2001 XK8 - Engine tries to start but is rough with some backfiring.
#1
2001 XK8 - Engine tries to start but is rough with some backfiring.
I am new to the Jaguar world. Purchased my 2001 2 months ago (73K miles) and have been very pleased. However yesterday it failed to start and now it will barely run with some backfiring. I suspect something with engine timing on at least one head. I understand there are 3 timing chains that operate the cams. First if the timing has shifted or I have lost a chain are there interference issues with pistons and valves? Second is there a way to pull engine codes without a computer? I can see the port side cam turning thru the oil filler cap. I have not investigated further yet.
signed: praying there is no valve damage!!
signed: praying there is no valve damage!!
#3
#4
+2 Don't try to start the engine.
If the secondary timing chain tensioner is in pieces then you have bent valves.
Another possibility is that your oil pump failed and a camshaft seized from lack of oil or the sprocket broke the alignment dowel on the end of the cam. (This happened to me a few months ago)
So even if the secondary tensioner is intact you should run a compression test before trying to start again.
If the secondary timing chain tensioner is in pieces then you have bent valves.
Another possibility is that your oil pump failed and a camshaft seized from lack of oil or the sprocket broke the alignment dowel on the end of the cam. (This happened to me a few months ago)
So even if the secondary tensioner is intact you should run a compression test before trying to start again.
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