Silly confusion over rad install

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CtrMint
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Silly confusion over rad install

Hey all,

This one is probably really daft but I'm struggling to install my rad and oil cooler on my 420R.  Derek @ CC is being supportive but I'm not quite able to get clarity on whether I've done the install correct.  Rather than pester Derek I thought I might post here.

I have an S3 with the R300 style rad and oil cooler in the same unit.  The documentation in both the 2015 and new style manual doesn't cover it the rad style.

Here is what I've finished with, but I'm sure the bobbin setup is wrong.  Surely I shouldn't have the exposed thread.

My bobbin has a fixed male threaded rod on one side, and a female thread on the other used screw onto the rad.  I don't feel you can remove the male thread and if you could I'm sure the bolt on the rad which is used to screw into/through the bobbin would be too short.

Thanks for the support  

aerobod
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I would use a mounting bolt on the radiator side that has enough thread exposed through the bracket that is about 2mm less than the depth of the female thread in the bobbin, either by using a shorter bolt or cutting the existing bolt.

James

AdamQ
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To me, it looks like there should perhaps be a nut (and maybe a washer) on the bolt on the radiator side of the bobbin to clamp the bolt to the mounting bracket/plate on the radiator, i.e. on the exposed thread to right of the rubber part of the bobbin.  Otherwise the bolt head is surely going to (or is at least likely to) chafe against the radiator itself ...

FWIW ...  Adam

SM25T
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Saw this arrangement in a recent thread. Odd design !
CtrMint
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I can see how an extra bolt and washer between the radiator and the bobbin could secure the bolt in the radiator bracket.  I suppose remaining gap might be for that.

Garage: Caterham 7 S3 420 R, Lotus Toxic Green : Lotus Exige V6 Cup, Lotus Toxic Green. BLOG : https://www.caterham7diaries.com
Petethediesel
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I had the same issue with mounting the combined rad/oil cooler in my 360 kit a month ago. You have it right but need to shorten the bolt length to suit the thread available within the female isolastic mount. Not certain but I recall it was about a 7mm reduction required.

   The combined radiator/oil cooler was introduced a few months ago in place of the separate rad/cooler, so the drawings in the build manual don't match.

PS: When I spoke to Derek on this he indicated that sometimes the rads cam in with over length bolts that needed shortening. As you will have observed, the bolts cannot be removed to do this so its an angle grinder with a decent cutting disc fitted for this job. 

              Pete

   

Pete C

Paul McKenzie
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Lock another nut against the existing one then turn the inner nut and surely that will get the stub out

CtrMint
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Derek @ CC confirmed I need to cut the bolt installed behind the plate on the rad down.

Garage: Caterham 7 S3 420 R, Lotus Toxic Green : Lotus Exige V6 Cup, Lotus Toxic Green. BLOG : https://www.caterham7diaries.com
Petethediesel
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Forgot to mention, once you have measured the thread length required, put a plain nut on the bolt to be cut and tighten to hold the bolt firmly in place on the bracket. This makes it rigid and therefore easy to mark the point of cut and safe to do so. 

Pete C

CtrMint
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thanks,

1 bolt down 3 to go!

Garage: Caterham 7 S3 420 R, Lotus Toxic Green : Lotus Exige V6 Cup, Lotus Toxic Green. BLOG : https://www.caterham7diaries.com
SM25T
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Surely CC need to address this.