TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: red88r on December 30, 2013, 09:50:15 PM
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The bottom end that was came in my 87 leaks oil out the back where the swingarm rubbed and touched it over the years. Not real bad but enough to make a mess and annoy me. I assume this is from running with bad arm bearings,loose motor mounts,no headstay and running a 88-89 arm on a 87 frame .....all from previous owner. Anyways it looks like only the left case half has a couple of hairline cracks in it. Since this is just my trailrider and I don't want to stick alot in this wheeler at this time I'm thinking of roughing it up and just putting some RTV gasket sealant on the damn thing and running her. Anyone else have any other things that will work well without welding or replacing the case half? Thanks in advance.
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X2......Im intrusred in a list of case repair guys as well....
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Show me some pictures of what you need welded and machined.
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Jerry from White Chassis has done repair work to 250r cases. I was pretty impressed
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I understand about not putting a lot into your trailrider....but as we all know the cracks will not get any better and most likely only worse. I would suggest that you get it repaired the right way the first time (at least you save the cases for years to come).
I only bring this up is because I too have 2 sets of cases that need repaired: 1 set is cracked at the drain plug. the other set has the typical damage at the case saver and shifter boss: lower case saver is busted and the shifter boss I cracked bad.
sooo...who do you guys suggest I send my cases to?
sorry to the op if I overstepped on your thread.
thanks
joe
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Not at all Joe. Thanks everyone...I will post pics Tuesday night after work. I would like to just to put a bandaid on it till summer but I will see. Then I could at least run one of my other quads. Basically with all my other projects going on I am being lazy and trying to save some money. Usually I do not cut any corners.
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I understand about not putting a lot into your trailrider....but as we all know the cracks will not get any better and most likely only worse. I would suggest that you get it repaired the right way the first time (at least you save the cases for years to come).
I only bring this up is because I too have 2 sets of cases that need repaired: 1 set is cracked at the drain plug. the other set has the typical damage at the case saver and shifter boss: lower case saver is busted and the shifter boss I cracked bad.
sooo...who do you guys suggest I send my cases to?
sorry to the op if I overstepped on your thread.
thanks
joe
Pete@Hybrid Eng would be a good place. I saw some pics of cases fixed by Jerry White and they looked awesome.
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I was wondering, could the lines your seeing just be minor imperfections from the casting process & not cracks? I just picked up a spare 86 engine & it has those flashing lines on it.
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I assume for all these repairs you have to split the cases? I am asking because I have never had to repair a case before.....only a clutch cover once.
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I'm guessing it would definitely require splitting the cases. Would make it much much easier on the person doing the repairs as well
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RTV will work if you don't feel like tearing her down,
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Obviously welding is the best fix for a crack, but sometimes the hilbilly in all of us comes out and there are some things that can be "fixed" with sealers.
First if this is a stress area then you probably really should consider welding it, but then welding does create problems if they are near bearing holes and such, many bearing holes will egg shape even with a bearing still in the hole.
But if this is just a small tight crack in a area of no stress then you might consider a gas tank sealer, it will not break down like many rtv sealers do in oils
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Here are the pics....hope everyone can see them ok. Yes I would like just smear something on there at least for now. Thanks for all the responses so far.
(http://i944.photobucket.com/albums/ad284/red88r/101_2299_zps6c9f5b25.jpg) (http://s944.photobucket.com/user/red88r/media/101_2299_zps6c9f5b25.jpg.html)
(http://i944.photobucket.com/albums/ad284/red88r/101_2300_zpsffce5b1f.jpg) (http://s944.photobucket.com/user/red88r/media/101_2300_zpsffce5b1f.jpg.html)
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pressurize the case and check to be sure were the leak is
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I was wondering, could the lines your seeing just be minor imperfections from the casting process & not cracks? I just picked up a spare 86 engine & it has those flashing lines on it.
Missed your response last night a minute before mine. These are leaking cracks....I just posted pics. I wish they weren't though.
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pressurize the case and check to be sure were the leak is
Should I do this through the vent or do I have to do it when doing a leakdown test?
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Missed your response last night a minute before mine. These are leaking cracks....I just posted pics. I wish they weren't though.
were those cracks are located your going to have to split and weld for it to last more then a short non bumpy ride
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I hope not.....it was not leaking bad when I got it. Just annoys me to see a mess even if it is on my beater.
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I hope not.....it was not leaking bad when I got it. Just annoys me to see a mess even if it is on my beater.
ya clean it up real good make sure all the oil is gone and put some sealant down it might last...??? it cant make it worse, give it a go, like you said its only going to make a mess if it leaks,
as long as you keep an eye on it and the oil level then when or if you have time get them done right
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The cracks you observe travel beyond what the eye can see. If you weld a crack it will continue run away from the weld area. Welders will drill a hole just past the end of the crack for this purpose. Weld up to the hole and then fill the hole with a few passes.
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The cases will need to be split to properly weld and machine them. Case broken in this area is usually the result of flex in the frame or the swing arm pushing against the cases.
We have welded and machine hundreds of 250R cases over the years. Cracks in the cases in this area will return if the suspension, swing arm bearings or riding style is not changed. There is not any room to add additional material on the inside or outside of the case in this area.