Starter Motor Heat Shield Blanket Recommendations?

Starter Motor Heat Shield Blanket Recommendations?

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Discussion

ukkid35

Original Poster:

6,285 posts

180 months

Wednesday 13th July 2022
quotequote all
I'm loosing solenoids at the worst possible times, so I need to do something

Any suggestions as to what to try for a Tilton 40000-Series Super Starter

stevieturbo

17,534 posts

254 months

Wednesday 13th July 2022
quotequote all
Is this a normal starter that people use on that vehicle ? Do they also have problems ?

Does the factory fit starter not work ?

Are there any OEM heat shields in place ? I dislike wrapping things up, whilst that can protect short term heat....it can also bake things longer term. I like airflow around hot parts where possible.

Polly Grigora

11,209 posts

116 months

Wednesday 13th July 2022
quotequote all
Not a recommendation. You pays your money and you takes your chance with the following



https://www.amazon.com/starter-heat-shield/s?k=sta...

ukkid35

Original Poster:

6,285 posts

180 months

Wednesday 13th July 2022
quotequote all
stevieturbo said:
Is this a normal starter that people use on that vehicle ? Do they also have problems ?

Does the factory fit starter not work ?

Are there any OEM heat shields in place ? I dislike wrapping things up, whilst that can protect short term heat....it can also bake things longer term. I like airflow around hot parts where possible.
It is factory fit, I don't know anyone else who tries to run a Cerbera on track days at the Ring

The first couple of days were fine, but the third was much warmer, and that finished off a brand new solenoid

So, there is supposed to be an OEM heat shield, but I've never seen one

I am also averse to wrapping things, once you wrap the manifolds they become incredibly difficult to fit, and working underneath the car is so unpleasant I'll never attempt that again

I know starter motor wrapping is commonly done with other track vehicles, but like you I prefer airflow, which is why I've not considered it before

stevieturbo

17,534 posts

254 months

Wednesday 13th July 2022
quotequote all
As above, DEI make decent stuff.

Or I see a lot of adverts on FB etc, Funky Monkey or something like that who claim to have wonderful heat protection stuff.

Personally I'd prefer basic shielding, and try and route/allow airflow.

IMO, all blankets and products that insulate will do...is work ok when moving. But when you park up with roasting hot manifolds etc with zero airflow, anything inside those blankets will cook simply through heat soak and they have no ability to cool down because of the blanket.

GreenV8S

30,484 posts

291 months

Wednesday 13th July 2022
quotequote all
On the V8S I wrap an ordinary fibreglass/metal film heat blanket around the solenoid and top half of the starter secured by lock wire. The problem is exhaust heat cooking the starter motor during the heat soak. The starter itself doesn't particularly need air cooling unless you're using the starter excessively so there isn't any harm in insulating it..

Polly Grigora

11,209 posts

116 months

Thursday 14th July 2022
quotequote all
Is this the same as your set-up?


If yes

Can't for the life of me understand how the solenoid is getting too hot when compared to where Rover V8 starters are mounted

Nowhere near the exhausts is it?

You could be unlucky as well as having solenoid temperature problems. New poor quality solenoids could be causing you some pain

Have you bothered to strip a solenoid down to see if its coils or spool have been damaged by heat?


Perhaps the coil/coils are breaking due to poor manufacture or the quality of copper wire used

Something else that you're aware of, solenoid plungers do sometimes stick before achieving full travel

Have you considered reducing the diameter of the plunger by a couple of thou and getting plenty of decent grease in there, it could make a massive difference if temperature really is causing the plunger to tighten due to expansion

bucksmanuk

2,332 posts

177 months

Friday 15th July 2022
quotequote all
Have you thought of not wrapping the manifolds at all, but using these guys?
https://www.zircotec.com/

This ceramic coating is NOT cheap, but it certainly works.

In discussion with a British GT team, I noted their 458 had this coating on the exhaust manifolds. I asked them why they did it. Constant issues with heat soak and part failure, some causing them a genuine worry, and me too when I heard about it! (scrutineer).

They were convinced that in some parts of the engine bay, local temperatures, while racing, had fallen at least 50 °C. A very welcome margin for plastic parts and adhesives.

GreenV8S

30,484 posts

291 months

Friday 15th July 2022
quotequote all
bucksmanuk said:
This ceramic coating is NOT cheap, but it certainly works.
I did mine at home using cermachrome, which worked out quite a lot cheaper although it did also take work, of course. I don't think the changes I saw were quite as big but still very noticeable. It does move more heat further down the exhaust though and you need to allow for that.

ukkid35

Original Poster:

6,285 posts

180 months

Friday 15th July 2022
quotequote all
Polly Grigora said:
Is this the same as your set-up?


If yes

Can't for the life of me understand how the solenoid is getting too hot when compared to where Rover V8 starters are mounted

Nowhere near the exhausts is it?
I found a couple of photos showing the OEM heatsheild, which I will try to obtain








stevieturbo

17,534 posts

254 months

Friday 15th July 2022
quotequote all
Heat shield looks pretty simple to make up.

Another option might be a small fan motor to flow cold air around it after a run when stationary etc.

Polly Grigora

11,209 posts

116 months

Friday 15th July 2022
quotequote all
ukkid35 said:
Polly Grigora said:
Is this the same as your set-up?


If yes

Can't for the life of me understand how the solenoid is getting too hot when compared to where Rover V8 starters are mounted

Nowhere near the exhausts is it?
I found a couple of photos showing the OEM heatsheild, which I will try to obtain





Ok then

Just a thought, I must be missing something, heat rises, the position of the shield will assist keeping the heat in rather than out

Who's going to be first to tell me I'm an idiot?smile Won't be offended in any way

ukkid35

Original Poster:

6,285 posts

180 months

Friday 15th July 2022
quotequote all
Polly Grigora said:
Ok then

Just a thought, I must be missing something, heat rises, the position of the shield will assist keeping the heat in rather than out

Who's going to be first to tell me I'm an idiot?smile Won't be offended in any way
I think the issue is that radiation is a much greater heat transfer component than convection, so yes hot air will rise

However the top plate will block radiated heat bouncing back down from the reflective coating in the engine bay above the starter

Polly Grigora

11,209 posts

116 months

Friday 15th July 2022
quotequote all
ukkid35 said:
Polly Grigora said:
Ok then

Just a thought, I must be missing something, heat rises, the position of the shield will assist keeping the heat in rather than out

Who's going to be first to tell me I'm an idiot?smile Won't be offended in any way
I think the issue is that radiation is a much greater heat transfer component than convection, so yes hot air will rise

However the top plate will block radiated heat bouncing back down from the reflective coating in the engine bay above the starter
Much appreciated, hadn't considered it for one moment

ukkid35

Original Poster:

6,285 posts

180 months

Thursday 20th July 2023
quotequote all
Made one in the end


stevieturbo

17,534 posts

254 months

Thursday 20th July 2023
quotequote all
should do fine

twibs

201 posts

145 months

Thursday 20th July 2023
quotequote all
I'm glad I read this thread, that is a cracking idea