I finally finished putting my engine back together to the point where I could try and start it. However, after it failed to start we checked the compression and in cylinder 1 the compression was 0 and in cylinder 2 it was only around about 30. What could be causing this and what should my next steps be?
Engine has no compression
- Thread starter Citified Chalk
- Start date
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It could be a blown head gasket.
Valves?
With limited information … it could be a lot of reasons…
Valves not adjusted correctly and they are open?
Warped head and it’s not seating well?
Didn’t torque the head?
Never checked valves and the are cracked and or not seating correctly?
Didn’t use a head gasket?
I am siding towards valves not adjusted
Valves not adjusted correctly and they are open?
Warped head and it’s not seating well?
Didn’t torque the head?
Never checked valves and the are cracked and or not seating correctly?
Didn’t use a head gasket?
I am siding towards valves not adjusted
Have you looked at any manuals?
free downloads Land Cruiser Factory Service Manuals (FSMs) - https://www.cruisercult.com/factory-service-manuals
What are the other 4 jugs doing? Have you tested the compression wet? What about a leak down test - parts stores will loan you the testor.
You should provide more information on what you did.
free downloads Land Cruiser Factory Service Manuals (FSMs) - https://www.cruisercult.com/factory-service-manuals
What are the other 4 jugs doing? Have you tested the compression wet? What about a leak down test - parts stores will loan you the testor.
You should provide more information on what you did.
Need more information, like did you have the head off, but I got a shiny nickel on open valves.
- Thread starter
- #7
I am doing a leak down test later today, and will probably also test the other 4 cylinders.
- Thread starter
- #8
I personally haven't taken the head off, but the guy I bought it from may or may not have. The history is a little shaky on what was done in his ownership. On a scale of 1-10 how difficult would fixing the valves be?
Too rule out the valves, it's a 1/10 - just back them all off. But then you need to re-adjust them, starting from zero. That's maybe a 5/10 once you read the FSM and procure a feeler gauge.
Post #47 is pretty straightforward.
B4 you do anything you need to finish checking compression wet and dry. Then probably a simple leak down test by applying air to each compromised cylinder while they are on tdc of the compression stroke and listening and looking for air leakage. Listen to the exhaust, carb, oil fill, adjacent spark plug hole and look for bubbles in the rad. Its usually best to determine what's wrong b4 tearing it apart. What's the antifreeze and oil look like?
Stuck valve(s) would be my first guess, but agree that a leak-down test would tell you real quick without doing anything else.
1 - do you believe the values based on how fast it spins over?
2 - check the compression tester is screwed in properly
3 - check if you can wiggle any of the valve rockers on the closed valves
4 - check that the head nuts are tight
2 - check the compression tester is screwed in properly
3 - check if you can wiggle any of the valve rockers on the closed valves
4 - check that the head nuts are tight
Adjusting valves is a 5/10 job?
What the hell happened to the population of this place? That's routine maintenance for any landcruiser prior to 1991. We are doomed.
Are we talking
here? Adjusting valves might be if you're doing a good, thorough job.
mattressking
10 digits to freedom
If you can't comfortably do a valve adjustment or learn to.....you're going to piss people off on here asking questions.
If you don't have compression after confirming valve lash on all cylinders (remember to read the manual carefully) you need to service the top-end at minimum, but a leakdown is wise. Might be in for more than you bargained for.
If you just rebuilt the motor yourself and zero compression.........yikes. This will be fun to watch.
If you don't have compression after confirming valve lash on all cylinders (remember to read the manual carefully) you need to service the top-end at minimum, but a leakdown is wise. Might be in for more than you bargained for.
If you just rebuilt the motor yourself and zero compression.........yikes. This will be fun to watch.
I guess my comment was based off the gen population, not the old timers roaming around here, and, no offense to OP, but his newb questions. And starting from zero, not just a regular adjustment.
Ask any tech under 40 if they own a feeler gauge and if they say yes, then ask when they last used it.
Feeler's Gauge - Didn't Trump use one when grabbing stuff?