Thanks again.
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Huztl Farmertec 372 Build Kit
- Thread starter cvx1170
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Has anyone ever had issues with the case gasket leaking on these kits? used mine last weekend but after a short break it started up and smoked badly... sure enough oil was weeping into the crankcase.
I split the cases, couldn't see anything wrong. The mating surfaces looked ok and flat so cleaned them up and put a new gasket in this time smeared each side with 1184. Admittedly I didn't wait long enough for the 1184 to set up totally but a low pressure test shows an air leak into the oil tank (bubbles showing at the end of the oil feed pipe).
It's a bit baffling. Before I split it down again I'll leave it overnight with full tank of bar oil in just to see if the gasket swells a little and seals but I'm not holding my breath...
Scrap that idea I couldn't leave it, knowing I might not get a chance to look at it again for a while, I decided to split it again. This time I rushed less, had a real good look and got to the bottom of it... in my haste the first time and convinced it could only really be the case gasket I overlooked the real problem....
That definitely wasn't there when I assembled it. It looks like the powder coat was covering it up and sealed it hence why it initially passed a pressure / vac test but with a bit of heat and vibration the powder coat let go causing the leak
.
I've messaged Huztl hopefully they will get me sorted. I'll keep you posted...
I split the cases, couldn't see anything wrong. The mating surfaces looked ok and flat so cleaned them up and put a new gasket in this time smeared each side with 1184. Admittedly I didn't wait long enough for the 1184 to set up totally but a low pressure test shows an air leak into the oil tank (bubbles showing at the end of the oil feed pipe).
It's a bit baffling. Before I split it down again I'll leave it overnight with full tank of bar oil in just to see if the gasket swells a little and seals but I'm not holding my breath...
Scrap that idea I couldn't leave it, knowing I might not get a chance to look at it again for a while, I decided to split it again. This time I rushed less, had a real good look and got to the bottom of it... in my haste the first time and convinced it could only really be the case gasket I overlooked the real problem....
That definitely wasn't there when I assembled it. It looks like the powder coat was covering it up and sealed it hence why it initially passed a pressure / vac test but with a bit of heat and vibration the powder coat let go causing the leak
.I've messaged Huztl hopefully they will get me sorted. I'll keep you posted...
Oh my, that's not good. How do you think that happened, shipping damage?Has anyone ever had issues with the case gasket leaking on these kits? used mine last weekend but after a short break it started up and smoked badly... sure enough oil was weeping into the crankcase.
I split the cases, couldn't see anything wrong. The mating surfaces looked ok and flat so cleaned them up and put a new gasket in this time smeared each side with 1184. Admittedly I didn't wait long enough for the 1184 to set up totally but a low pressure test shows an air leak into the oil tank (bubbles showing at the end of the oil feed pipe).
It's a bit baffling. Before I split it down again I'll leave it overnight with full tank of bar oil in just to see if the gasket swells a little and seals but I'm not holding my breath...
Scrap that idea I couldn't leave it, knowing I might not get a chance to look at it again for a while, I decided to split it again. This time I rushed less, had a real good look and got to the bottom of it... in my haste the first time and convinced it could only really be the case gasket I overlooked the real problem....
That definitely wasn't there when I assembled it. It looks like the powder coat was covering it up and sealed it hence why it initially passed a pressure / vac test but with a bit of heat and vibration the powder coat let go causing the leak
I've messaged Huztl hopefully they will get me sorted. I'll keep you posted...
Yes let us know what they say. I hope they take care of you.
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No not shipping damage simply just a bad casting.. I believe cooling too quick can result in cracks like this. To be fair to Huztl they like me couldn't have known about the crack but how their suppliers didn't notice it and reject it before powder coating is a mystery.
I think I may now be past the seemingly usual automated / semi automated responses along the lines of can you supply photos (even though I already had), have you tried the part does it work? and can you describe the issue (as if I hadn't first time around) so I'm now waiting on a proper response...
Yes, its ridiculous what you have to go through to get a bad part replaced or refunded from China. It's not just huztl. I went through the same deal when I ordered a new Chinese carburetor for my old Toyota truck. It would not run. Cranked beautifully, but would not run. After 15 days of communication and sending pictures and videos. I finally got 100 of my 125 dollars back and kept the carb for parts. I had to get eBay involved to get that
I wish you the best on your situation.
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I wish you the best on your situation.
Sent from my Moto G (4) using Tapatalk
Just playing the devil’s advocate.
Pressing in the crankshaft cold with the case half not correctly supported could easily cause that crack. [emoji848]
Pressing in the crankshaft cold with the case half not correctly supported could easily cause that crack. [emoji848]
Just playing the devil’s advocate.
Pressing in the crankshaft cold with the case half not correctly supported could easily cause that crack. [emoji848]
I'm sure it could... but no press was involved nor could it explain how the powder coat has penetrated into the crack...
roy wilson
ArboristSite Lurker
i,m building a hutzl 372 with 52 mm kit and also have the 272 52 mm kit ,i saw this post and you mentioned about the squish and material removed from the 272 piston , they are windowed pistons compared to the 372 piston so do they work the same or is there less efficiency compared to the 272 cylinder, due to less volume pushed down , i will be removing 30 thou off 52 mm 372 cyl anyway but might try your setup instead , what do you think ?
Mine results in a brutal amount of compression. Not possible to start without the decomp. I'm considering building like a piston stuffer, basically model up a thing that I can print from nylon to fill the piston up to have it make more case compression that the factory piston.
Paul, were you pulling the case halves together with the screws?
Here's a vid on how to do it without risking the bearings or the case, or using heat or cold
Paul, were you pulling the case halves together with the screws?
Here's a vid on how to do it without risking the bearings or the case, or using heat or cold
I put all my cases together with a pulling tool I made a few years ago which works on the exact same principle as in your video but not quite so fancy (more along afleetcommands version).
Not that the method of assembly would have made any difference in this case... on careful examination it's clear the crack was present on leaving the foundry. The lack of quality control resulted in it being covered up with powder coat instead of being rejected.
I have had a bunch of hutzl cases now....all different models. All have been fine...with the exception of random weirdness (372 impulse nipple in the wrong location). This is new and unfortunate. How far does the crank go? Can you grind on the powder coat a bit and chase that crack?
Yep it's definitely unusual this is the 4th Huztl kit I've done the others were spot on especially the crankcases. I've not ever come across any other mention of similar before either. The crack extends to the very left edge of the second photo at least and I suspect will go even further if the powder coat is scraped off. That will be something I will get onto when I get it sorted with Huztl... as it is they can inspect it for themselves and see that the crack was covered up.
Although interesting to us I imagine hutzl won't care that much. Odds are it'll be cheapest just to get a new set of cases and move on. Best of luck with your build!
roy wilson
ArboristSite Lurker
hmm sounds good , might add more weight to the piston so might be rod stretch and maybe fatigue , i,ll weigh the pistons in gramms and see the difference , the 52 mm kit seems quite heavy but no idea of the OEM weight as i dont have one , ligher is always better , thats why forged pistons are always better , better structure and more machining so less stress on crank and rod / bearings , higher compression must add stress , but usually is fine to a limit from manufaturing road cars to race cars
Walter Glover
ArboristSite Guru
Going to town to pickup a parcel )
Edit
Parcel in hand. Notice was dated 11 days after order to Canada. Not bad
)Edit
Parcel in hand. Notice was dated 11 days after order to Canada. Not bad
