I read that to take accurate result testing the compression that the engine needed to be warmed up. Since the engine wont start, any other ways to test compression on a non starting engine?

 

Compression may change a bit when checking a cold vs hot engine but you are not going to read "no compression" because it's cold.

I can't imagine why an engine would go from "runs very smooth and no problem at all" to "no compression found on any cylinder" after simply sitting for a few months. Even if the cam jumped time, I would expect to get something on at least a few cylinders.

 

The only thing I can think of...is...maybe the check valve in the sparkplug end of the compression tester is failing to hold pressure or is missing. I've seen this happen, where the check valves inner portion/core comes lose and falls out...and the tech/mechanic doesn't realize it and you get no reading...and no, it wasn't me...lol.

I'd have them check another engine with this tester or use a different tester on yours or take your vehicle somewhere else for a second opinion.

As stated...engines just don't lose compression from sitting idle for a length of time.

Brian.

 

Ideally, you are supposed to check compression by cranking the engine over by the crank pulley. no compression on any cylinder? either tool failure or shady shop.

engine doesn't need to be warm. when you start you truck in the dead of winter do you have a block warmer? no. im not saying it should be tested at 32 below zero, but shop temperature is fine.

 

I agree. No compression in any cylinder strikes me as impossible with an intact engine.

If the timing chain is broken and the cam is therefore frozen I guess all cylinders could have at least one open valve. I guess.

 

Read that you had this vehicle taken to another shop, hope you report back with their findings.

Thank you,

Brian.

 

Got a call from the land rover repair people. I could pick up the car tomorrow. Sounds good to me or else they will tell me to have the car towed back to my house tomorrow. Possible cause was the timing chain or cam.

 

It will be interesting to see what you find, hopefully, it is nothing to serious.


Brian.

 

Try this... it worked for me...

"Hmm. Yeah. Unlock doors with key. Put key in ignition. Turn to position two. Leave key. Roll down driver window. Leave driver door open. Unhook battery. Touch battery wires together. Let them sit 5 minutes touching each other. Hook back up to battery. Drive away happy (hopefully)." ;-]#

 

^ that solved your "no compression"? That is a magic reset...