Sandman993 Posted September 30, 2019 Report Posted September 30, 2019 Anyone know where to get or what a fella can use for cowl flap bushings. Sorry if this has been covered on another thread, but a search didn't find anything. Quote
carusoam Posted October 1, 2019 Report Posted October 1, 2019 Not familiar with the J cowering... but Lasar May have the parts... https://lasar.com/search?q=Cowl bushing See if that helps? Best regards, -a- 1 Quote
FLYFST Posted October 1, 2019 Report Posted October 1, 2019 Got mine from LASAR. Make sure to check the diameter and length is correct for your aircraft.Sent from my iPhone using Tapatalk Quote
Sandman993 Posted October 1, 2019 Author Report Posted October 1, 2019 Hard to make myself pony up $500 for 4 little bolt thru bushings. Quote
EricJ Posted October 1, 2019 Report Posted October 1, 2019 On 10/1/2019 at 9:01 PM, Sandman993 said: Hard to make myself pony up $500 for 4 little bolt thru bushings. Expand Bushings are one of the stated examples of owner-produced parts. Quote
Guest Posted October 1, 2019 Report Posted October 1, 2019 On 10/1/2019 at 9:01 PM, Sandman993 said: Hard to make myself pony up $500 for 4 little bolt thru bushings. Expand A short length of 4130 tubing from Spruce, a hack saw and a file should work just as well. Clarence Quote
jetdriven Posted October 2, 2019 Report Posted October 2, 2019 What year and model is your airplane? Later models use a 1/4 inch OD 16th inch wall 1/4” wide bushing you can buy from McMaster Carr for like $.30 apiece 1 Quote
Sandman993 Posted October 2, 2019 Author Report Posted October 2, 2019 On 10/2/2019 at 12:11 AM, jetdriven said: What year and model is your airplane? Later models use a 1/4 inch OD 16th inch wall 1/4” wide bushing you can buy from McMaster Carr for like $.30 apiece Expand 78 J Think I'm on to something hopefully Quote
Sandman993 Posted October 2, 2019 Author Report Posted October 2, 2019 Thanks men, I appreciate you taking a minute to help out. My problem is, ...the cowl flaps are in good condition and have always worked fine until recently. On the ground, they work as advertised, but in flight, there's just enough side load that they get a little bound up and only close to half. While that's fine and they stay in that position 70% of the time anyway, at cold higher altitudes, it's hard on the oil temps ( a little too cool), not to mention the 1 to 2kts added drag component. I tried to tweak them last two times the cowl was removed and while they seemed free enough...flying the ship turned out to be a different duck. Think one bushing is gone altogether for whatever reason...lost perhaps, who knows. Does the spring on the linkage have any effect I wonder? I've looked at it, but can't seem to figure out why it's there or what it actually does. Thanks again for your time Quote
PeytonM Posted October 2, 2019 Report Posted October 2, 2019 1989 J looking for cowl flap bushing. What part # from McMaster-Carr? (“Press fit drill bushing”) Prices I saw on their website were approx $25 each. Maybe I’m looking at the wrong part. Thank you for your help. Quote
Yetti Posted October 3, 2019 Report Posted October 3, 2019 Older than me 9" southbend lathe. Some alum stock. carbide bits from amazon, drill bits. Fitting with a file. Check to make sure your linkage is set up properly. My disconnect was installed backwards. The disconnect pin is supposed to point to the centerline of the plane. Mine was reversed so the tailpipe was not fitting well. Quote
PeytonM Posted October 6, 2019 Report Posted October 6, 2019 I had great luck with McMaster-Carr, just different dimensions for my year. HUGE savings! I’ll be making another contribution to MS. Thank you, jetdriven! 1 Quote
larrynimmo Posted October 9, 2019 Report Posted October 9, 2019 On 10/1/2019 at 10:18 PM, EricJ said: Bushings are one of the stated examples of owner-produced parts. Expand My ai redid my cowl flaps...he custom made necessary parts...not paying $700 for two kits 1 Quote
Jay-with-a-J Posted March 5, 2020 Report Posted March 5, 2020 On 9/30/2019 at 5:32 PM, Sandman993 said: Anyone know where to get or what a fella can use for cowl flap bushings. Sorry if this has been covered on another thread, but a search didn't find anything. Expand Hi, I have the cowl flap bushings if you still need them. PN is 914039-009. Thanks, Jay, Quote
Sandman993 Posted March 7, 2020 Author Report Posted March 7, 2020 Hopefully, I found the issue... after replacing bushings, the cowl flaps continued to be problematic. After searching for the real problem ( hang from the ankles under the engine deep under and back at the firewall) found the cable had let go at the area where the tube sleeve connects near the linkage. Called lasar and the wanted $775 for cowl flap cable. Geez! So I slipped a 3/8” dia section of hose over the segment and added clamps. Works great and it simply replaced another piece of plastic that married the part of the cable to the steel tube that carried the cable and keeps it stiff. Plenty of patience because it’s like buildIng a ship in a bottle. Am happy to report, no blood was donated in the effort.... as I usually bleed a little when working upside down in the area of firewall and engine. so far, so good. 1 Quote
PeytonM Posted July 9, 2020 Report Posted July 9, 2020 One of the bolts on a hinge point on my right cowl flap departed the airplane, so I purchased the replacement bushing (McMaster Carr) and bolt (can’t remember where I got it.) Worked fine. Less than a year later, same thing: bolt and bushing lost somewhere over WI! What am I doing wrong? If I tighten it too much, it binds. Is there a special bolt that goes into the cowl flap nutplate? Lockwasher? Quote
EricJ Posted July 10, 2020 Report Posted July 10, 2020 On 7/9/2020 at 10:24 PM, PeytonM said: One of the bolts on a hinge point on my right cowl flap departed the airplane, so I purchased the replacement bushing (McMaster Carr) and bolt (can’t remember where I got it.) Worked fine. Less than a year later, same thing: bolt and bushing lost somewhere over WI! What am I doing wrong? If I tighten it too much, it binds. Is there a special bolt that goes into the cowl flap nutplate? Lockwasher? Expand Do you still have the captive fastener that's riveted to the cowl flap? If so, that may need to be changed if it isn't holding the bolts in place. There should be a thin, smooth washer between the bolt head and hinge that allows the bolt to move in the joint with minimal friction to the bolt head. Also, make sure that the bushing is really isolating the hinge from the bolt, i.e., there's not sufficient gap that the hinge gets between the bushing and bolt and grabs the bolt. Mine nearly sawed through the bushing and the bolt before I decided there was too much play and changed it. Quote
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