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Shudders when enginebraking
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Hope the rain stops enough to go outside and test, if it work leave the pulse wire as they are. John
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| Wed Jul 13, 2016 7:47 am |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Exactly my plan! I hope it will be dry this evening, but it looks depressingly grey outside...
Harold
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| Wed Jul 13, 2016 2:18 pm |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Just had a testdrive, and it runs like it should now Also the tacho's shows a more accurate amount than at first. At idle it seems to show a bit to much, and also it seems that the engine revs quicker than the tacho shows, but maybe that's just in my head and does it rev less than it sounds. Harold
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| Wed Jul 13, 2016 8:17 pm |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Unless you have a known accurate rev counter there is no way to check it, not like a race car where you change up at a known peak revs, usually using a change up light and have a rev limiter to cut ignition if you over rev, in a road car it is more cosmetic John
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| Thu Jul 14, 2016 7:01 am |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
After replacing all steadybar-rubbers there still is a Judder when enginebraking, it seems a bit less but still. Also I have an oil-leakage somewhere on the left (distribution) side of the engine, a few drops land on my floor after everytime after I have driven it. Don't know yet where it is coming from, it's all so tight and dark around there...  Also there is a vibration in my steeringwheel, at about 80km/h (50mph), I already had my front wheels balanced but no large improvements since. It's alligned correctly, wheelbearings seem okay, checked all nuts from suspension, don't really know where to search now, any ideas? It has MOT soon, oilleakage is a MOT-failure right? Harold
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| Fri Jul 22, 2016 12:38 pm |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Hi Harold I'm a bit confused by you very good Dutch English, distribution side of the engine, do you mean by the distributor? if so you have and oil pipe front the filter housing to the block and also a a pressure sensor for an electric temperature gauge or in my case a nipple for a mechanical gauge. I don't know how you had the wheels balanced? but I prefer it done with the wheels on a machine not balanced on the car. John
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| Fri Jul 22, 2016 12:47 pm |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Haha, I keep on confusing you with my outstanding Dutch/English. I mean the left side of the engine, not where the clutch is, but the other side, where the timingchain lives. Timingchain = distributieketting in dutch. (I don't charge for Dutch language lessons  ) The wheels where balanced when not on the car. I have thought off bended brake discs, but don't notice extra vibrations when braking. Somehow the vibrations seem to get worse the longer you drive....
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| Fri Jul 22, 2016 5:37 pm |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Timing chain covers are well known for oil leaks along with the crank oil seal behind the pulley for for the water pump/alternator drive, I always use a good silicon sealer like Hylomar when assembling them. so the dutch for chain is very similar to German ketten, as they say here I go learn am small small! Vibration when braking through the steering gets worse the longer you drive, are your brake caliper pistons sticking a little, making the discs hot and heating the hubs to make more clearance in the bearings, allowing a little shake?? I also thought about your vibration when engine breaking, I have not had this so I am guessing, could the bushes in the "Diva" gear be worn and allow the clutch/flywheel to vibrate on the end of the crank when engine braking?? It may be something you have to live with until you need to strip the engine  I think you may be busy this weekend apart from watching super Max on Sunday John
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| Sat Jul 23, 2016 7:37 am |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Hi John, I will have to search where the oil is coming from, hopefully I can find time this weekend. In Dutch we have all kinds of influences, German, English, French, we are a small country and have to live with it. Alltough I do not like our history in south Afrika, I do like the language there, kind of creative Dutch, with some nice words. As I tried to explain I don't feel extra vibrations in when braking, so warped brakediscs are not the issue I guess. Sticky pistons in the calliper I recently experienced on my Subaru Outback. Was not very funny as it indeed Got worse the further you went, untill it became undrivable. The hub and wheels became very hot then, with the GTM I don't think they do. About the judders when enginebraking, I have also thought about it coming from the engine/gearbox internals, but First things first, getting it through mot... What do you think about Max his chances in Hungary? I think he will drive to a second place. Harold
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| Sat Jul 23, 2016 8:19 am |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
The Dutch language is having many things in common with Flemish and Afrikaans I think? After a drive feel the the temperature of the hubs with your hand if they get hot suspect sticking pistons, I had a bike front brake do it, had me off and down the road, torn ligaments in the right knee and on crutches for 2 months ouch First Max has to out qualify and finish in front of his Team mate John
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| Sat Jul 23, 2016 8:32 am |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Dutch is the "parent" of both, flemish isnt even an official language, it's Dutch with an accent. Last time I felt the rim, but left was not hotter then right or the other way around. Not hot at all really. Sticky brakepistons on a bike are even worse than on a car, as you have noticed If Max doesn't qualify in front of Ricciardo, he will overtake him, he always does Last time he qualified well.
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| Sat Jul 23, 2016 8:47 am |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
I will tell my "Flemish friends" they speak Dutch with an accent I had sticky pistons on 2 different bikes, both with Nissin calipers, they make the piston from a thermo setting plastic that seems to swell with age, I made new stainless steel pistons to cure the problem, should have sued them I guess For your vibrating when braking, are your hub bearings just a little loose, I'm sure its not the discs bent, you would feel the peddle pulsing almost like ABS, if they were bent. I would like to see both Red Bulls do well, if only to see somebody else up front for a change. John
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| Sat Jul 23, 2016 9:22 am |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
You might upset them Just to make it clear, the vibrations are in the steeringwheel, at certain speed, NOT extra when braking, no vibrations in the pedal either. Just looking for a cause. Wheelbearings seem allright, allignment is okay, al nuts are tightened, no bend discs... Max likes the Hungary circuit, hoping for a good race.
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| Sat Jul 23, 2016 12:22 pm |
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kano nordie
On the Road
Joined: Wed Jul 31, 2013 11:47 am Posts: 967 Location: Kano north Nigeria GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Do not go at a certain speed  slightly slower or faster?????? John
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| Sat Jul 23, 2016 3:30 pm |
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Yoda74
Looking like a GTM
Joined: Thu Sep 10, 2015 7:54 am Posts: 229 Location: Uden (Holland) GTM: Cox/Coupe
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 Re: Shudders when enginebraking
Well it's hard to go to higher speeds without going through that vibrations area ... Just went for a drive, the steeringwheel vibrates at about 80 km/h, sometimes it vibrates more, sometimes less, no hot wheel left or right. When braking it often pulls a bit to the right at first and than goes straight. Allready adjusted the brakes at the rear. Took the left front wheel off, the disc is shiny on both sides, seems to brake evenly on left and right side of the disc. I don't think the brakes cause the vibrations, must be something else. The oilleakage seems the come from the left enginemount region. Hard to say where exactly, hard reach in there with spanners too. Did you see the qualifications John?
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| Sat Jul 23, 2016 4:18 pm |
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