I have an EJ2.5 SOHC engine in a gyrocopter (RAF 2000). The engine has a grand total of 149 hours of run time since a complete commercial overhaul and installation in the gyro. The 149 hours includes about 20 hours of break in run time.
It has developed a coolant leak near on at the water pump. Which means, the way it is mounted, that I have to remove the timing belt to get to the pump, which means removing the crank pulley to get the timing belt cover off (2 of the three sections), which means pulling the engine off of the frame since the crank pulley is mounted about 1" from the main mast.
Does anyone have any input or advice on water pump failures on low time engines? On anything from what to look for to advice on R & R of components just on getting access to the water pump? I have determined that the leak, which is a steady slow drip, even with no pressure on the coolant system, is not coming from a hose connection anywhere. I do have the engine manual, or at least substantial parts of it. I am also an A&P, but have never worked on Soobs except to install this one.
I am fitting a 2:1 PSRU and plan to reduce the water pump speed. I have fabricated a pulley, the size of which reduces the pump speed by 16%.. Is this about...
John Anderson
jlrmanderson@...
Jul 13, 1998 5:21 pm
... The 10.6 cm EA71 pulley reduces it by about 12% 16% off 5000 rpm is 800 which sounds even "more better" Did you turn one out of solid? curious Tim -- Home...
Tim Foulkes
tjdaff@...
Jul 13, 1998 6:15 pm
I know that the Soobs are considered superior in every way but with the Ford V-6's we find it most benificial to reduce the diameter of the crank drive pulley...
Bruce A. Frank
BAFRANK@...
Jul 13, 1998 6:30 pm
... Bruce, your comment about Ford V6 (being lesser engines) may apply to a Ford owner who does not have your fine newsletter, but surely not to those who...
Paul Messinger
paulm@...
Jul 13, 1998 6:33 pm
Airsiggers, I've seen pics of a set of aluminum double-v grooved pulleys for Soobs to run two belts, with pulleys sized to run the alternator and water pump...
Tom Andersen
tomkr2s@...
Jul 14, 1998 1:52 am
... Tom...I think that may have been NSI ... Dave Stroud Christavia Mk 1 C-FDWS Ea 81 Reductions...
David Stroud
dstroud@...
Jul 14, 1998 2:04 am
... Hi Tim, no I have machined the standard turbo pulley ( larger than on std 81) down to a flange and have fitted a pressed offset pulley I got from the ...
John Anderson
jlrmanderson@...
Jul 14, 1998 7:38 am
Thanks Bruce, but I think Bob N. suggested leaving the alternator RPM the same. J.A. ... Ford ... drive ... We ... to...
John Anderson
jlrmanderson@...
Jul 14, 1998 8:33 am
Why do it? I didn't know I was supposed to and they are both still flying. The HO series engine is factory tuned to run 5+K and uses standard waterpump and...
Doug & Lisha Belbin
dbelbin@...
Jul 14, 1998 8:53 am
Doug, you remind me of one of my old school teachers. Your conviction to the subject is over whelming. I have read several times that for sustained high rpm it...
John Anderson
jlrmanderson@...
Jul 14, 1998 9:24 am
I recall a crash being posted a couple years ago. The guy had his alternator fail and didn't notice the gradual discharge of battery. Someone speculated that...
ok How
alwick@...
Jul 14, 1998 3:02 pm
... NSI sells them; Pricey. The turbo soob (stock EA81) has dual belt setup for those who want a lower cost way to dual belts. Paul...
Paul Messinger
paulm@...
Jul 14, 1998 3:45 pm
First let me correct a mis-statement in my original post: the crank pulley diameter is reduced and the water pump and alternator pulleys are increased in...
Bruce A. Frank
BAFRANK@...
Jul 14, 1998 4:06 pm
... Snips:> Now, it has been a practise, for decades, in auto racing to install oversize ... reduces ... water) ... to ... days. ... that ... installation ... ...
John Anderson
jlrmanderson@...
Jul 15, 1998 1:58 am
John Anderson wrote: snip ... Consider the turbo engine develops more HP at lower RPMs and needs more cooling. Depending on how a turbo is used in an acft the...
Paul Messinger
paulm@...
Jul 15, 1998 2:51 am
... 85 ... Yes Paul, this makes sense. J.A. EA 81T RFI PSRU Series 5 KF...
John Anderson
jlrmanderson@...
Jul 15, 1998 9:32 am
With all this talk about water pumps has anyone looked into an external pump?The standard pump does take a lot of power to run. Woody...
wood
richard.wood@...
Jul 15, 1998 10:00 pm
Woody Usually when things take a lot of power, its because they are doing a lot of work. I would suggest that when the degree of sophistication that is shown...
bamcknig@...
Jul 15, 1998 10:44 pm
John I didn't even bother with the swirl pots some get carried away with. Look at the Rotax, I do not see one there either. Any time you think "I should do ...
Doug & Lisha Belbin
dbelbin@...
Jul 16, 1998 3:09 pm
I have an EJ2.5 SOHC engine in a gyrocopter (RAF 2000). The engine has a grand total of 149 hours of run time since a complete commercial overhaul and...
-OK, a few updates. After scouring this forum I have picked up several helpful hints. I managed to loosen the engine enough to slide it back far enough to...
Mine went at 145,000km on my car. The garage said it wasn't unusual. Dino ... From: dws_jmc To: AirSoob@yahoogroups.com Sent: Thursday, June 04, 2009 7:34 PM ...
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