:03 CST 2012
[RELATED]

Amarin,

[quote]
At least do the test prescribed by Volvo From Heck. Before starting the test, select which pair of valves to close first by turning the camshaft manually. Pour gasoline on the closed valves to see any gasoline leak at the intake/exhaust ports. Let the gasoline pool (stay) about 5 minutes or more before deciding any leak or not (common mistake most people do this rather quickly without giving some time). Lots of youtube video on this. [/quote]

The B200FT is an interference engine, so I wonder if rotating manually the camshaft can create any damage. Also, on the Haynes manual they recommend to not rotate the crankshaft, camshaft or auxiliary shaft with the belt removed, which is why I ask for confirmation.

If no damage occurs when rotating the camshaft, shall I do it by re-inserting its sprocket? That should make it easier to rotate.

How can I be sure the valve are closed while rotating them?

Is it when the two lobes are at TDC point like cylinder #1 in my image?
So, al I have to do is to rotate them until I get the two lobes in the same exact position for all 4 cylinders?

Sorry for asking what may sound as the obvious, but mistakes would be expensive :)

Thank you!
Alessandro





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