Tyres/tires deflating

[Earthwatcher]

On Sunday I came home from a trip (not in the Grenadier, my wife had been driving that) to find the front nearside tyre had deflated - completely flat - so I blew it back up again with my compressor, set at 37 psi, to check for a puncture (couldn't see anything). Anyway it was just the same pressure the next day and the day after so that was a puzzle. That day, Tuesday, however, I saw that the rear nearside tyre was deflating. I blew that up again and left it overnight and when I checked it this morning it was still fine. But the front tyre had deflated again. It's got me scratching my head. Could there be an issue with the valve caps? I'll re-inflate it now to see what happens, but I'm reluctant to take the Grenadier out until I can figure out what's going on. I've ruled out a mischief-maker - we're pretty rural so have a very low yob count.

 

[Eric]

On Sunday I came home from a trip (not in the Grenadier, my wife had been driving that) to find the front nearside tyre had deflated - completely flat - so I blew it back up again with my compressor, set at 37 psi, to check for a puncture (couldn't see anything). Anyway it was just the same pressure the next day and the day after so that was a puzzle. That day, Tuesday, however, I saw that the rear nearside tyre was deflating. I blew that up again and left it overnight and when I checked it this morning it was still fine. But the front tyre had deflated again. It's got me scratching my head. Could there be an issue with the valve caps? I'll re-inflate it now to see what happens, but I'm reluctant to take the Grenadier out until I can figure out what's going on. I've ruled out a mischief-maker - we're pretty rural so have a very low yob count.

This just seems the sort of prank that young kids would do. OK you are rural, but isolated?

 

[Cliffy]

Split or small puncture in sidewall. Only goes down when its bulged on bottom.

 

[Jiman01]

Valve caps doesn’t normally do much to prevent air leaking. They are mostly there to protect your valve stem core.

It does sound very suspicious, like someone is messing with you, but barring that, check to make sure your valve stem cores are tight??

I reread your post and have a question. The following days when your rear, followed by your front, deflated, how many psi are we talking….down to the rim? If its a little bit, maybe you ran over something since it sounds like its happening on the same side.

 

[Karearea]

You need to spend more time with your Grenadier….
This is clearly just some simple attention seeking behaviour

 

[CRH]

sounds like they need resealing on the rims, I had that on one of the wife's cars

 

[CountyV8]

Which. wife?

 

[CRH]

Are you a stickler for grammar or just understand the comer system here in the UK, unlike the rest of us
Answer to your question is no.1/current (sadly), or not depending on how much I would get fleeced for in a divorce
Or are you implying I'm a bigamist?

 

[Earthwatcher]

Ruled out wife after serious interrogation. Not kids, none around here and besides, what self-respecting junior hooligan would let just one tyre down? Have re-inflated front and will check again later. We have had some very frosty weather so maybe that had an influence, but why would it be so random?

First tyre was completely flat, as it was again this morning. Second (rear nearside) was down to about 20 psi and 24 hours after being re-inflated to 37 psi (cold) it was still reading that on the sensor. Two slow punctures are unlikely but not impossible, but that doesn't explain why it wasn't going down two days after re-inflation (until it did, last night and completely flat). These are the Bridgestone tyres.

 

[Earthwatcher]

Re-valve stem core - the valve is thinner on these tyres than those I've been used to and stem core comes almost to the top. I wonder if I tightened the cap right down it could press on the valve? I'd hoped someone else had experienced the same issue but most folks here I believe have BF Goodrich tyres. Wish I'd gone for that option now.

 

[Jiman01]

That is weird. I’d be interested to hear what the problem/solution is once you figure it out.

 

[Jiman01]

Re-valve stem core - the valve is thinner on these tyres than those I've been used to and stem core comes almost to the top. I wonder if I tightened the cap right down it could press on the valve? I'd hoped someone else had experienced the same issue but most folks here I believe have BF Goodrich tyres. Wish I'd gone for that option now.

Reinflate your tires and leave the caps off and you’ll know for sure after a few days. But IMO a valve stem leak would be gradual vs. from your description it sounds like they’re totally good for a few days then flat to the rims by the third day.

 

[terdrocket]

Soak the tires in water and dish soap from a sprayer and look for bubbles