Engine Bushing Replacements?
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- oldtrucksrule
- Posts: 71
- Joined: Wed Aug 31, 2016 12:33 pm
Engine Bushing Replacements?
So, I think it's time to replace the engine bushings "Lord" mounts. My question is, what do I have to remove to replace the bushings? I'm hopeful I can hoist the engine and replace them without disconnecting everything. Any pointers would be great!!
Thanks!!
Thanks!!
- Bruce Fenstermacher
- Posts: 10318
- Joined: Tue Apr 23, 2002 11:24 am
Re: Engine Bushing Replacements?
This is not an easy task. The engine and bushings fit just so. You will be cussing. I've removed and reinstalled 2 engines but I've slept a night or two since so I can't give you any pointers other than this. I'd think you will probably want to remove the exhaust doing this.
BTW, why do you think it might be time to change these. Do you have evidence your engine is dropping such as unequal prop spinner to cowl gap? Many bushing look like hell in a very short time but looks doesn't necessarily equate to them being bad.
BTW, why do you think it might be time to change these. Do you have evidence your engine is dropping such as unequal prop spinner to cowl gap? Many bushing look like hell in a very short time but looks doesn't necessarily equate to them being bad.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
- oldtrucksrule
- Posts: 71
- Joined: Wed Aug 31, 2016 12:33 pm
Re: Engine Bushing Replacements?
Bruce Fenstermacher wrote:This is not an easy task. The engine and bushings fit just so. You will be cussing. I've removed and reinstalled 2 engines but I've slept a night or two since so I can't give you any pointers other than this. I'd think you will probably want to remove the exhaust doing this.
BTW, why do you think it might be time to change these. Do you have evidence your engine is dropping such as unequal prop spinner to cowl gap? Many bushing look like hell in a very short time but looks doesn't necessarily equate to them being bad.
They're pretty cracked and certainly sagging. I'll try to get some pictures and see what the condenses thinks.
Re: Engine Bushing Replacements?
Just to be certain of your question, the firewall mounts or the isolator mounts of the engine legs ?
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
1953 C170B S/N 25656
02 K1200RS
- oldtrucksrule
- Posts: 71
- Joined: Wed Aug 31, 2016 12:33 pm
Re: Engine Bushing Replacements?
Engine mounts not firewall
Re: Engine Bushing Replacements?
These are replacement items at engine overhaul or removal. If you look at the sample you’ll see the isolator is encased in a metal jacket and has a metal core. The ring lip of the metal jacket keeps it from moving in the engine mount leg, the metal core is trapped in the engine mount, so relative movement is the deflection of the rubber.
If you can see actual damage to the mount by actual metal to metal contact, then I guess you need to find an engine hoist but I wouldn’t jump into this unless I was forced.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
1953 C170B S/N 25656
02 K1200RS
Re: Engine Bushing Replacements?
So basically plus or minus the occasional .005 here and there, the gaps should be equal between the isolator and the engine mount ears. Hard to imagine any sagging here unless the rubber completely dis-bonds from its metal jacket which is a bit out there.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
1953 C170B S/N 25656
02 K1200RS
Re: Engine Bushing Replacements?
This mount is about 30 years old, doesn’t look bad and the rubber has no flex to it. That might be a more likely reason to change these at engine overhaul, just to get something more supple to make the super smooth Continental seem smoother, if that’s possible.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
1953 C170B S/N 25656
02 K1200RS
Re: Engine Bushing Replacements?
Can I add to this post the question of where is the best place to procure these isolators?
Thanks
Thanks
N1235D - 1951 170A - SN: 20118