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no compression on 1998 Nissan Altima

I just replaced the timing chain in my Altima and now I have no compression the bottom chain broke that is why I had to replace it if that helps

Asked by for the 1998 Nissan Altima
Most likely the engine is out of time! Did you do the work? IF so, were the 'colored' links on the chain's CORRECTLY aligned with the corresponding marks on the gears? That's both upper and lower timing sets! Any unusual noise when cranking the engine over now?
IF you are positive the timing chains/gears are in time, "possible" bent valves resulting from the broken chain.
3 more answers
double ck your work
I think you have bent valves due to the broken timing chain.
How's the oil pressure when cranking? Does the oil light go out? Do you have NO compression or LOW compression?
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