Less than 100 hours on these heads, and the intake valves on both heads leak.
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| Even the almighty IM heads valves leak http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=27247 |
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| Author: | OwenDickeson [ Wed Feb 29, 2012 5:35 pm ] |
| Post subject: | Even the almighty IM heads valves leak |
Less than 100 hours on these heads, and the intake valves on both heads leak.
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| Author: | BoatDR [ Wed Feb 29, 2012 5:41 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
Did you try running any cleaners thru the motor before you took them off? I've had 2 motors come thru here this month to get ready for fishing season that upon an initial inspection failed a leak down test. But after running a cleaner thru the motor (and getting out all the carbon deposits from running cheap gas) they were fine. |
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| Author: | POKER1 [ Wed Feb 29, 2012 5:44 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
| Author: | BoatDR [ Wed Feb 29, 2012 5:49 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
First I started with a decarbonizer (foaming degreaser) called Power Foam from Amsoil. Then ran about a gallon of gas mixed with a shock treatment of Yamaha Ring Free. I also told my customers to run their next 2-3 tanks with some Ring Free just to be on the safe side, but my leak down numbers went from 65% blow by to just under 20% on both motors. |
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| Author: | OwenDickeson [ Wed Feb 29, 2012 5:52 pm ] |
| Post subject: | Even the almighty IM heads valves leak |
No I didn't I always run a 93 octane with marine Stabil. |
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| Author: | POKER1 [ Wed Feb 29, 2012 6:05 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
| Author: | BoatDR [ Wed Feb 29, 2012 6:13 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
| Author: | POKER1 [ Wed Feb 29, 2012 6:16 pm ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
| Author: | duckduckboom [ Thu Mar 01, 2012 12:32 am ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
My stock ones looked just like that. I laped them and put it back together. It runs fine now but I didn't get a chance to put it in the water yet |
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| Author: | naj [ Thu Mar 01, 2012 1:06 am ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
| Author: | OwenDickeson [ Thu Mar 01, 2012 8:50 am ] |
| Post subject: | Even the almighty IM heads valves leak |
Oh well they are gonna get a valve job and have everything checked out. |
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| Author: | MaXXis85 [ Thu Mar 01, 2012 9:16 am ] |
| Post subject: | Re: Even the almighty IM heads valves leak |
Kind of explains why it was not running like it used too in the mid range huh? |
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| Author: | OwenDickeson [ Thu Mar 01, 2012 10:56 am ] |
| Post subject: | Even the almighty IM heads valves leak |
That and why I had to step up my pilot jet one size larger to get it to come off of idle decently. |
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