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Post by canuck on Apr 2, 2024 13:39:47 GMT
I need your help chaps. While I fiddle about under my car , and have the exhaust system removed I think it time to put things ' more right' than they are. I feel this may be a long shot, I am hoping one of you may have the OE rubber bits, (below) fitted to your car or in your 'junk' box to reference. I am looking for factory dimensiions of the rubber isolators used to keep the exhaust system in place. Both at the silencer, #32 and the rear hanger #41, #21G2035 & #ACC8377 respectively Thankfully my car still wears all the factory hardware, plates etc. but the rubber hanger bits are cut offs of a reinforced rubber sheet, a tad stiff, and looking long in the tooth. I am told by the club spares that these isolators are NLA, and am not surprised. If one of you has these rubber isolators fitted could you provide me with the overall length, holes centreline dimensions and the thickness? I am certain I can find something better than I currently have. Thanks Bruce Attachments:
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Post by jonnyb on Apr 2, 2024 19:29:39 GMT
I am sorry Bruce my hangers are just straps/nuts and bolts. However, if you have all the hardware can you measure them and by comparison with the parts list diagram, estimate the dimensions for the rubber parts. Hopefully though, someone will actually have a set. Good luck!
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Post by tonyhosk on Apr 2, 2024 21:01:09 GMT
Likewise I'm afraid. There can't be many survive all this time. Hope you prove me wrong.
Tony
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Post by canuck on Apr 3, 2024 12:54:38 GMT
Thanks chaps, as I suspected these will be as rare as hens teeth. I vaguely recall having some perished parts on my car when I first did the refit, 15 years ago, (garage tip? Don't Get Old ) So there is a chance I may have a baggie of crumbled rubber bits in my parts mine, but I will need to rummage to find them. What I show is an old rubber conveyor belt that I cut up. One of my local car guys suggested strips cut from old tire sidewall, Umm? Another question; I never fitted this front support, actually I never paid attention to it. I suspect its intention is to help keep the troublesome exhaust pipe to manifold clamp integrity? I can easily enough fashion a working example, but let me ask, does the #13 strap fasten to a bellhousing bolt? What have you chaps done? Can you snap a photo for me? Bruce
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Post by 2robert4 on Apr 3, 2024 14:10:19 GMT
Hi Bruce The bracket does fasten to the Bellhousing bolt. The clamp and bracket are essential to stop the exhaust working loose in the clamp or the fracture of the bottom of the manifold due to vibration and stresses induced by the exhaust assembly to the manifold during normal usage.
I purchased the bracket and the circular clamp from NTG motor services Ntgservices.co.uk as the parts are the same as the ones fitted to the MG Magnette and Wolseley 15/50 & 4/44 Clamp part number GEX7072 Bracket part number ACH5002 both are stainless steel. Unfortunately they do not appear to have any rubber mountings suitable for our Riley's.
The tip you were given regarding using an old tyre sidewall/ tread to fashion mounting straps is not as unlikely as you may think I have seen it done many times in my previous garage life and they do last well.
The figure of eight rubbers look to me to be of a similar shape to ones used on certain Japanese cars of the 1970's /80's so you may have some luck there? May I suggest an old established Exhaust fitting company or Japanese specialist who might have something that will do the job.
Good luck with your endeavors
NP
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Post by jonnyb on Apr 3, 2024 14:34:34 GMT
Yep I agree with NP it attaches to the bellhousing bolt close to the tacho drive. The PO of my car used a DIY version which picks up that bolt and the one below with a solid but inelegant bracket and exhaust clamp. Getting my phone down there was a challenge! I am ashamed to post this pic but bellhousing bolt is arrowed and exhaust flange clamp ringed.
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Post by canuck on Apr 3, 2024 19:40:25 GMT
You chaps are the best. You provide excellent intel for me to digest. I appreciate the info for the pipe front steady clip. The Riley factory IPL calls up #1D1484 and the only reference I found is as you mention Nigel for the Magnette, (Z & ZA), and certainly a direct contemporary. Curiously my car has soldiered on, without this clip for at least the last 15 years without a joint failure. Perhaps I should go out and buy a lottery ticket this evening? However the part #GEX7072 puzzles me. The many references I find are Midget/Sprite, Mini etc. application. I am surprised to know that the Riley has such a 'small' diameter exhaust pipe and same as the 'A' series engine. Sadly the sites that offer this clip provide vehicle fit and not physical dimensions. I have done some backward engineering for the isolators. As I mention I still have the OE hardware including the fasteners. When I assemble the bits I can safely deduce the isolator was/is 5/8" thick. This parameter should help in my search. There appears to be lots to choose from, plethora modern applications to classic Alfa's etc. so ............... I will let you know what else I find out. Jonathan, that is a great photo once I rotate it bottom to top, and without a doubt a solid solution. Salut Bruce
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Post by canuck on Apr 4, 2024 20:50:44 GMT
So you chaps have convinced me that the front exhaust pipe of the Riley is the same diamter as the 'A' series exhaust. Weird indeed, but I get it. So, this front clamp of pipe to manifold can be problematic. Have any of you used the 'improved' cast clamp used on Mini, Morris Minor etc.? for this pipe to manifold joint? This clamp looks much more resistant to loosening and distorting. Thanks Bruce
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Post by 2robert4 on Apr 5, 2024 7:26:19 GMT
Hi Bruce
I have had such a clamp on my exhaust for some time now and have had no loosening at all or any blows from the joint, brass nuts must be used as I am sure you know.
NP
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Post by canuck on Apr 5, 2024 18:44:38 GMT
Thanks Nigel, I will have a think on whether this is needed on my exhaust system. My steel stamp clamp one appears in good order. Another question now, I notice another hanger on the IPL; this appears to be part way along the length of the pipe and resembles the rear hanger although a tad different. I don't have any of these bits so I will need to fashion a facsimile. I beleive I found a couple of pictures of this intermediate hanger, and its location on the http://WWW. This hanger appears to attach by the shoulder stud #24 to the crossmember? I have never noticed a hole there but will have a look next I am at my car. Any of you have this on your cars? I suspect yes and can you snap a photo for me. The absence of this support may explain why the front pipe of my silencer failed? Thanks Bruce
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Post by 2robert4 on Apr 5, 2024 20:05:46 GMT
I know that I do not have this clamp in place but I will check for the mounting hole tomorrow. It might pay to check the parts book to see if this mounting was deleted after a certain chassis number?
NP
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Post by canuck on Apr 5, 2024 20:51:13 GMT
It might pay to check the parts book to see if this mounting was deleted after a certain chassis number? Nigel,, You are the best. Yes I need to pay attention to the RH column of the IPL. This support assembly appears to have been deleted after #8160 LHD for me. My car is 101> so of course not there. Curiously the car I 'borrowed' the photos from is much earlier at #4461 so this explains its presence. I wonder if the silencer pipe (s) configuration changed and the rear pipe and silencer were all one part? My system is bespoke and includes a front pipe, an intermediate pipe, silencer and tailpipe. My exhaust system is mega solid after all these years and miles. The only damage is to the front inlet to tghe silencer so I am thinking metal fatique from flex? I will investigate what it will take to install a working hanger, this may mitigate further damage to my silencer. I think I am good to go with all these bits now. I just need to roll up my sleeves and crack on. Salut Bruce
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Post by cygnet61 on Apr 7, 2024 14:26:00 GMT
Same as you Bruce. Original hardware but the rubber appears to be homemade out or two layers of rubber, possibly tyre wall.
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Post by canuck on Apr 7, 2024 18:26:05 GMT
Same as you Bruce. Original hardware but the rubber appears to be homemade out or two layers of rubber, possibly tyre wall. Thanks Gordon, I suspect this is the norm these days. My tailpipe hanger looks just like yours, with a couple of layers of rubber. I did a rummage around my parts mine and found a baggie of old OE bits that I vaguely recall saving. Actually quite incredible what type of old parts I keep. Anyway this shows a crumbled perished silencer hanger 'figure 8' isolator and a 'petrified' and cracked tailpipe hanger isolator. I assembled the silencer hanger and all is per the parts list. Both these rubber parts are well past their best before date. More important to this find is the distance tubes for the bolts. I found 4 of these distance tubes so I think I may be able to get creative with a 'modern' rubber isolator? There is a moral here, to don't bin anything? More to follow for sure. Bruce
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Post by ozieagle on Apr 9, 2024 19:55:05 GMT
Hi Bruce, I'm a bit late to this discussion.
I have used push bike inner tube rubber to make "temporary" hangers. Still there after several years, though.
Herb
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