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Unread 09-11-2009, 11:24 AM   #1
Johngh
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CRD Injector seal change, engine won't start

I've just changed the injector seals on my 2001 2.7 CRD Grand Cherokee. Now the engine won't start. I've taken one of the feed pipes off one of the injectors and it is dry, so Diesel is not coming through. Do I have to bleed the fuel system? If so, how do I do it. Any help will be greatly appreciated.

Thanks
John

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Unread 09-11-2009, 12:49 PM   #2
michiganmaveric
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You will have to bleed the system. I do not know how it is done on your engine though. Wish I could be of more help.
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Unread 09-11-2009, 02:28 PM   #3
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there are a couple of UK's that will show up and tell you "the how".... one's a mechanic I think...
Maybe JeepForums needs a UK section
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Unread 09-11-2009, 03:02 PM   #4
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I hope this helps, but if it is like the Diesel tractor motors that I have worked on, you will need to do each line where they enter the head too I think, but try this first.

2003 jeep grand cherokee 2.7 crd turbo diesel.di... - JustAnswer
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Unread 09-11-2009, 05:48 PM   #5
merlinTec
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Hi
You don't need to bleed it will bleed itself. you will see clear pipes to the pump and should see the fuel moving and also see if there are lots of air in they system. There is no reason it should restart after injector copper washer change (I guess this is what you changed)
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Unread 09-11-2009, 05:58 PM   #6
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Hi
just read the link above forget this, the guy has not idea what he is talking about the 2.7 doesn't have a lift pump.
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Unread 09-12-2009, 02:26 AM   #7
Johngh
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Originally Posted by merlinTec View Post
Hi
just read the link above forget this, the guy has not idea what he is talking about the 2.7 doesn't have a lift pump.


The problem with the car was that some of the injectors were leaking. While I was waiting for this to be done, the front injector came loose and came out of the engine and into the plastic top engine cover while I was driving at about 70mph. I pulled into the layby and turned the motor off.
The front injector came loose due to a botched repair the previous owner had done. The screw had been helicoiled. Once the car was stripped down we saw that a hole had been cut out of the bulkhead under the plastic front wash wiper cover to gain access to the back injectors. The car has done 113.000 miles and this is the second time the injector seals have gone by the look of it.
If the fuel system should bleed itself, then something is wrong as we can see no fuel when the motor is cranked over
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Unread 09-12-2009, 03:03 AM   #8
BigE3
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Quote:
Originally Posted by Johngh View Post
The problem with the car was that some of the injectors were leaking. While I was waiting for this to be done, the front injector came loose and came out of the engine and into the plastic top engine cover while I was driving at about 70mph. I pulled into the layby and turned the motor off.
The front injector came loose due to a botched repair the previous owner had done. The screw had been helicoiled. Once the car was stripped down we saw that a hole had been cut out of the bulkhead under the plastic front wash wiper cover to gain access to the back injectors. The car has done 113.000 miles and this is the second time the injector seals have gone by the look of it.
If the fuel system should bleed itself, then something is wrong as we can see no fuel when the motor is cranked over
im not familiar with these engines but maybe the engine is turned 180 degrees
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Unread 09-12-2009, 07:51 AM   #9
merlinTec
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Quote:
Originally Posted by Johngh View Post
The problem with the car was that some of the injectors were leaking. While I was waiting for this to be done, the front injector came loose and came out of the engine and into the plastic top engine cover while I was driving at about 70mph. I pulled into the layby and turned the motor off.
The front injector came loose due to a botched repair the previous owner had done. The screw had been helicoiled. Once the car was stripped down we saw that a hole had been cut out of the bulkhead under the plastic front wash wiper cover to gain access to the back injectors. The car has done 113.000 miles and this is the second time the injector seals have gone by the look of it.
If the fuel system should bleed itself, then something is wrong as we can see no fuel when the motor is cranked over
Hi
I have seen this done before as you have to drop the engine to get the back 2 injectors out, shocking what some people do. helli coil is a poor repair as the bolt has to be so much bigger and then the clamp that holds the injector can't move/ pivot on the bolt and hold the injector down properly so they leak and the engine gets covered in black muck. Are the injector still ok? can you see any fuel moving in the clear pipe to the high pressure pump? Next thing I would do is get a can of fuel and put the feed pipe that comes off the fuel filter (pipe in the centre of the filter) and place that in a can and see if it will suck that up and then run.
Note: not too fuel will come out of the pump a cracking
Note2: damaged wiring on the ANY injector circuit will stop it from starting so make sure when the injector came loose it didn't damage the plug/ wiring. (new plugs you get from merc as it's a merc engine, Jeep only sell you an engine loom)
Hope this helps.
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Unread 09-14-2009, 02:16 PM   #10
Johngh
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Quote:
Originally Posted by merlinTec View Post
Hi
I have seen this done before as you have to drop the engine to get the back 2 injectors out, shocking what some people do. helli coil is a poor repair as the bolt has to be so much bigger and then the clamp that holds the injector can't move/ pivot on the bolt and hold the injector down properly so they leak and the engine gets covered in black muck. Are the injector still ok? can you see any fuel moving in the clear pipe to the high pressure pump? Next thing I would do is get a can of fuel and put the feed pipe that comes off the fuel filter (pipe in the centre of the filter) and place that in a can and see if it will suck that up and then run.
Note: not too fuel will come out of the pump a cracking
Note2: damaged wiring on the ANY injector circuit will stop it from starting so make sure when the injector came loose it didn't damage the plug/ wiring. (new plugs you get from merc as it's a merc engine, Jeep only sell you an engine loom)
Hope this helps.

Thanks for your help. I appreciate it. We have got the car running. It will tick over all day, but when you try to rev the engine over 2000rpm it shuts down. It will start again no problem, but again after 2000prm it will shut down.
Maybe the front injector got damaged when it came loose and was forced out of the motor. We seem to think it may have got damaged and the engine management system is shutting the engine down. Have you any idea's please.
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Unread 09-14-2009, 04:32 PM   #11
merlinTec
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Hi
would be good to see what fault code you have but best guess would be it's cutting out due to fuel pressure malfunction (below spec). Is there loads of air going down the pipe out of the fuel filter? if you can make a pipe up that will fit on the return on the top of the injector I would measure the amount of fuel returning on each injector at idle. Should be no more the 25mm per injector per minute any more then that the injector is faulty and can't hold pressure. Also submerge the pipe in fuel to see if you are getting loads of air coming out of the injector as this could also mean the injector is faulty and it compression gasses going up the injector and that air will go back into the fuel filter and back round.
Hope this makes sence, best of luck.
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Unread 11-24-2010, 06:30 AM   #12
ksmith38a
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Quote:
Originally Posted by merlinTec View Post
Hi
I have seen this done before as you have to drop the engine to get the back 2 injectors out, shocking what some people do.
Hope this helps.
I have just read this thread with interest as the Chrysler/Jeep dealer has informed me that my engine needs a new injector for cylinder 5 and a new seal for injector 4.
When I questioned dropping the engine they said they would not do this, but access the rear injectors via the scuttle plate. Sounds the same method as above. Apparently dropping the engine etc to do all the work makes it is a 12hr job!

I believe this may have been done already as I know two of the securing screws are missing from the plastic trim under the wipers.
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Unread 11-24-2010, 04:34 PM   #13
Johngh
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Originally Posted by ksmith38a View Post
I have just read this thread with interest as the Chrysler/Jeep dealer has informed me that my engine needs a new injector for cylinder 5 and a new seal for injector 4.
When I questioned dropping the engine they said they would not do this, but access the rear injectors via the scuttle plate. Sounds the same method as above. Apparently dropping the engine etc to do all the work makes it is a 12hr job!

I believe this may have been done already as I know two of the securing screws are missing from the plastic trim under the wipers.

I've just looked at the original post I put up about this problem, can't believe it's just over a year.
As I said in my post, someone cut a hole out of the bulkhead on my 2.7 CRD to get at the injectors. They also botched the repair.
I ended up, having to take my Jeep to a fuel injection specialist who had to bore the cylinder head and insert sleaves into the head to take the injector bolts back to standard, they had to do this on all 5 injectors.
The reason it wouldn't start after my initial repair at the first garage is the throttle intensifier was shot.

Many thanks to Merlin Tech for his help at the time

Once the repair was complete the first 4 injectors stayed trouble free, but the back one under the bulkhead had to go back 4 times under warranty to be fixed, and they never did cure it. To be fair to them they were trying to make the best out of a bad job.
Anyway, the back injector went again, then the passenger side heater packed up, and then the drivers side packed up.
By this time the car had 140.000 miles on the clock, and I wasn't prepared to throw any more money at it, so 4 weeks ago I sold it, and sadly I don't have a Jeep anymore. Which is a shame, despite all the hassle I really did like it.
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Unread 11-26-2010, 04:52 AM   #14
ksmith38a
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Well the dealer went to remove the leaking injector and basically couldn't as there was so much carbon built up. The rocker cover also cracked as a result so I am now faced with having to replace the rocker cover along with all the work already needing done. Not their fault it cracked, who ever replaced the injector and seal last time obviously didn't make sure the seat was clean enough.
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