I'll be the first to admit I'm mechanically challanged. I am install new mixing and exhaust elbows on a ysm8. Is there any tricks I should know? Is there something to use on the threads of the joint between the two elbows? Also is there a good lubricant to use where mixing elbow is inserted in the rubber exhaust hose? Many thanks.
Yanmar ysm8
- Thread starter jb20731
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Not too many tricks.
I would use anti-seize compound on the bolts during assembly. (good luck removing them) and I would NOT use any lubricant on the exhaust hose-elbow joint. That's the last place that you want a slippery hose. In fact, gluing the hose onto the elbow is better.
I would use anti-seize compound on the bolts during assembly. (good luck removing them) and I would NOT use any lubricant on the exhaust hose-elbow joint. That's the last place that you want a slippery hose. In fact, gluing the hose onto the elbow is better.
ysm8
Agree with fred, prob get away with dish soap for a lub though. I changed my out, be sure to use the anti-seize on the threads. The first time, well the only time so far I've done this I broke the exhaust manifold taking it apart. I've noticed I can unscrew it easy now due to the anti-seize I put on last time. I do need to take it apart and check it, its been about 5 years..
Agree with fred, prob get away with dish soap for a lub though. I changed my out, be sure to use the anti-seize on the threads. The first time, well the only time so far I've done this I broke the exhaust manifold taking it apart. I've noticed I can unscrew it easy now due to the anti-seize I put on last time. I do need to take it apart and check it, its been about 5 years..
Big Wrench
You will need a big wrench and something big to hold it in maybe some WD-40 on the treads which are reverse to loosen. If that doesn't work try some heat. Nick
You will need a big wrench and something big to hold it in maybe some WD-40 on the treads which are reverse to loosen. If that doesn't work try some heat. Nick
JB, I just recently did this
I dont know if its too late but... Since I replaced "both sides", the portion that bolts to the exhaust manifold and the actual elbow itself, I just had the yard that I purchased it from put the two halves together. They did use a sealing compound. What was it? Good question. Totally concur with Fred. Just slide the hose on and double clamp with some new stainless ones. Make sure you clean the old gasket material off of the manifold. Not a good place for a seawater leak. I just used a scraper. Put some 3 and 1 or some sort of penetrating oil on the bolts and let it sit. Torqe the new ones down "tight". Be careful here, the upper and lower bolts may be different! Then just check them after your first couple of trips out motoring. Tis really not that hard. Cheers
I dont know if its too late but... Since I replaced "both sides", the portion that bolts to the exhaust manifold and the actual elbow itself, I just had the yard that I purchased it from put the two halves together. They did use a sealing compound. What was it? Good question. Totally concur with Fred. Just slide the hose on and double clamp with some new stainless ones. Make sure you clean the old gasket material off of the manifold. Not a good place for a seawater leak. I just used a scraper. Put some 3 and 1 or some sort of penetrating oil on the bolts and let it sit. Torqe the new ones down "tight". Be careful here, the upper and lower bolts may be different! Then just check them after your first couple of trips out motoring. Tis really not that hard. Cheers
Thanks guys
Thanks for the replies. Since there is little acess to the exhaust manifold on this boat I figured to put both sides togather first as Rick has mentioned than bolt it to the engine. It seems the old mixing elbow is very tight in the exhaust hose and is gonna be a real bear to get out. There was no gasket sealer on the exhaust manifold when I took it off, should there be some there. I am putting on a new gasket.
Thanks for the replies. Since there is little acess to the exhaust manifold on this boat I figured to put both sides togather first as Rick has mentioned than bolt it to the engine. It seems the old mixing elbow is very tight in the exhaust hose and is gonna be a real bear to get out. There was no gasket sealer on the exhaust manifold when I took it off, should there be some there. I am putting on a new gasket.
JB, yes
The elbow should come with a new "metal" gasket and new bolts. It is the only material you need. No compounds go on this. Just bolt it on. My hose..er so to speak was a bear also. I disconnected the whole elbow assembly from the engine and loosened the clamps. I actually put a wee amount of penetrating lube around the hose seal and then I put a long screwdriver and just pried gently to break the seal on the hose and then twisted the crap out of it until it broke loose. I then cleaned the inside of the hose best I could. So easy a caveman could do it.. NOT. But hang in there. Cheers
The elbow should come with a new "metal" gasket and new bolts. It is the only material you need. No compounds go on this. Just bolt it on. My hose..er so to speak was a bear also. I disconnected the whole elbow assembly from the engine and loosened the clamps. I actually put a wee amount of penetrating lube around the hose seal and then I put a long screwdriver and just pried gently to break the seal on the hose and then twisted the crap out of it until it broke loose. I then cleaned the inside of the hose best I could. So easy a caveman could do it.. NOT. But hang in there. Cheers
Don't use anti-seize
Never use anti-seize on exhaust manifold bolts/nuts. It hardens up after repeated heating and cooling and insures that the bolt will NOT come out next time. A thin coat of engine oil on the threads is a better alternative. I never put anything on exhaust manifold bolts. Taking out the bolts is an art form. You CAN NOT get them out by just unscrewing them. You have to "work" them out. Start with cracking them loose and then tighten them again. back them out a little more and tighten again. Repeat till you can get the bolt out. If at any time the bolt tightens up, screw it back in and the back it out again. This breaks up the corrosion. Good luck.
Never use anti-seize on exhaust manifold bolts/nuts. It hardens up after repeated heating and cooling and insures that the bolt will NOT come out next time. A thin coat of engine oil on the threads is a better alternative. I never put anything on exhaust manifold bolts. Taking out the bolts is an art form. You CAN NOT get them out by just unscrewing them. You have to "work" them out. Start with cracking them loose and then tighten them again. back them out a little more and tighten again. Repeat till you can get the bolt out. If at any time the bolt tightens up, screw it back in and the back it out again. This breaks up the corrosion. Good luck.
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