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Search: Posts Made By: Kevin Johnson
Forum: Diesel Discussion 02-18-2016, 10:20 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I do not have time at the moment to review all...

I do not have time at the moment to review all the comments but this might be helpful. I was told by an enthusiast in a position to know that Mercedes management decreed to engineers that the...
Forum: Diesel Discussion 09-23-2012, 09:33 AM
Replies: 21
Views: 3,778
Posted By Kevin Johnson
Degrease thoroughly as mentioned then put in a...

Degrease thoroughly as mentioned then put in a fluorescent tracer in the oil and examine the general areas with a black light after brief intervals of running the engine. The glowing will be easier...
Forum: Diesel Discussion 09-23-2012, 09:21 AM
Replies: 1
Views: 314
Posted By Kevin Johnson
300SDL exhaust

I purchased a wrecked 87 to obtain spare parts to fix my 87. I noticed that the wrecked car has a dual pipe outlet exhaust system which I am assuming came from a gas engine. Has anyone tried this...
Forum: Diesel Discussion 12-25-2011, 12:25 AM
Replies: 15
Views: 2,042
Posted By Kevin Johnson
If it was me, I would pull the alternator and...

If it was me, I would pull the alternator and take it to a shop to be tested. I know that may not be practical if that is your only car. There are chargers/testers that can test the alternator and...
Forum: Diesel Discussion 12-22-2011, 02:24 PM
Replies: 15
Views: 2,042
Posted By Kevin Johnson
Well, before you investigate the wiper further it...

Well, before you investigate the wiper further it sounds like you need to check both your battery and alternator.
Forum: Diesel Discussion 11-16-2010, 11:23 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Ah, finally, some respite. About five or six...

Ah, finally, some respite.

About five or six years ago I designed a windage control setup for the SRT4. Ed Peters (ex Chrysler failure analysis engineer) got one for dyno testing and insisted on...
Forum: Diesel Discussion 11-16-2010, 09:51 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I love all those ads in North America about how...

I love all those ads in North America about how you can pull a caravan with your S class. And how trailer hitches for sedans are factory options.
Forum: Diesel Discussion 11-16-2010, 09:45 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I recall talking to a gentleman who campaigned...

I recall talking to a gentleman who campaigned Porsches back around the time the 928 was newer. He was told not to race them. If he did factory support would evaporate for his team. Rod bearing...
Forum: Diesel Discussion 11-16-2010, 09:36 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I am looking at an engine now where a design...

I am looking at an engine now where a design directive was given that there be fewer and lighter parts but with better NVH characteristics. Amongst other things, metal has been removed from certain...
Forum: Diesel Discussion 11-16-2010, 04:34 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
:rolleyes: You assume a lot. Go forth and study...

:rolleyes: You assume a lot. Go forth and study some more.
Forum: Diesel Discussion 11-16-2010, 04:09 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Thanks, just looked through it. I did not see a...

Thanks, just looked through it. I did not see a mention that troops are often instructed to march in broken step when crossing a bridge for the reasons outlined. It might be discussed in the...
Forum: Diesel Discussion 11-16-2010, 03:44 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Well, I got kicked off a Mopar slant six board...

Well, I got kicked off a Mopar slant six board for analyzing that engine design and having the temerity to suggest that engineering principles and cues from other versions of the engine were...
Forum: Diesel Discussion 11-16-2010, 03:21 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I enjoy thinking about engines and,...

I enjoy thinking about engines and, intellectually, I do not like it when they fail. I have had the tensioner fail multiple times on my engine as part of my introduction to owning a 300 SDL for only...
Forum: Diesel Discussion 11-16-2010, 02:33 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Yawn. You apparently assume that more than...

Yawn.

You apparently assume that more than one of the six cylinders is firing during any given 720 degrees of crank rotation. Possibly you assume as well that it will also be the same single...
Forum: Diesel Discussion 11-15-2010, 05:50 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
If I accept the data that indicates weak rods...

If I accept the data that indicates weak rods then it follows that, optimally, the rods should be replaced and at the same time the bores can be measured for ovality. I asked if aftermarket...
Forum: Diesel Discussion 11-15-2010, 11:52 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Mr. Kane's article clearly states: ...

Mr. Kane's article clearly states:




In S. H. Gawande et al, the title of figure 1 clearly states:



The presented torque curve in both Kane and Gawande match well which is not surprising...
Forum: Diesel Discussion 11-15-2010, 07:58 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Page 435. Peer reviewed. Graph is on the top of...

Page 435. Peer reviewed. Graph is on the top of the page. Concurs with Mr. Kane. Good try.

Yawn.

http://www.ijest.info/docs/IJEST10-02-04-12.pdf
Forum: Diesel Discussion 11-15-2010, 07:27 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I do not have the time or desire to relate the...

I do not have the time or desire to relate the possible parsings and valid set theoretical meanings and implications of those terms. Suffice it to say -- you're really grasping at straws and I did...
Forum: Diesel Discussion 11-15-2010, 06:03 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Yes. Nothing wrong with that. I...

Yes. Nothing wrong with that.



I gather you are referring to the mismatched Porsche parts. The customer did not misassemble the parts. They came that way from an engine with over 100,000...
Forum: Diesel Discussion 11-15-2010, 05:34 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
http://www.epi-eng.com/piston_engine_technology/to...

http://www.epi-eng.com/piston_engine_technology/torsional_excitation_from_piston_engines.htm

Note that when an even fire straight six has chaotic firing patterns the torque reversal peak becomes...
Forum: Diesel Discussion 11-15-2010, 03:58 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Yes, so far I have found anecdotal mention of an...

Yes, so far I have found anecdotal mention of an anecdotal 40% failure rate and 60% survival rate (survival to what, I do not know). Lumped into that failure rate are a number of different problems....
Forum: Diesel Discussion 11-14-2010, 09:52 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Source of your data? Edit: congrats on 2000...

Source of your data?

Edit: congrats on 2000 posts.

Edit 2: maybe you guys think I am being soft on Mercedes. I caught hell when I suggested that Porsche started stamping serial numbers on the...
Forum: Diesel Discussion 11-14-2010, 09:41 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
Are you saying that >60% of 350 SDL engines had...

Are you saying that >60% of 350 SDL engines had bent rod failures?
Forum: Diesel Discussion 11-14-2010, 09:39 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I am concerned that some who apparently see...

I am concerned that some who apparently see themselves as a hooded academic sitting in judgment fail to present the data they now cite anecdotally.




I cannot understand why people are not...
Forum: Diesel Discussion 11-14-2010, 09:18 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
I am glad the car survived the punishment. Swap...

I am glad the car survived the punishment. Swap in overfilling the sump oil and creating a runaway. That happens too. They even put a warning on the oil cap. I don't see a system to prevent...
Forum: Diesel Discussion 11-14-2010, 01:40 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
This is not directed at you, Jim. I think...

This is not directed at you, Jim.

I think that manufacturers have an almost impossible task set before them in trying to anticipate in what possible manner their products will be abused from the...
Forum: Diesel Discussion 11-14-2010, 01:29 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
That's great. Let's hope that when and if your...

That's great. Let's hope that when and if your shutoff valve ever starts to fail that you replace it promptly and not allow chaotic firing patterns as the engine struggles.
Forum: Diesel Discussion 11-14-2010, 01:24 PM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
It is not a result of the starter motor. If the...

It is not a result of the starter motor. If the engine cannot freely spin at consistent rates (after disengagement of the starter and allowing that engines do not normally spin at consistent...
Forum: Diesel Discussion 11-14-2010, 11:31 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
This is a weak response. So far, my...

This is a weak response.

So far, my hypothesis accounts for the observed data as well as data from the failure of other erstwhile unconsidered components. This puts it in advance of your...
Forum: Diesel Discussion 11-14-2010, 11:00 AM
Replies: 495
Views: 54,479
Posted By Kevin Johnson
The original design is not irrelevant if you are...

The original design is not irrelevant if you are attempting to do a statistical analysis of (purportedly) worldwide data. Correct? Yes, I do look at data a bit differently, don't I ?

Now, I...
Showing results 1 to 30 of 253

 
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