Have you verified cam alignment with crank shaft? If the belt slips a tooth of more you will not get compression as valves will be open at wrong time. Put #1 piston at TDC and check all cam + crank marks are at 0 deg.

Jim

 

Two fowled plugs wont keep it from starting, you have other problems. Need to check for spark, fuel and timing there are plugs in the front cover to check timing without removing it.

 

Sorry I missed some of the latest posts when I posted my last post. If timing is correct then I'm with benckj that compression test is not the true readings. Ive never seen an engine loose compression on all cyl at once even with timing off.

 

Not exactly. With timing being off by one tooth you still get plenty compression. You will start getting random misfires and your power is reduced because combustion does not complete in the cylinder and/or not full amount of air/fuel mixture get drawn in. If timing off by two teeth, same you will have the same symptoms but to a worse degree and driveability is impaired more. But you still will get some compression - not zero on 5 cylinders.

 

Correct but it is possible to be off considerably should something like crank pulley slip. Not sure about this engine but others have a vibration dampener located within the pulley that can break and move.

Unless compression check error having extremely low numbers across the board leads to a common fail point. This has to be valve related IMO.

 

That's what I'm thinking - some common fail point that we can't quite zero on.
On your other idea of crank pulley slip - you would have same condition as timing being off. I suspect that if that were the case, you would feel and hear cylinders banging on valves (would result in compression being zero). I really hope OP might be able to take a peak into the cylinders for the tel tale signs of possible valve-to-cylinder contact.

I still did not hear if the engine was red-lined. That could cause valve/cylinder contact even if your timing is correct. This if puzzling and frustrating

 

Hey folks, just throwing this idea out there. Perhaps someone have some more knowledge about this:
Is it possible for a cam gear to move in relation to the camshaft? I don't recall if there is a cotter key on the end of the shaft or a locator pin that aligns the cam gear. If that were to happen, the gears would still appear to be in time, but actual valve timing would be off. If this were to happen on one bank, we would have one side of the engine with no compression. Since the engine has no compression on both banks, is it possible for this to happen to the timing gear on the crankshaft?

 

Looking at this photo, the timing marks are not aligned. The proper timing mark is the little "v" on the head (to the left of where the mark on the cam gear is). Did you pull off the timing belt cover on the second bank to verify that both of them align. You may have to remove the serpentine belt pulley to get to to the timing marks on the crank shaft to do a 100% verification.

As you can guess by this and my previous posts you can see that I'm leaning back to direction of timing issue and valve/cylinder contact.

 

took a video of it. still not able to get any compression with the compression checker ;/. i bought a Bosch and it had the adjustable heads to plug.
Only the first cyl reads 30.

 

It doesn't sound like your engine is generating any compression... If there was compression the starter would be laboured just sounds like it's free turning the engine...

Here is a video of a good compression test...
Did it sound like that when you had the plugs in?