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View Full Version : Nissan CN 4-33, SD22P1 WATER INJECTOR NEEDED.



STOPBATH777
07-11-2012, 01:08 PM
What is the part number or a source for new water injectors for a Nissan CN 4-33, SD22P1? This is the tall round pipe mounted on the exhaust manifold that the engine exhaust enters and water is added before moving on out the boat.

5046
Denny
Sailing Lake Mead Nv.

fitznooney
07-12-2012, 02:00 AM
I am afraid that is not a genuine Chrysler part.
It looks like a fabricated after market part.

STOPBATH777
07-15-2012, 06:45 PM
I am afraid that is not a genuine Chrysler part.
It looks like a fabricated after market part.


Thank you for the advice and information. Not being able to find an exact replacement I used a 4 grinder with a cut off wheel and opened up the water injector. The exhaust pipe is upright into a large cup which has water flowing in on top of the cup. Problems were cup had several pin holes allowing water to drip down into exhaust pipe. Also exhaust pipe was burned off below the cup allowing water to splash into exhaust. Material is some alloy as non magnetic except for the flange that bolts to the engine exhaust manifold. I was able to use braze on the cup top to stop the leaks. Then I took the parts to a welding shop that added to the vertical exhaust and welded everything back together. This has stopped the water into the engine.
I just purchased this Challenger 35 ft. sail boat with the engine not starting. After drying out the Nissan SD-22 now will start but only with a shot of either. Once started engine seems to run fine. Compression is 360 on all 4 glow plug holes. A new starter and large battery bank did not help the starting engine problem.
Is the next step to remove valve cover and check timing and clearance?
Thank you for your help.
Denny
Sailing Nevada Lake Mead.

fitznooney
07-16-2012, 01:06 AM
Compressions should be 426 or above.
If you have had water into the cylinders, it will cause rusting of the bores and also gumming up of the rings.
I would also check the glow plugs for continuity and voltage at the bus.
Checking the valve clearances would also be a good idea.

STOPBATH777
07-16-2012, 11:25 AM
Thank you Fitznooney for the compression data. The glow plugs current is 6-7 amps which I think is normal. I will start with the valve first then pull the head if nothing else works.

Denny
Sailing Nevada lake Mead.

fitznooney
07-17-2012, 12:59 AM
Hi Denny,
6-7 amps is not normal. It should be In the vicinity of 25 amps total.
Each one should have a resistance of 1.6 ohms.
They should be marked 10.5 volts.
Also it takes 20-30 seconds to get them up to temperature.
Cheers,
Mike

STOPBATH777
07-17-2012, 12:06 PM
Thanks Mike,
The 6-7 amps was per glow plug. That would give me about 25 amps for the 4 total. I will try longer time and see if that helps.
Denny
Sailing Nevada lake Mead.

robertooroark
08-21-2012, 10:30 AM
I have the cylinder head off of my 1972 SD 33, and got a gasket set (from Tiffin Parts in Ohio) that is for a 1980 and newer, even though I specified the earlier engine.
It came with a lot (10) of rubber coated rings that look like they are the same size as the small copper gaskets for the injector tips, and some larger ones that look the same size as the upper copper compression seal on the injectors....the kit also has 6 small copper rings for the injector tip, but only two of the larger copper rings...it has a couple of some medium sized rubber rings too...
I have a free copy of the service manual from the internet missing three pages (M 15-18) and tried to buy a copy but it is missing those pages too. The manual says "don't forget to install the rubber seals" in the head gasket...
I have placed two of the large rubber rings in the head gasket at the rear end where they fit over what seems to be oil passages, and two of the medium ones on two passages forward of No 5 cylinder....there is another hole at the rear end of the gasket, that has a "stepped" end in the block, and there is one copper "compression' type ring that seems to fit there, but I am not sure about what is supposed to go there...So basically, I am missing a drawing of the head gasket that shows where the sealing rings go, and a list of the parts that are required...the 1980 gasket set has smaller valve guide seals too, but I cut the valve guides down and used a better type, so that seems to be ok...but it is frustrating not being sure about why there are so many of the rubber coated rings, and not knowing where they go...there are holes in the gasket that are the size of the small rings, but they are "blank" against the block and head...no passages in either, at those holes...should I put the rings there? are these a new type of injector seal? I took the head off because there was a lot of white smoke that smelled like unburnt fuel, but seemed to be water vapor, but the head gasket did not look "blown"...so I had it serviced, and now have this problem with the gasket set...any guidance would be appreciated.
Robert
[email protected]
415 250 3214

fitznooney
08-22-2012, 01:00 AM
Hi,
First let me say that multiple postings of the same post is against forum rules.
One will suffice.
Here is a link to a picture of the HG with the positions of the o-rings.

http://www.aagaskets.com.au/SetDetails.aspx?SetID=1587

Cheers,
Mike

Veseeraantarf
11-01-2012, 10:57 PM
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