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Engine lost compression?

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You probably on the exhaust stroke when you line the cam and crank

Do this lift the distributor, hold rotor in place and have it postion to no.5 cap tower then fully install the distributor and see what happens
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Monday, January 11th, 2021 AT 6:21 PM (Merged)
Tiny
FULLMONTE383
  • MEMBER
  • 5 POSTS
So the crank may be 180 degrees off?And the cams can only go one way?
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Monday, January 11th, 2021 AT 6:21 PM (Merged)
Tiny
MATHEW MORRIS
  • MEMBER
  • 1 POST
  • 1997 HONDA ACCORD
  • 0.9L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 24,000 MILES
Was driving great then going to work one morning just shut off. I did compression check, #1 90#230#3 30#4 90. Could that be head gasket or timing slipped? Or cam? I am stumped. Please any suggestions?
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Monday, January 11th, 2021 AT 6:21 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Do a wet compression test, that is add a small amount of oil into the cylinder before testing the compression. This will seal the bottom end and if the compression comes up the problem is ring related. If not valve problem do this first.
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Monday, January 11th, 2021 AT 6:21 PM (Merged)
Tiny
CYCLEDR.II
  • MEMBER
  • 3 POSTS
  • 1996 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 217,400 MILES
Car sat for 6 years. Checked filter system, oil and other fluids good, removed spark plugs and poured a capfull of oil in to each cylinder, cranked over, poured in oil again and cranked over, re installed spark plugs, pulled gas fill hose and sucked fuel from fuel tank, added 5 gal. Of 93 octane, installed battery. Using carb cleaner I sprayed small amounts at a time into the breather hose past the air filter 10x and the engine began to run on its own. Warmed engine to full operating temp then reved engine a few times. Drove the care 10 miles and had no issues. Drove the car today 50 miles with no issues. Cranked engine at least 20x today. Engine cooled for 3 hours. Proceeded to crank the engine and found ZERO compression on ALL cylinders. Looked inside of valve cover to find the valve train operating normal, all pulleys turning normal. What happened? TY!
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi CycleDr. II, Welcome to 2carpros and TY for the donation

Verify the valve timing if its correct, T/belt could have slipped a notch or 2-check it by also doing a cylinder leakage test.
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

Thank you for the donation,

You can do one of two tests here easiest is a wet & dry comp test, add a small amount of oil to the cyl and do a comp test, the oil will seal the ring-lands and if comps come up the problem will be rings if no valves, a leak down test will be more precise, an adaptor screwed into the plug hole and low pressure air added with the piston at TDC, you can then listen fir air leaking in the inlet, exhaust, and rocker cover (ring blow by)

mark (mhpautos)
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
CYCLEDR.II
  • MEMBER
  • 3 POSTS
A tooth on the belt would not cause this. Will it?
I had already did the wet (oil) test. Knowing it wouldnot help but did it any ways last night.
The pistons are moving but I tell ya.

There is 0 psi compression on ALL 4 cylinders ALL at once.? All I did was turn the engine off and then 3 hours later tried to crank. Please help.

TY guys and I wish you a Grand weekend!
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Final test is do a leakdown test-if its leaking pressure it should come out of the tail pipe if its exhaust valves, intake valves would be out from the throttle body, rings will be out of the oil dipstick-You have a nice weekend too.
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
CYCLEDR.II
  • MEMBER
  • 3 POSTS
How do I free up sticky valves.
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You can use the old timers trick-use a qt of ATF and run the engine or use seafoam or the marvel mystery oil if none of them work its time to break it open
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
AMBER TARBUTTON
  • MEMBER
  • 1 POST
  • 1992 HONDA ACCORD
Engine Cooling problem
1992 Honda Accord 4 cyl Front Wheel Drive Automatic

How can you tell if you have a warped head with a compression tester if the car won't start up to warm it first?
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
F4I_GUY
  • MECHANIC
  • 3,302 POSTS
The compression will be lower than all the other cylinders. However, this could be anything else.

You will need a leak-tester to determine exactly where the leak is.
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
PETECRAWFISH
  • MEMBER
  • 4 POSTS
  • HONDA ACCORD
I broke a timeing belt on a 1996 accord 2.2 singe cam. Ireplaced it, now I have no on compression in #2, an #4 cylinders.I removed head and found no bent valves. What next.
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you do a dry and wet test-Might want to do a leakdown test to find out where its leaking at.

Did you inspect and mike the camshaft lobes?
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Monday, January 11th, 2021 AT 6:22 PM (Merged)
Tiny
TRACTOR BOY
  • MEMBER
  • 2 POSTS
Sounds like a camshaft problem. Is it turning?
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Monday, January 11th, 2021 AT 6:22 PM (Merged)

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