Vegan

Getting a new engine

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Shop says engine has no compression and rings are probably bad.  Does anyone know a good place to buy a rebuilt one?  94 ls400

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How many miles on it?  New timing belt could be broke, or slipped and or some how out of time. Did it smoke a lot before this problem? Did it run real good before this problem? You really need to find a shop that knows how to work on cars without needing a scan tool. Old cars are not for New mechanics.

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Timing belt was just replaced.  It was running great and then wouldn't start all of a sudden.

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Sounds fishy. Motors do not go from running great to no compression over night. Most likely is some kind of mistake or faulty component when changing belt.

And the belt has broke ur jumped teeth.

From what I heard that is often catastrophic with bent valves and no compression on several cylinders. The good news is that these motors are very long lived so if you buy a used one it is often in good shape. 

 

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94 is non-interference so the engine will not be damaged by a broken belt. I would look for another engine on www.car-parts.com 

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Yes you are right.  non interference motor. hence easy fix if belt has skipped.

If you take comp test about half of the cylinders should have no comp if the timing belt is gone or badly slipped.  Depending on which valves are open.

Still a motor does not go from good to bad in a short time if it has oil and water.   

 

Mikael

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These are special engines. The highly desired 4 Cam 32 valve V-8 featuring a 6 bolt main bearing. As others said, they don't just run and stop and be dead without noise and smoke. Is the mechanic a professional or shade tree?

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Yes you are right. I did not think it through.  If cams have stopped moving in a non interference motor due to belt broke (all valves ok but not moving) it is likely that about 4 out of 8 cylinders are with one or more valves permanently open and the other with them shut.  All cylinders will show close to zero compression since the ones with valves closed will not suck in any air to compress and the one with one or two open obviously will not show any compression.

 

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I don't think its a deal where another engine is needed. Unless you have 400,000 miles on it. A broke timing belt is the likely culprit. The new one was likely a bad installation job or ?  Your key to this whole deal is what you said. That is was running great then all the sudden it won't.

You really need someone else to check it out. California is full of car nuts you shouldn't have a problem finding some one to look at it.

It takes less than a half hour to check the timing belt.

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