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Dieselfuture

95 12 valve busted gear case

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Dieselfuture    288
Dieselfuture

So, buddy of mine that I work with got a 95, 4x4, auto supposedly built for pulling trailers , 220k 8' box, regular cab. Title says gas, also brake booster doesn't seem to be hydraulic like on mine, it's round like on a gas truck but no vacume lines going to it or place for it. Anyhow it was leaking oil out front someplace and guy that was selling it just got it and decided to sell it, so it's a cat in a bag. I looked at it with him and gave him my :2cents:. For $2900 it seemed like it was fixable and drove ok accept it seems to shift to od too soon and when flored doesn't kick down and seems to be hunting lock unlock. Front cover was soaked and dirty, seller said it was front seal or so he was told that by po. I said right of way that it seems like oil is coming from top someplace but who knows could be flinging of the crank upwards. Now that he's working on it he found this, see picture. His question, how much is he looking at to fix crap inside assuming worst case scenario. I'll update pictures as he sends them to me. Trying to get him to join this site, but I think he's already thinking of selling it. 598df29c9c27c_2017-08-1113_06_55.jpg.3b9cc2599ad9ef1cec42b43862c670bc.jpg

Edit: all gears seem fine, pin is missing, in the oil pan I guess. How important is it to put new pin in, it it only for assembly and now that the case is in place it will be fine or? On the case it self  I'm thinking jb weld? He feels better now that the gears look good. 598df7de3ad62_2017-08-1113_26_40.jpg.27d55b724762c96713563a67af4775c7.jpg

Edited by Dieselfuture

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dripley    1,083
dripley

No expert here but if it is the timing case you have to pull the cam to replace it. I dont think the 12v are any different from the 24v on that one. Just my uneducated observation.

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Dieselfuture    288
Dieselfuture

He's going to jb weld it, we'll see how it goes. What about the pin should he get one or leave it out.

And anyone knows why tranny doesn't kick down from od and seem to hunt lock unlock. 

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JAG1    774
JAG1

You don't need another KDP pin and the trans Hunts over the gears usually because of A/C voltage noise from an alternator going bad. Do search on this site to understand excessive AC voltage and how to test for it

Edited by JAG1

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Cowboy    305
Cowboy

I'd get a new pin, It keeps all the gears aligned properly.

 

'95's came stock with vacuum boost brakes.  The connection should be here. 

wmbrake_boster_vacuum_line_408488.jpg

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JAG1    774
JAG1

Cowboy, There must be something I don't understand... how is it that he should get a new pin when only the factory uses it during assembly? Are you saying he needs it to help line up the gears and afterward he should tab the KDP?

 

I just don't understand.. are you saying line up the gears for timing to each other? I thought they had marks to go by.

 

Thanks in advance.

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Cowboy    305
Cowboy

These diesels can rattle a house down.  The pins job is to keep the timing case 'centered' on the block, due to the injection pump and vacuum pump being bolted to the case, if it shifts, the gears will no longer be in alignment with the cam gear which drives them.  Because of all the weight hanging off the case with a 50lb injection pump and the engine vibration, it's not unlikely.   The handful of bolts holding the timing case to the block are also known for backing off due to engine vibration.  So it's a good idea to take them out one by one and red locktite them.

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JAG1    774
JAG1

I gotcha. Thanks for the explanation, :cheers: A lot better than being in a confusenation..

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jlbayes    258
jlbayes

1997 was the first year for hydraboost on the 12v.

 

I'll 2nd replacing the pin.

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jlbayes    258
jlbayes
3 minutes ago, Mopar1973Man said:

 

I say replace the gear case and the pin.

 

That as well as bad as it is broken.

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Dieselfuture    288
Dieselfuture

He's getting a pin and too cheap to get a case, he got it jb welded and feels pretty confident in his job, time will tell. Also putting in a new seal, any tips for him on doing seal, post something here. He has a link to this thread and been checking it. He also says thanks for the help. 

@jlbayes what fuel pressure should he be seeing to p7100, all stock at the moment, but he's been reading things about boost elbows and fuel plates.

Edited by Dieselfuture

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Haggar    124
Haggar

 

" ...he got it jb welded and feels pretty confident in his job..."

 

Sorry, but did anyone else spew coffee all over their monitor?

 

Couldn't help it....  it just slipped out.

 

Tell him that made my day!!! hope it lasts forever!!

 

Hag

Edited by Haggar
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Dieselfuture    288
Dieselfuture

Believe me I tried, he has his ways and who knows it just might last.

His determined to get it done today, got these parts from local cummins, $6 kdp, $37 seal, making a tab now,  jb weld priceless....

5991f21c4020f_2017-08-1413_48_03.jpg.dcbb7bb6a91a67f5999ce933e2f7f10c.jpg

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jlbayes    258
jlbayes

It is something like 15-25psi. I don't have the fsm in front of me at the moment.

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Cowboy    305
Cowboy

17-22 psi idling, 25-35 psi 2500 RPM no load is the spec.  I got mine at 35-40psi because it gives me the warm and fuzzies.

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