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Rattling heat shield


jonny123456
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I noticed a rattling (when stationary/going slow), and when I looked under the car it looks like (what I think is called) the heat shield has dropped onto the exhaust, and is causing the racket.

Has anyone else with an Avensis had this?

I went to a local independent who recommended just removing it, but reading online the general consensus seems to be the manufacturer will have put it there for a reason, so it should be replaced.  I don't have the facilities to get under it myself and bodge do a quick fix

Before I call Toyota spares, is the part just known as an exhaust heat shield?

Any ideas on what a repair should cost?  And if it's necessary (I suspect it is)...

 

1819317605_avnsisexhaustheatshield.thumb.jpg.4305f09814b668e328ede9f0a6888dc6.jpg

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I had it on my previous car, more or less same situation as yours. They are clamped together to the body, during the time , this bond slowly fades as the shield works on bumps, wind, etc.

In the end, it gives out and partially rests on the exhaust.

Because of how it was connected to the car, it makes it hard to fix, as the original connections are now holes on the heatshield, as that metal is still clamped to the car.

 

I fixed it using heat resistant silicone glue, and glued it to the car in 3 or 4 places, held for 2+ yrs, when i sold the car, it was still pretty solid.

You can just drive under some crease and crawl underneath, if you dont mind getting dirty.

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This happened on my daughter's Yaris.  Luckily the nuts holding the shield to the underside unscrewed reasonably easy.  I then pop rivetted on some thin aluminium pieces to the heat shield which I had moulded to the same shape as the original with a round headed hammer. Had to do all 3 shields. Good as new. It is a 09 reg car so quite surprised I managed to get the nuts off.

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I am about to repair the rear shield on my Avensis T27 Tourer. I heard a noise and found the shield resting on the silencer. I had been to The Photography Show, Birmingham NEC and back 280 miles return. I only noticed it the next evening when I started the car.

The following pictures show that the aluminium has corroded at contact points with the steel bolts and washers (galvanic corrosion?).  20190319_122350.thumb.jpg.ff490b05cc501360a1857b4758408c61.jpg 20190319_122412.thumb.jpg.e5f5fd1d4be0a0b9a0b3b56e68d7e54d.jpg 20190319_122415.thumb.jpg.ab5e3f6e1b4da723515b85bc57b8181d.jpg  

 20190319_122424.thumb.jpg.714556d71e0a9bcc293b4d1828bf08fd.jpg

The bolts and washers are still in place.

 20190319_123006.thumb.jpg.c56c727ead3fe3df055ea4359bd2381c.jpg 20190319_123038.thumb.jpg.b7649f8fabc4c94c6ed9493355af26cf.jpg

Notice the white stains around the bolts. The first picture shows the other bolt in the background.

 

I have plenty of aluminium which I am using to make a repair. I went to Toyota and it will cost £52+vat, which even the parts person said is expensive!  

Access is easy as my drive is raised so there is a drop to the house. This makes oil changes easy too, as I don't need to jack the car up for access.

Off subject, I saw the new Corolla Tourer in the showroom at the dealer. I is nearly the same size as the Avensis Tourer. 
20190319_160924.thumb.jpg.7a6813d2314d5fb9f06fab917e9339e3.jpg 20190319_160941.thumb.jpg.4b73e8219491618b73f5b77507bfc4e2.jpg 20190319_160804.thumb.jpg.50176133f8f8ce99bf453f32150913dd.jpg

20190319_160539.thumb.jpg.e316e7dfd803cc7118e7707d62e8ac60.jpg 20190319_160559.thumb.jpg.286ff49a0259cc6f6ac1b16df47ffb2f.jpg

I took more photos and looked all the features. There are a couple of things I noticed. Tall rear passengers will notice the top of the door frame below the eye line, so you look down out of the window. Still plenty of room overall. Oh yes the car has a space saver, very important to me. The floor can be lowered for more capacity. There are more things I could say. 

The model I was in is top spec Excel. I want one, but a lesser spec.

I will update on my shield fix.
 

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Update.
Done my fix and the shield is back in place. 

I removed the nut and bolts, with a bit of aluminium shield still on one bolt 20190320_165127.thumb.jpg.bc0ded060fc6b1a6918cea761bf10060.jpg 

The bolts were greased, plus the stud to reduce any corrosion (I hope).

Cut three pieces aluminium for the areas to be secured. Then folded over the two pieces near the edges.  
I drilled holes in the pieces, More grease was added for protection. 

20190320_170714.thumb.jpg.6c4b119db11e7671339a0ea4b55e0344.jpg

Fitting the shield was easy and I didn't remove or lower the exhaust. The bolts lined up fine, and I tightened everything up. 

20190320_174330.thumb.jpg.4f8a729ec76c908556d49112980fdb5e.jpg

The shield is in place and solid. Saved over £62 to replace a shield using materials I already have.

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@ Konrad: 

Interesting that your shields are of aluminium.  The shield i had to repair on my 2003 Corolla was galvanised (electroplated?) steel, and I assumed all shields were of steel.  Maybe aluminium used in the search to save a few ozs and achieve a minimal emissions improvement.  Easier bending aluminium to the required shape.

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I'm now tempted to have a go at this myself...

Is this the type of repair I could do with two wheels on the kerb?  (I don't have axle stands, and know that just using a jack is incredibly dangerous)

Also, where did you get the aluminium?

Would cut up beer cans work, or large washers - assuming they are galvanised?

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18 minutes ago, jonny123456 said:

I'm now tempted to have a go at this myself...

Is this the type of repair I could do with two wheels on the kerb?  (I don't have axle stands, and know that just using a jack is incredibly dangerous)

Also, where did you get the aluminium?

Would cut up beer cans work, or large washers - assuming they are galvanised?

I had the aluminium from long ago and some from a friend, a few years back. The aluminium is thicker than drinks can. The holes are too big for any washers I had, but if you do have any suitable washers, they should do. Just make sure that the shield material around corroded area is good!   

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14 hours ago, Notoyboy said:

@ Konrad: 

Interesting that your shields are of aluminium.  The shield i had to repair on my 2003 Corolla was galvanised (electroplated?) steel, and I assumed all shields were of steel.  Maybe aluminium used in the search to save a few ozs and achieve a minimal emissions improvement.  Easier bending aluminium to the required shape.

And i here always thought the shields are aluminium, at least on 2004 or so cars and newer. I think older models in general did have steel.

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13 hours ago, Konrad C said:

I had the aluminium from long ago and some from a friend, a few years back. The aluminium is thicker than drinks can. The holes are too big for any washers I had, but if you do have any suitable washers, they should do. Just make sure that the shield material around corroded area is good!   

Thanks for all the info, it's been really helpful.

Do you have any idea what M-size/diameter the bolts were?

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19 hours ago, jonny123456 said:

Thanks for all the info, it's been really helpful.

Do you have any idea what M-size/diameter the bolts were?

I didn't check the bolts for 'M' size, but I used a 10mm socket and spanner for the bolts and nut. I did use 8mm drill bit to make the holes, which was perfect fit.
As a guess, I would say M6.

Edited by Konrad C
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Sorted!

Thanks for the inspiration!  After parking 2 wheels on the kerb, I just managed to squeeze myself under.  Fortunately, it has only rotted away at one point (I think), and I managed to fix it with a washer.  I've no idea if the washer is carbon steel, or stainless steel, if it'll react with the aluminium, or just keep it held up, but for now at least the car is once again rattle free 😄

Before:

20190323_112625.thumb.jpg.9481af769e7dd35831a3bb00884f7109.jpg

20190323_112653.thumb.jpg.8dfd42cc4c43f7c92aa6557d32d59048.jpg

After:

20190323_131017.thumb.jpg.d1bb8af896f5b85ef4af090462a9a100.jpg

20190323_131032.thumb.jpg.b5c47fe83494320bcd88f9a09de1d6e9.jpg

20190323_131051.thumb.jpg.40768bea8fd1cdff41d24afc8e0ffbdd.jpg

 

 

 

 

 

 

 

 

 

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I got a new one from Amayama, it came all the way from Japan and was half the price that my local main stealer wanted for it.

It was a genuine Toyota part and was even stamped "Made in Britain".

So from Britain to Japan and back again and still half the dealer price.

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  • 3 years later...

Thanks guys. Rattling started around five days ago, just as I was leaving for an 800 mile round trip. Sounded light and around the exhaust, in front of rear right wheel, but I wasn't dressed for crawling around underneath, so left it, and worried, until I got back. Checked online and found this forum, and indeed the heat shield (aluminium) had simply worn/corroded through around the fixing bolt and washer, and dropped down one end. Removed the bolt (10mm socket) after spraying WD40 and a few in/out manoeuvres to ease the thread (not spraying the exhaust!), and cut a large aluminium washer from an old scrap lightweight shelf, drilled a 6mm hole, bolted it on and no more rattle.

No facility to get under the car, so did this from one side at road level, but was able to get a phone/camera under, and there isn't another corroded-through bolt, so fingers crossed that's it for a few years.

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On 3/15/2019 at 8:49 PM, jonny123456 said:

I noticed a rattling (when stationary/going slow), and when I looked under the car it looks like (what I think is called) the heat shield has dropped onto the exhaust, and is causing the racket.

Has anyone else with an Avensis had this?

I went to a local independent who recommended just removing it, but reading online the general consensus seems to be the manufacturer will have put it there for a reason, so it should be replaced.  I don't have the facilities to get under it myself and bodge do a quick fix

Before I call Toyota spares, is the part just known as an exhaust heat shield?

Any ideas on what a repair should cost?  And if it's necessary (I suspect it is)...

 

1819317605_avnsisexhaustheatshield.thumb.jpg.4305f09814b668e328ede9f0a6888dc6.jpg

see if handy way of just bolting it  it up with a bigger washer or maybe tieing it up with strong wire do rightly and drive it on shouldn't be a big job tbh 

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