Tyre Overheating

Saxon66

Saxon66

Joined
May 10, 2016
Posts
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Location
Norwich
Funster No
43,013
MH
CI Mizar gtl living
Hi, can I get some advice from the technical hive mind?

We have only used our MH for one weekend so far this year and all was well with it. I took it out for a run yesterday just to turn the wheels and after about 12 miles our TyrePal was showing that the driver side rear tyre was a lot hotter than the others, the pressure was substantially higher too (climbing to over 95psi whereas the other rear was sitting at 90). What would cause this, could the tyre have deteriated over a couple of winter months?

Thanks in advance

Mike
 
Also check your brake calliper is releasing. If brake binding will heat up hub and tyre and hence increase pressure. Sorry also check handbrake is releasing may have stuck on over winter
 
Our offside rear is usually 3 psi more that the nearside once hot. I wondered if it had anything to do with the exhaust being on that side.
 
GeoffChausson said:
Also check your brake calliper is releasing. If brake binding will heat up hub and tyre and hence increase pressure. Sorry also check handbrake is releasing may have stuck on over winter
Click to expand...

This would be my guess too, hand brake is stuck on on that side...

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If you can, jack the vehicle up and spin the wheel by hand.

You will experience some resistance to turning but it shouldn’t be hard work to spin the wheel. If it is, you have a brake binding or a bearing problem.

Ian
 
Our Tyrepal often reports one wheel hotter than the other side - but it's usually 'cos that's the sunny side (we like travelling in sunshine :D).

I'm with the dragging handbrake (or maybe wheel bearing?) brigade.
 
I suspect a dragging brake as well. (y)
 
I had an old car where the handbrake cables themselves started getting tight. They lightly held on the handbrake and the first thing we noticed was a clunk as the brake shoes detached from the metal backing. Luckily it was near home so I just limped it home as I wasn't sure if a wheel would decide to lockup if the (now loose) shoe shifted.
New cables, shoes and drums from ECP cured it!
 
90psi?

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Swop tyrepals to confirm it's actually reading something not faulty.

Have you got extra load on one side?

Is the tyre iffy? Aged or worn or has a bulge/kerb'd
 
Wh05apk said:
90psi?
Click to expand...


The makers recommended tyre pressure is in a cold tyre and on my old motorhome this was advised at if I remember correctly 5.5bar.

When the tyre get warm that will increase.

I would think the result of 90psi is not massively over normal running temperature.

But the temperatures should be similar across the axle.
 
No way can the heat from brakes get to the tyre. Don't forget the tyre is in a 60 MPH wind all day.
 
Mine drives for hundreds of miles at an elevated pressure the drops back after a few minutes stop.. It also sounds if we go around a roundabout anf the sway put the pressure up a couple more psi with the cornering.. Happens a lot in France nowadays about every few miles a new one has appeared. I will have to put the limit up a bit more.. Before these things were fitted , we never know and were quuite happy.

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Wh05apk said:
90psi?
Click to expand...
Yes, the rears are 80psi cold and the fronts 64.

I've re-checked the cold pressures using a pressure gauge and made a small adjustment but I don't think it's enough to have a huge effect. We'll take it back out again tomorrow to see what it does. If it happens again then I'll swap out the sensors to see if there's a fault.

Failing that, it'll have to go in for a brake check.

Thanks for the advice folks.
 
90PSI ?? What did you inflate them to ?
Was the tyre hot to the touch ?
 
Gizmouk said:
90PSI ?? What did you inflate them to ?
Was the tyre hot to the touch ?
Click to expand...
The pressures (80psi rear) were taken from tyresafe.org after entering the tyre size and weight of the vehicle. Nope, they weren't particularly hot to the touch either.
 
This is what happened to ours when we had 215/70 Continental Camper tyres and followed the 80 rear 65 front advice. Touring in summer around France we often had 95psi and nearly 40 degrees. Since changing to 225/70 non Camper tyres and running much lower pressures they vary very little in pressure and the temperatures are below 30.
 
hilldweller said:
Our offside rear is usually 3 psi more that the nearside once hot. I wondered if it had anything to do with the exhaust being on that side.
Click to expand...
Thats exactly the conclusion that I came to the os rear is right in the hot exhast air flow ours always runs a few degrees hotter then the others.
I havent got round to driving 20 miles in reverse yet to see if it swaps to the os front to confirm :D

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My trailer tyres are set at 72 but on the drive from La Manga to Aranjeuz today one went to 88 and the one on the sunny side went up to 91.
 
Here's an interesting update to this tale:

We solved the overheating problem and as suggested, it was a binding brake.

But following the comments suggesting that the original tyre pressure was way too high I finally got around to doing everything properly and got the Moho weighed fully loaded and then contacted Continental tyres for the correct pressures. The results are vastly different from tyresafe.org:

We're running Continental Vancamper (225/75 R16 CP) tyres. The actual weight of the van comes in at; both axles 3900kg and rear axle 2220kg which is thankfully under our 4005kg total limit. Giving Continental these figures and they came back with 43.5psi front and 68.9psi rear. That's 11psi difference on the rear but a massive 20psi on the front!

The front is virtually the same as we put in our car, could they have made a mistake and how us it so different from tyresafe.org???

Cheers, Mike.
 
Saxon66 said:
We're running Continental Vancamper (225/75 R16 CP) tyres. The actual weight of the van comes in at; both axles 3900kg and rear axle 2220kg which is thankfully under our 4005kg total limit. Giving Continental these figures and they came back with 43.5psi front and 68.9psi rear. That's 11psi difference on the rear but a massive 20psi on the front!

The front is virtually the same as we put in our car, could they have made a mistake and how us it so different from tyresafe.org???
Click to expand...

Sounds right...

7D6BDA59-707D-4CFD-9946-CAB2ED31686E.png
 
We have TyrePal and pressures are regularly high 80s on sunny side after driving a few miles never had any problems.
As already stated if using Michelin advice on pressures on the back 5.5 bar and front 4.5 bar.???

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My 70 psi cold ends up being 77-78 psi on the motorway pretty regularly in the UK and that's on a 3850kg plated MH with 215/75/16 Conti Van contact 100's.
Temps hover around 37°C in summer.
Door sticker says 80 psi all round for mine, I'm happy with that TBH.
 
TyrePal for me has been the biggest disappointing gadget purchase ever.
I’ve had nothing but hassle with it.
Either it loses Wi-fi connection, I lose one of the tyres off the monitor or i have to re inflate a tyre as it’s taken such a while to register when screwing it onto the valve.
And that’s with decent brand new batteries in.
This summer holiday trip to La Garda I took the monitor off the dash before I got to Hull as half the tyres were alarming for overheating and the other half failed to show on the monitor. Bloody crap!
 
This the one i have, have not had to touch it since plugging it it approx a year ago.
9EB05496-6AAE-4B1A-8F98-543D16D1C8FE.jpeg

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