Engine/Transmission (1994 - 1998) Pictures of KDP tragedy

[KF6GUB]

I tried to attach a picture to my post at TDR. It won't take; maybe it has too many pixels. The picture is of the front gear casing, and clearly it shows breakage. E-mail me, and I'll e-mail you the picture.



What I want to know is the location of the dowel pin. I'm not sure. Thanx. Jim -- email address removed --

 

[HoleshotHolset]

Unless you link from another www storage URL, you are limited to 32KB for picture attachments on the TDR.



32KB isn't much, but you can size any picture down and still be able to make out what it is you are trying to emphasize.



Matt

 

[KF6GUB]

To: Matt

I don't think I know how to do that. Can you be specific? I've made it as small as practical. Thanx. Jim

 

[WDaniels]

Gabby,

The location of the down pin is... as you are looking at the case, just above the cam gear and to the left of the injector gear is a series of 3 holes. The top one is the KDP hole. The new KDP is tapered and will start easily. Mine almost pushed in by hand. Make sure on the new gear case it is a necked hole for the KDP. It is the newer 98. 5 and up case.

I too am just getting mine back togeather after the KDP went through the top of my case. While I had mine down and the cam out I went ahead and got a Piers Cam and put it in. I figured that as long as I was down there I might as well do it now. I sure don't want to do all that again to change the cam.

WD

 

[illflem]

Arrow is pointing at the hole the pin goes in Your case was probably cracked just off the lower left side of the picture.





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[KF6GUB]

Thanx, illflem

Your picture and arrow set me straight! Jim

 

[Tardog]

WDaniels



Did you get your truck up and running? Hows the cam? any other mods while your truck was down. Hope the repairs went well.

Cheers,

 

[KF6GUB]

Took another look

Went back this afternoon to my truck sitting at the dealer to look at the damage, and this time I knew the location of the KDP thanx to illflem's picture and arrow. I stuck a rod in the hole to find out if anything was in there. I could see an "obstruction", which did not appear to be broken off. It was back in the hole about 1/4 inch. Is that the dowel? Maybe mine has not moved? What do you think? I really hate like hell for the dealer to put this truck back together without repairing the dowel issue, which supposedly caused the breakage in the first place. Thanx. Jim

 

[HVAC]

The Carnage Is Ugly

If there are folks in the NorCal area that need to get the preventative measures taken care of please contact me, or Blair Pine, or the RamRunners club.

 

[illflem]

Gubby, the pin is about a 1/2" long and when fully pounded in is flush or slightly recessed in the hole in case.

 

[KF6GUB]

T0: illflem

If that's the case, it's definitely busted off. Jim

 

[WDaniels]

Tardog,

Just got the truck running about 15 minutes ago. Now I got to take it in and get it timed for 15 degrees BTC and I think the pump lift is 5. 1mm for that amount of degrees. I don't have the tools to do the pump. You think that parts for the Air Force are expensive. Try cummins. 638 smackierenos for the 6 piece kit to time the pump.

WD

 

[KF6GUB]

What good is it?

... the pin, that is. Since it's supposed to protrude into the block. what's it do? If it's not there, what are the consequences? Thanx. Jim

 

[HVAC]

The problems arise when the pin works itself loose and falls into the gears in the timing cover. It normally blows the side out of the timing cover on the passengers side of the engine when it falls out. Other then that, it's not necessary to have one in the block. It's strictly an assembly aid, or so I was told. Helps to align the gear cover onto the block. There are several bolts that actually secure the cover to the block.

 

[WDaniels]

I have been told that the pin is absolutly necessary to have in the block and case. They were fuzzy on the whyfores and wherefores.

WD

 

[illflem]

The $1 pin is absolutely necessary. If you install the case without the pin and the bolts just finger tight you will see the play in the case from the bolt hole slop, it's quite a bit. Pin in and it tightens right up. Though I've never seen it my understanding that without the pin there is the potential for injection pump and crankshaft bearing and seal damage due to misalinement. Might be something for the folks who have only epoxyed their cracked cases to think about. I see absolutely no reason to remove the pin in order to keep it from coming out. Besides if it's loose enough to pull it out it already fell out, they're an extremely tight fit.

 

[R.ebel]

KDP

Along with all the possible problems that Illflem described, leaving the pin out has the potential to affect injection pump timing.

 

[KF6GUB]

I want to see it.

I know where the pin is supposed to be, thanx to illflem. I would sure like to see one in position. I thought it was supposed to be protruding to the inside of the block. Apparently not. I would sure like to tell my mechanic something constructive. I'm concerned that the dealership may not know. The service manager had said that they've gotten some pointers from the folks online. Thanx. Jim

 

[illflem]

Tried to find a picture of the pin but all have a fix done to them. The bolt threads in the center of this picture is the bolt from a jig fix. The bolt head to the right of it is the one used to hold down the tab in it's fix. The kdp is in it's place. Never heard of a kdp breaking in half, personally don't think it's possible. Maybe it's just gunk in the hole?



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[KF6GUB]

I've got it now.

I just got my new issue of TDR, which referred to an article in issue #33 by Joe Donnelly, describing his experiences with the KDP. I've got it now: I understand what the KDP was designed to do. And then it falls out.



I'm going to the dealership tomorrow morning to let them know I saw no dowel pin in my engine where there is supposed to be one. I'll have a photo with me.



Thanx everyone. Thanx illflem. Jim