4age 20v silvertop pistons locked help!

[1991celi]

Alright, i swapped a 20v silvertop into my celica this fall to find out it was seized. this spring i finally got around to tearing the motor apart and unseize it. I managed to unsieze it but i have 2 major concerns that i was hoping that you guys could help me out with.

1. the motor will spin but stops abruptly when piston 1 and 4 hit tdc. (going to take the oil pan off tomorrow see whats up)
2. piston 2 (i believe) is higher than the rest at tdc.
This is the first time i have ever torn an engine apart so hoping i could get the help of you awesome people at club 4ag =)

[totta crolla]

All will be revealed when you remove the sump.
I would say that the piston that is higher than the rest is at the correct height.
Likely the big end bearing shells are completely knackered on the 3 "low" pistons.

[1991celi]

i was wondering. can i even get at all the oil pan screws from under the car or would it just be easier to take the block out.

[totta crolla]

I think the engine will need to come out as there is a very real chance the crank will need to be removed,
certainly if the engine seized on the crank rather than the pistons.

[1991celi]

yeah, ill be taking it out and checking it out. but it disp[leases me that an importer would send an engine like this...

[carbd7age]

Seems like there's an epidemic of junk engines coming from importers. That's a quick way for a company to make a buck, buy a junk engines for nothin then sell it as good and rip you off. That sucks man. Pull it out and post pics. Maybe someone has some parts you need.

[1991celi]

yeah man, i am just finishing up my semester in college so i will have tons of time to take it out.

[yoshimitsuspeed]

I think this is a good lesson for people getting engines, be it from a JDM source or even a junk yard or other USDM motor.
One thing that I think should always be done while it's still sitting on the shipping palate and hopefully still has a trans on it.
Hook up power to the starter and do a compression test. This will at least tell you it's not seized and that it has good compression.
I didn't think about this on my motor till I had already pulled the trans and gotten it in the shop. Fortunately I got lucky with mine.
Once the motor is in the shop/garage pull the pan and main/crank caps and plasticgauge each one and inspect the bearings.
Pull the valve cover and inspect the top end as well as you can. Pulling cam caps would be a good idea.
At least now you have a decent idea of the overall condition of the motor and close to the ship date. If you send the a pic of toasted bearings two days after it shows up on your doorstep you will have a lot better luck getting the seller to work with you.
1991celi that really does suck. I would try to send pics to the seller and try to see if they will give you some money back or something. They probably won't be too compliant at this point though.
I agree that sellers should inspect and be confidant of what they are selling but it is just as much our responsibility to inspect and be confidant in what we are buying.

[1991celi]

my lesson was learned lol. but i got this motor from jdmstar and i will try to contact them. but the "warranty" is up so idk

[morgan]

i have a feeling this isnt going to turn out good. the pistons in the pic, top most one is cyl.#1. when #1 is down, #3 should be down too, and #2 & #4 will be up at that time. #2 or #3 seem to have a problem

[carbd7age]

Nah Craig you got that backwards. 1 and 4 go up together, 2 and 3 stay together. Unless 20v's are different and weird.

[morgan]

yeah, youre right. 20v's are the same as 16v's. in any sense, both pistons should be level with eachother, not so much in that pic. its been a while since i had a 4ag open...

[carbd7age]

Haha yeah that pic made me sad inside! 'Sposed to look like this:

[jdm86gtz]

If it's locking and the piston is shy of the top deck it's probably a bent rod.

[1991celi]

yeah, i was thinking 3 had a bent rod? because 1 and 4 are the same height and both lock right before they reach the top and 2 reaches the top just fine.

[1991celi]

So I figured out what was causing the stoppage of the pistons. well here it is. Do anyone have a single piston rod they are willing to sell? haha

[carbd7age]

[8Ton]

And that Is why I call BS when people claim the stock rods are cast. Any signs of corrosion in that cyl? I would suspect that the motor hydro locked before it was imported...

[1991celi]

there is some corrosion near the top but very little. you are probably right.

[Army Fork]

Nobody has cast rods in years, it's actually cheaper to forge them on a large scale. You can take a steel blank and smash it into the rough shape in a few short strikes, then it's all the machining you would have to do anyways with a cast part. On top of that, cast is generally **** for rods due to cast materials brittle nature and lack of elasticity.

Also, damn son.

[Army Fork]

Just buy some new rods. Probably cost you $500 for a nice set of Crowers and you'll never bend them.