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  #1  
Old 02-21-2018, 12:14 AM
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New 315 nozzles and starter for ‘Stormcloud’

Eight new Italian FIRAD DN0SD315 nozzles were obtained from two separate Lithuanian e-Bay vendors.
Five were sent to greazzer ( https://dieselfuelinjector.guru/ ).
He supplied a matched set of Bosch German injector bodies and pop balanced them expertly as always.
He rebuilt my last two sets of injectors with German Monark DN0SD265 nozzles I purchased from Kent at mer*****source.
Once I get two more FIRAD 315 nozzles, I'll have greazzer rebuild another set of five injectors with 315 nozzles for ‘Desert Rose’.



All the injector wells in ‘Stormcloud’ were carbon packed.
The number one injector was the worst of the lot with a lot of wet gummy residue.
The number five injector had a little gummy residue and the remainder were covered with normal dry soot on the nozzle faces.
The injector wells were cleaned with a brass bristled bottle brush to safely remove the carbon without damaging the heat shield sealing surface.



Before removing the old injectors, I had adjusted the valves and had done a diesel purge with LubroMoly.
My plan was to check compression before swapping in the new injector set.
I set up the compression gauge on injector well number one, turned the key and…nothing happened.
No click, no starter engagement, and no headlights as well.



Previously I had cleaned the fuse box connections, battery terminals and cable connectors with DeoxIT-D and DeoxIT-S.
Suspecting poor electrical connections in the starter circuit, I used DeoxIT-D and DeoxIT-S on the negative cable to chassis ground,
on the alternator harness connectors at the alternator and the junction block, as well as at the starter solenoid.

Voila, the head lights worked and the starter would engage with the key.
Being late, I called it a day.

Attached Thumbnails
New 315 nozzles and starter for ‘Stormcloud’-valve-adjustment.jpg   New 315 nozzles and starter for ‘Stormcloud’-clean-valve-cover-mating-surface.jpg   New 315 nozzles and starter for ‘Stormcloud’-old-injectors-1-5-lto-r-.jpg   New 315 nozzles and starter for ‘Stormcloud’-rebuilt-injectors.jpg  
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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022
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  #2  
Old 02-21-2018, 12:15 AM
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The next morning attempted to crank the engine and you guessed it…no starter engagement.
I did get a click from the glow plug relay and the head lights worked fine.
Jumping the starter solenoid directly produced no activation of the solenoid.
I figured the solenoid was sticking, so out came the starter.



One of the two starter bolts had been installed gorilla-tight but finally broke free,
only after I climbed into the engine bay to get more direct pulling force on the ratchet handle.

On the W116 300SD, the starter removal from below requires a bit of disassembly.
A two-by-four, strategically placed between the PS shock tower and the turbine housing,
let me shift the engine over just enough to remove the starter from above.



With the starter out, the reason the solenoid wouldn’t activate was plainly obvious.
The braided copper cable going from the starter to the solenoid was touching the bare
metal of the motor housing just enough to cause intermittent failure of the circuit.
Repositioning the braided copper cable to clear the motor housing enabled the solenoid to engage properly.


I consulted with my independent mechanic.
He recommended I replace it with a Bosch rebuilt starter.
He explained that the early OM617s initially came with weak solenoids with a high failure rate.

Bosch upgraded the solenoid specifications which solved the problem.
He said many aftermarket rebuilders don’t use the correct higher spec solenoid and the rebuilt starters fail prematurely.
I’ve read where the high current draw from a poor solenoid can also cause early failure of glow plug relays and neutral safety switches as well.
A new NSS was just installed (to pass the lamp inspection – the reverse lights were out from the failed NSS),
and the glow plug relay was replaced due to a melted housing and a melted clip on cover.



A rebuilt Bosch starter with the good Bosch solenoid was ordered (at cost)...problem solved.
The core was not accepted as rebuildable by Bosch, so I did end up having to pay a $75 core charge after the fact.
Well, now I have the old one which still functions, unless some one needs a cheap replacement starter??
Send me a PM if you need my old starter.



With the new starter I was finally able to get compression reading and the results are pretty decent:
cyl-1 400psi, cyl-2 360psi, cyl-3 360psi, cyl-4 370psi and cyl-5 360psi.

Took her out for a spin with the new 315 injectors and she seems a lot peppier.

Next maintenance tasks are glow plugs and flex discs.
I have new French Bosch Duraterm glow plugs (Bosch 0 250 201 039) and front and rear MB flex discs (MB 126 410 02 15) on hand.
I’ll post more updates as they get done.
Attached Thumbnails
New 315 nozzles and starter for ‘Stormcloud’-old-bosch-starter-non-bosch-solenoid.jpg   New 315 nozzles and starter for ‘Stormcloud’-rebuilt-bosch-starter-bosch-solenoid.jpg   New 315 nozzles and starter for ‘Stormcloud’-installing-new-starter.jpg  
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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

Last edited by Alec300SD; 02-21-2018 at 12:33 AM.
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  #3  
Old 02-21-2018, 01:08 AM
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Fine work good sir!
Be cool to do before and after vids of the engine running.. That sure is a tight fit for that starter, bet you couldn't slide a quarter between that gap!
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  #4  
Old 02-21-2018, 02:02 AM
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On this thread Getting 'Stormcloud' roadworthy, I posted a cold start video clip from 12-03-2017.

https://www.youtube.com/watch?v=cICgL3WVnPk&feature=youtu.be


That 'before' video was taken prior to the valve adjustment, diesel purge and 315 nozzle upgrade.
If I have time tomorrow morning before going to work I'll take an 'after' video and post it here.

Definitely couldn't even fit a dime, much less a quarter, in the gap.
The starter was wedged in there pretty tight.
Glad I came up with a simple solution to remove the starter from its 'cage'.
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79 W116 300SD 'Stormcloud' RIP 04/11/2022
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  #5  
Old 02-22-2018, 12:59 PM
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What was your reason for the change from the Monark nozzle to the FIRAD?
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  #6  
Old 02-22-2018, 03:02 PM
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'Desert Rose' currently has Monark 265s, and I have a spare set of Monark 265s harvested from 'Rena 2.0'.

When I got 'Stormcloud' I had no history, but I could tell the injectors were old worn out rebuilts that need replacing
(black plastic bands cover the original bar pressure rating stamped into the top halves of the injector bodies).

I could have used the spare set of Monark 265s on 'Stormcloud', but I plan to increase fueling beyond stock on both 'Stormcloud' and 'Desert Rose'.

I've read that 315s supposedly have a greater flow rate with lower pintle lift than 265s.
New om617a injectors choice

The only 315s I found when I searched online were fairly pricey Bosch nozzles, super cheap Chinese nozzles, or reasonably priced FIRAD nozzles.
I decided to give the FIRAD nozzles a try.

Tomorrow I will post an 'after' video clip of 'Stormcloud' running with the new 315s.
(the camera battery died this morning and is being recharged)
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79 W116 300SD 'Stormcloud' RIP 04/11/2022
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Old 02-23-2018, 10:46 AM
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The 'after' video clip...as promised.

https://youtu.be/mCyR2yB1wbM
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79 W116 300SD 'Stormcloud' RIP 04/11/2022
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Old 11-07-2019, 07:58 PM
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Are you happy with the Firad Nozzle performance? had any issues since the install?

I am thinking about using them as I can seem to find a better option but havent seen real-world reviews yet.

Also link? I see the sd314 on idparts but did you use ebay.eu or ebay.uk ot somewhere else?


Thanks for the write-up
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Old 11-07-2019, 08:21 PM
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Oh, wow. I've never replaced a starter on these cars from the top. I've always done it from underneath.
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  #10  
Old 11-09-2019, 11:50 PM
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Quote:
Originally Posted by rjz5400 View Post
Are you happy with the Firad Nozzle performance? had any issues since the install?

I am thinking about using them as I can seem to find a better option but havent seen real-world reviews yet.

Also link? I see the sd314 on idparts but did you use ebay.eu or ebay.uk ot somewhere else?


Thanks for the write-up
So far, I'm happy with the FIRAD DNOSD315 nozzles installed in 'Stormcloud'.
The injectors were rebuilt and balanced by greazzer.
Seat of the pants performance is much better than with the prior worn nozzles and mis-matched injector bodies.
Unfortunately, the PO had swapped in a NA MW IP at some point, so performance is still sub-optimal.

'Desert Rose' will be getting (rebuilt by greazzer) matched injectors with BOSCH DNOSD315 nozzles,
and an '85 MW IP with 7.5 Dieselmeken elements installed by Benzforce.
Just need to finish up some rear suspension work this weekend.

'Stormcould' will be getting the old turbo MW IP from 'Desert Rose', and better performance should be achieved in both cars when the IP upgrades are done.

Eight FIRAD nozzles (four via Lithuania X2) and four BOSCH nozzles (via Germany) were purchased from the US based eBay.com.
I would have used the three new FIRAD nozzles I have on hand for for 'Desert Rose', but I couldn't source the addtional two I would need.
Instead of having nozzles from different manufacturers, I purchased 4 BOSCH nozzles from a German seller and greazzer supplied the fifth BOSCH nozzle.
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79 W116 300SD 'Stormcloud' RIP 04/11/2022
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  #11  
Old 11-10-2019, 09:52 AM
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Quote:
Originally Posted by rjz5400 View Post
Are you happy with the Firad Nozzle performance? had any issues since the install?

I am thinking about using them as I can seem to find a better option but havent seen real-world reviews yet.

Also link? I see the sd314 on idparts but did you use ebay.eu or ebay.uk ot somewhere else?


Thanks for the write-up
I'm running the Firad DS0SD314 nozzles in my 350SD. The 314 is the nozzle shown in the EPC for the OM603 engines and is a suggested substitute for the OM617 turbos. Not sure what the difference is between the 314 and the 315 other than the 314 being cheap and super easy to get a hold of. I've put a few thousand miles on my nozzles so far and have been pleased with them. I've considered buying a spare set just to have on hand when they go out of production.
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  #12  
Old 12-03-2019, 12:43 PM
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if anyone is thinking about picking up a set od the SD 314 FIRAD nozzles they are on sale at EYE Dee parts with 5$ express shipping today. my order of 5 with washers came to 134.$ supposed to be a stock for om606 and an upgrade to 617 ...

thanks for the help in the decision!

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