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Author Topic: MTDI in a boat  (Read 8797 times)

Reply #60July 07, 2017, 09:51:53 am

LabradorSteak

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Re: MTDI in a boat
« Reply #60 on: July 07, 2017, 09:51:53 am »
Would this work for me?  It says it is a sbc flywheel 14# g60.  For an 02j 5speed.

http://forums.tdiclub.com/showthread.php?t=477531&highlight=Flywheel

http://imgur.com/a/G3hFl

Matt

Reply #61July 07, 2017, 03:34:18 pm

vanbcguy

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Re: MTDI in a boat
« Reply #61 on: July 07, 2017, 03:34:18 pm »
I believe so yes, though I'd go for the heaviest flywheel you can find. SBC make some 21lb ones. A stock AHU car came with a 21lb single mass flywheel.

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #62July 07, 2017, 08:37:38 pm

ORCoaster

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Re: MTDI in a boat
« Reply #62 on: July 07, 2017, 08:37:38 pm »
The engine you are building makes that Johnson 8 hp one look pretty feeble.  I would use it for that slow speed fishing on a river somewhere though. 

And the exhaust looks too good to hide.  Would you be up for putting on a regular turbo manifold on that beast?  Cleaner look. 
Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #63July 07, 2017, 09:24:04 pm

LabradorSteak

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Re: MTDI in a boat
« Reply #63 on: July 07, 2017, 09:24:04 pm »
The manifold is water jacketed so it will keep the temperature down in the engine compartment.  Boats don't get great airflow around the engine like a car does so water jacketing as much as possible is important.  Wait until I weld a little water jacket on the turbo...People will be screaming about losing thermal efficiency.  Unfortunately it is necessary or things start to melt...

I haven't run the johnson in years.  It came with a boat as a backup engine but could hardly push it...Better than just floating dead in the water but not much.

Matt.

Reply #64July 08, 2017, 12:34:12 am

LabradorSteak

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Re: MTDI in a boat
« Reply #64 on: July 08, 2017, 12:34:12 am »
I need some help identifying what this hose coming from the back of the head is for. 
I don't remember what the hose was connected to and don't see a purpose for it.  Can i just plug it up and be done?



Matt

Reply #65July 08, 2017, 05:22:33 pm

vanbcguy

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Re: MTDI in a boat
« Reply #65 on: July 08, 2017, 05:22:33 pm »
Don't believe there was a hose there factory. I believe there's a freeze plug there normally.

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #66August 15, 2017, 01:21:08 am

LabradorSteak

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Re: MTDI in a boat
« Reply #66 on: August 15, 2017, 01:21:08 am »
I think I have everything ready to start the engine.  It is timed accurately...I think.  There is oil, coolant, and now I need to prime the pump.

I was just planning on loosening the injector lines and turning it over until fuel flows out then retightening them and hoping it starts.  Do I need to loosen the lines at the injectors or the pump? 

Is the problem that all of the air needs to be removed from the lines or the pump?  Will the injectors not reach their pop off pressure with air in the line or does the pump just need to have no resistance while trying to move fuel through it?

Thanks, Matt.

Reply #67August 15, 2017, 01:24:17 am

vanbcguy

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Re: MTDI in a boat
« Reply #67 on: August 15, 2017, 01:24:17 am »
It'll start easier if you purge the air from the lines but it isn't 100% necessary.

It will start a heck of a lot quicker if you do though, especially if there's any air in the pump.

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #68August 15, 2017, 01:30:30 am

LabradorSteak

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Re: MTDI in a boat
« Reply #68 on: August 15, 2017, 01:30:30 am »
cool thanks,  thursday is my first day I will have a chance to try it.

Matt

Reply #69August 15, 2017, 02:27:33 am

vanbcguy

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Re: MTDI in a boat
« Reply #69 on: August 15, 2017, 02:27:33 am »
Don't be surprised if it sounds a little nasty while any remaining air finds its way out!

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #70August 18, 2017, 05:03:56 pm

LabradorSteak

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Re: MTDI in a boat
« Reply #70 on: August 18, 2017, 05:03:56 pm »
I made it run!!!

I started to bleed the injectors...cracked the first one and a little fuel came out so I cracked the second and it fired right up!!

It is awesome to have it actually run.  Now I have to start tuning it.

There was a little dark (not blue) smoke at idle and some white smoke when I revved it and then let off the throttle.  I assumed with the turbo it wouldn't smoke at all while it wasn't under load. 

Here is a video..let me know what you think and what you think the smoke means.

https://www.youtube.com/watch?v=LMSxHurSk9w&feature=youtu.be

Matt

Reply #71August 18, 2017, 06:06:45 pm

LabradorSteak

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Re: MTDI in a boat
« Reply #71 on: August 18, 2017, 06:06:45 pm »
I did just realize that the intercooler isn't hooked up and that could change things.  I really just need to get it in the boat and test it there under load and connected correctly...

I guess I was wondering if it sounded normal or if I needed to check the timing again.  Many of the articles said to time it by ear after getting it set with the dial gauge.  I could do that with a gas engine but I don't know what to listen for with a diesel.

Matt.

Reply #72August 18, 2017, 06:59:55 pm

vanbcguy

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Re: MTDI in a boat
« Reply #72 on: August 18, 2017, 06:59:55 pm »
Almost sounded like it was down a cylinder before you revved it. Was this shot immediately after you fired up? Sounded a lot better after it idled down again.

If a cylinder was still working the air out some white smoke would not be unusual at all.

Assuming you've verified oil pressure and all that good stuff, I'd run it with a bit more RPM for a couple of minutes before trying to assess anything about how it is running.

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #73August 18, 2017, 07:29:15 pm

LabradorSteak

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Re: MTDI in a boat
« Reply #73 on: August 18, 2017, 07:29:15 pm »
It surprised me when it started so I pulled out my phone and started shooting.  It may have been running 20 seconds or so when I started the video.  I don't have any of the gauges set up yet I was just trying to bleed the lines when it started.

Where is a good port to put in an oil pressure gauge?

Matt.

Reply #74August 18, 2017, 11:05:46 pm

ORCoaster

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Re: MTDI in a boat
« Reply #74 on: August 18, 2017, 11:05:46 pm »
At the top of the head there is the oil sensor that shuts off the light normally on when first starting.  Put in a tee or run an oil pressure line to someplace you can mount one and put the senor on one side and the gauge on the other.  Or some oil filter flanges have a threaded spot or two on them but the one on the head is what you get at the end of the line not right after the oil pump is pumping oil into the filter. 

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