XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

89 xjs no start

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  #21  
Old 06-10-2013, 01:47 AM
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Originally Posted by smachell
valve is visible in each one. I don't know if it is the exhaust in each case, but definitely in number one. I presume stuck down because of time, any tricks to get the valve freed up without pulling the heads? car has 18,000 miles on it.
Are you 100% sure, I have a feeling that the pistons would have bent the valves by now if they were all stuck open?

Greg
 
  #22  
Old 06-10-2013, 07:30 AM
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-4 on one bank, 2 on the other.

-I filled the #1 cylinder with Marvels, ran out the tail pipe.

- What is the proper way to " pickle" the motor?

- Am I mistaken, or didn't I read that this is a non-interference motor?
do I still have bent valve potential?


thanks!

Steve.
 
  #23  
Old 06-10-2013, 07:33 AM
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Greg

you may have a point, I haven't had help when rotating the motor, just multiple partial rotations by myself, but each partial rotation the valves
seem to be in the same position, and visible thru the plug hole.
I'll get the wife at noon to roll it over while I watch each one to verify.

Great Help, thanks!

steve.
 
  #24  
Old 06-10-2013, 12:52 PM
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Had my son turn the car over at lunch, the valves are not moving, no clicking, doesn't sound like any other internal contact going on.

Can see the cylinders with compression, valves moving smoothly.

Has anyone had success lubricating thru the cam oiler tube to loosen the
stuck valves?


Thanks, Steve.
 
  #25  
Old 06-10-2013, 02:10 PM
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No compression on one entire bank sounds very suspicious. Sure you might have valves stuck from sitting, but all of them on one side? That suggests to me that moisture has somehow entered the engine and my first thought would be a blown head gasket.
It is relatively easy to pull the intake manifolds off and pull the valve covers. You'll be able to visualize the cam and lifters, and look down the intake ports to see the intake valves.
 
  #26  
Old 06-10-2013, 03:49 PM
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probably heading that way.

4 of the valves on the B bank not moving

2 of the valves on the A bank not moving.

thanks!

Steve.
 
  #27  
Old 06-11-2013, 09:44 AM
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Is the coolant levels all the way up? If so, I suggest borrowing a cooling system pressure tester and pressurizing the system to see if anything leaks into the cylinders.

If this is only stuck valves you might get lucky and free them up by spraying them with penetrating oil through the ports and tapping on them lightly with a long screwdriver and hammer. The shock and rebound from the valve springs could be enough to loosen them up.

If that doesn't work you have to start thinking about pulling the heads. I had blown headgaskets on mine when I got it and I found it was cheaper to buy a used engine than it was to fix the original. Parts cars are still plentiful and I just picked up another '83 with a good motor for cheap money.
 
  #28  
Old 06-12-2013, 10:42 AM
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will do on the pressure tester, fluid is topped out.

I'm like you I have to believe that if I can get fluid up around the stem

and tap, the spring will want to rebound.

thanks, steve
 
  #29  
Old 06-12-2013, 07:03 PM
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Too pickle a motor you completly fill it with fluid (kerosene) in your case i would tap the valves fiest if they sit tight drop the exhaust and plug it up then fill it through the intake until ful give it some time too losen it up. Buy a gallon of wD40 and add about half too the mix your pouring in or us the mystery oil .yes its a zero tolerance motor as far as Iknow
 
  #30  
Old 06-13-2013, 11:20 AM
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Best way too check is take the valve cover off! put a bit of playdough in between the spring and see if it compressed
 
  #31  
Old 06-13-2013, 12:50 PM
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Great information.

I'm going to do just that, I had the same thoughts of soaking the motor.
I'll let you know how I make out.

Thanks!!

Steve.
 
  #32  
Old 06-13-2013, 10:35 PM
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anytime steve! just dont try too start it like that! give it an oil change and then give it a try. once it sets for a bit take the valve cover off and tap the valves it should come lose
 
  #33  
Old 06-14-2013, 09:03 AM
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Ballpark timeframe??

1 week +/- have 6 of them stuck.

Steve.
 
  #34  
Old 06-14-2013, 10:04 AM
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yea give it about a week make sure its completly full feed it through the intake if you must also .and through the spark plug holes. fill her till she cant take no more
 
  #35  
Old 06-17-2013, 07:19 AM
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excellent, will do!

I'll keep you updated.

thank you.
 
  #36  
Old 06-27-2013, 06:18 PM
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hey hows it coming??? dont leave me hanging!
 
  #37  
Old 06-28-2013, 06:48 AM
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Trying to be patient!

I finally got my exaust leaks to stop seeping.
Filled thru all plug holes, then pulled injectors, and used as fill points.
i'm topping off daily, not much but enough to see movement.

Going to let it " pickle" thru Monday, then drain.
I'm goint to roll it by hand to see if I have valve movement, should
give me decent picture.

does this sound typical?

Many thanks.

Steve
 
  #38  
Old 06-29-2013, 11:10 AM
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yes thats typical the exhaust is usually the issue when filling it. pull the valve covers and turn it by hand make sure everything is working properly.once the valves come loose and you drain it change the oil several times after .it will need a flush!
 
  #39  
Old 07-12-2013, 01:11 AM
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hows it coming?
 
  #40  
Old 07-23-2013, 08:53 AM
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Sorry for the delay, been out of pocket.
Drained the " pickle" fluid, rotated by hand no movement.
Pulled valve cover on the side with 4 stuck valves, can see exactly wich
valves are stuck, cap is depressed for each valve.
poured some fluid on top of the cap, by morning had seeped in.
I'll try to attack from the top, give it a bit, then pull head if need to.

Thanks!!

Steve.
 


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