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CRD #5: Project begins
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=84167		 Page 1 of 1
Author:  Jay ne Ohio [ Sat Mar 05, 2016 6:18 pm ]
Post subject:  CRD #5: Project begins
I've added a 5th CRD to my fleet! Decided to buy a project again and try to get it going. Previous owner was a member here and posted about it in January. Here is a link to his thread: viewtopic.php?t=83790

Many guessed a glow plug. Some guessed it was a dropped valve. I took the head off and here is what I found:

Image

As you can see, the valve snapped off and is embedded in the piston. Here is what the head looks like:

Image

And of course, the cylinder liner could not escape without a couple scratches:

Image

I have a spare engine. I can swap engines or repair this one. Have not decided which way to go yet. Can I pull the piston without removing the engine?
Author:  rankom [ Sat Mar 05, 2016 7:40 pm ]
Post subject:  Re: CRD #5: Project begins
Jey you know the answer , you need to pull engine out. but I'm glad that i pulled cylinder head off when i got my kj 100 miles on it , so i just did preventive maintenance ,rockers tb wp kit , but i want to do it properly to see pistons and liners and send cylinder head for valve inspections and cleaning. as i asked questions many times why this engine dropping valves ? we know the answer ,, but my own insurance is very cheap , yes i had to spend some money for head gasket kit and machine shop fee , but that is just my old school again ,, rip it a part and look inside good
Author:  Mike92104 [ Sat Mar 05, 2016 9:32 pm ]
Post subject:  Re: CRD #5: Project begins
Jay ne Ohio wrote:
I've added a 5th CRD to my fleet! Decided to buy a project again and try to get it going. Previous owner was a member here and posted about it in January. Here is a link to his thread: viewtopic.php?t=83790

Many guessed a glow plug. Some guessed it was a dropped valve. I took the head off and here is what I found:

Image

As you can see, the valve snapped off and is embedded in the piston. Here is what the head looks like:

Image

And of course, the cylinder liner could not escape without a couple scratches:

Image

I have a spare engine. I can swap engines or repair this one. Have not decided which way to go yet. Can I pull the piston without removing the engine?


I don't think you can, and I'm not sure it would be worth it if you did.
Author:  dhenderz [ Sat Mar 05, 2016 9:38 pm ]
Post subject:  Re: CRD #5: Project begins
So we have another dropped valve to add to a list that appears to be growing. I had exactly the same problem, but on #3 cylinder. I am really starting to question whether something is happening to the cause these valve stems to become weak/brittle and break off.


Good luck on your repair. I ended up dropping $3600 to get mine back on the road. But that also included $500 for a new CP3 and $180 for a new MPROP, $125 for a new fuel head & $130 for a lift pump. None of the was required, but spent as I was trying to root cause the problem step-by-step (or $ by $). I did however get a used cylinder head for $100 and a used piston/sleeve for $100.

PS - yes, you need to pull the engine. The alternative requires dropping the entire front suspension/axle to get access to the bottom of the engine. If you have a hoist pulling the engine is easier.

Part Qty Price Total
Cam gear holding tool 1 $54.00 $54.00
Cam locking tools 1 $30.00 $30.00
Lift pump 1 $130.00 $130.00
Fuel head 1 $125.00 $125.00
CP3 1 $500.00 $500.00
MPROP 1 $180.00 $180.00
Piston & connecting rod 1 $153.00 $153.00
Connecting rod bolt 2 $1.60 $3.20
Turbo oil return bottom seal 1 $6.99 $6.99
Cylinder head 1 $150.00 $150.00
Valve stem seals 1 $29.95 $29.95
EGR delete kit (stage 1 & 2) 1 $289.90 $289.90
Inspect injectors 3 $40.00 $120.00
Injector 1 $435.00 $435.00
Rockers 3 $29.95 $89.85
Rear main seal 1 $44.95 $44.95
Turbo intake tube 1 $61.20 $61.20
Gasket set with bolts 1 $239.95 $239.95
Crankshaft position sensor 1 $50.00 $50.00
Lower rad hose 1 $57.95 $57.95
Timing belt tensioner 1 $99.95 $99.95
Timing belt idler pulley 2 $38.50 $77.00
Fan clutch 1 $38.79 $38.79
ARP studs 2 $153.30 $306.60
Rebuild/test cylinder head 1 $367.00 $367.00
$3,640.28
Author:  flash7210 [ Sat Mar 05, 2016 10:24 pm ]
Post subject:  Re: CRD #5: Project begins
Quote:
So we have another dropped valve to add to a list that appears to be growing. I had exactly the same problem, but on #3 cylinder. I am really starting to question whether something is happening to the cause these valve stems to become weak/brittle and break off.


Was yours an exhaust valve?
Looks like the one in this thread is.
Author:  Efren_Hinojosa [ Sat Mar 05, 2016 11:19 pm ]
Post subject:  Re: CRD #5: Project begins
Makes me wonder if i should buy all new valves this summer

Sent from my SAMSUNG-SM-N920A using Tapatalk
Author:  dhenderz [ Sun Mar 06, 2016 7:50 am ]
Post subject:  Re: CRD #5: Project begins
Efren_Hinojosa wrote:
Makes me wonder if i should buy all new valves this summer

Sent from my SAMSUNG-SM-N920A using Tapatalk


I seriously considered the same. But exh valves are $18.95 and int valves are $14.95. That's another $300 on top of an already expensive build. But honestly my wonder/concern continues to grow on why these valves seem to just randomly snap. I think its is time to start a thread dedicated to discussing this subject. Don't want to hijack your thread....
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