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Zero Compression, turns but does not fire

 
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ktmpeak



Joined: 12 Jan 2018
Posts: 2

PostPosted: Fri Jan 12, 2018 9:10 am    Post subject: Zero Compression, turns but does not fire Reply with quote

I picked up a 06 pathfinder 150K miles from a woman that didn't want to spend any more money on it.

It turns over but won't fire. Compression check on 1,2,4 zero compression

I opened the timing chain cover and it appear that the chain may have jumped a tooth or two. the Timing tensioner is all the way extended.

I'm thinking about replacing he chain, guides, tensioner, and water pump.
Then I plan to hand turn it over to see if if binds up due to a bend valve.

Thoughts

What are the odds it has a bent a valve?
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eieio
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Joined: 17 Jul 2009
Posts: 1768
Location: Prescott, Az.

PostPosted: Fri Jan 12, 2018 9:21 am    Post subject: Reply with quote

..........a cylinder leakdown test would tell you if there's leakage between the valves & heads without going to the expense of the repairs you mentioned
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Kestral
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Joined: 12 Apr 2014
Posts: 689
Location: MA

PostPosted: Tue Jan 16, 2018 5:24 pm    Post subject: Reply with quote

eieio wrote:
..........a cylinder leakdown test would tell you if there's leakage between the valves & heads without going to the expense of the repairs you mentioned


Exactly! Don't order anything untill you find out how the compression is. If it has no compression and it also need the complete timing set it may be more cost effective to just order a complete rebuilt engine or find a used engine at a junk yard. Is the transmission in good shape?
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smj999smj
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Joined: 22 Jan 2012
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Location: Prospect, VA

PostPosted: Wed Jan 17, 2018 2:07 am    Post subject: Reply with quote

They are interference engines and they will bend valves, so it may need to have the heads removed for a valve job, as well. If that's the case, I agree that a salvage yard motor may make more sense, especially if you can get one from a 2011 or later.
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palmerwmd
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Joined: 31 Jan 2017
Posts: 329
Location: Virginia

PostPosted: Wed Jan 17, 2018 5:25 am    Post subject: Reply with quote

There are always used engines available. Some of which are quite good and reasonable priced.

Swapping an engine is no joke but its a lot easier than rebuilding one.
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Kestral
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PostPosted: Wed Jan 17, 2018 6:22 am    Post subject: Reply with quote

If the body, frame and transmission are in good shape then I would get a good used motor or even spend the $ for a nice rebuilt one.
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