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My engine siezed

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My engine siezed after I changed the head gasket. Got it put back together, timed it, fired it up, it ran great for about a minute, then siezed. What did I mess up? Am I screwed? This an L20B.

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What makes you think it's seized????

 

Were you driving it or just idle?

Does it have oil in it?

Was the oil light on or off?

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Are you sure it seized ? pull the plugs and try to spin it.Maybe you have water in the cylinders ? 

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It won't spin with all the plugs removed. It has fresh oil in it. It ran for 45 seconds to 1 minute (really well). Then made what sounded like a dry cylinder squeal, I immediately switched off the ignition. Attempted to restart it, and got the click sound of a dead battery. Battery is new and fully charged. Then, I attemped to spin it at the crank with a ratchet and no turning it there. So, I pulled all the plugs and tried again, forward and backward. No luck. She is stuck.

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No. Correct gasket. If, by chance, it had a blocked oil passage, wouldn't it run more than a minute? If it is ruined, what would be options for a replacement engine that would bolt up to my manual 4 speed? It is a 4x4.

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Maybe the cam seized in the cam towers. Did you have them off the head? You could have inadvertently plugged the head oil passage when scraping the old head gasket off.

 

Did you remove the oil pump? Did you watch for oil pressure when you fired it back up? Did it have oil in it?

 

Try removing the cam bolt and sprocket. Can you rotate the cam by itself?

 

 

Edited by Stoffregen Motorsports
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You should be able to look under the valve cover and see if the cam is covered in oil or not....  that would tell you if the oil passage is blocked or not....

 

How about the tensioner?

Did you block the chain and tensioner with a wedge?

 

I've seen these engines run with a popped tensioner not sure if it would be enough to stop things from rotating....

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you did the head gasket in the truck using a timming chain wedge or you remove the front cover?

if you removed the front cover that means maybe you drained the oil out o the oil pump.??????????

 

go back to last 2 responses

 

 

find another L20 is the Ezest option

as I would Like a 720 with a L20 motor in it (4x4)

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On 12/2/2019 at 4:37 PM, datzenmike said:

 

Does it have oil in it?

Was the oil light on or off?

 

Try it with the clutch pedal held down? This eliminates a seized transmission.

Cam might seize but there is enough chain slack that the crank would wiggle slightly. Does it?

 

Pull valve cover off and look.

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Sorry, I haven't replied in a while...the holidays... At any rate, I separated the cam sprocket from the cam, and yes, the cam does turn. However, the crank does not. I did notice that there is zero slack on both sides of the chain (with the cam sprocket on the cam). Do you think the tensioner got caught up on the crankshaft or oil slinger or something?

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Did you block the tensioner when you took the cam sprocket off to change the head gasket???????????

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I am thinking the same thing, if the chain tensioner was not held in place it could have popped out when and he started the engine it could have jammed up down at the crank, this would also be a reason for not having any slack in the chain on either side.

Your likely going to have to pull the front timing chain cover off the engine now, this has turned into a major job now.

This is the tool you use when you remove the cam gear from the cam to keep the timing chain tensioner from popping out of position.

post-2004-0-81757300-1358957691.jpg

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Like this...

V4gFyD8.jpg

 

Not this...

TPKjY2V.jpg

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Where is that tool from? Would have been great to have that when I did my head gasket!

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Yes, I used awooden wedge, although I know the tensioner popped out, because I stupidly moved stuff around and allowed it to. I got in too much of a hurry. By the time I got the oil pump on the right tooth, I was too eager to hear it run. How much damage have I done? I have another tensioner I can install.

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You'll have to remove the timing cover and have a look. A good timing chain replacement kit should have the two guides, a tensioner, cam and crank sprockets, chain and both gaskets. I don't know if the water pump and timing cover seals are included. I would definitely replace the cover seal while the cover is off. Try to get a kit that is made in Japan. 

 

Haste..... makes waste.

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Dangit hainz, it's timing, not timming, for the millionth time 😆

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3 hours ago, Stoffregen Motorsports said:

Top ten L series mistakes

 

- not blocking timing chain tensioner

- Hainz spelling of timming

-Not KA swapping it yesterday

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