underbonnet heat shield question

[kartman24]

heat shield will be in tommorrow, what is the best way to glue it to the bonnet? is it best to take the bonnet off, turn it over and glue the heat shield on, or try and glue it with the bonnet in situ and rest it on things in side the engine bay? also what glue is best to use?--martin

[simpo one]

I'd go for impact adhesive in situ - but I might be wrong.

[GarryM]

Oddly enough, I happen to have a new heatshield and adhesive next to my PC! The adhesive is "GE Silicones, silicone rubber adhesive sealant". Got it when I bought the car 2 years ago and still haven't fitted it! When I do, I'll definitely remove the bonnet. The alternative of a large heatshield blanket flapping around with silicone all over the place and trying to stick it upwards onto the bonnet doesn't appeal. IIRC the Bible suggests leaving the bonnet on but I think I'd make a hash of it that way

[Edt]

I did this few weeks ago... bonnet off (drizzling outside) rested bonnet face donw (obviously) on carpet, and evo-stuck it down with brush, .. bit by bit.

At end took shoes off & gave the shielding a 'Thai girl massage' to make sure plenty of pressure had been given all over.

Decriptions get more creative after a few beers it seems. Anyone else been watching the darts ?

Ed

edited to say you might also enjoy a nice illegal solvent high too

>> Edited by EdT on Thursday 31st July 14:00

[simon.b]

Why would you even attempt to do it with the bonnet still attached, unless like me, you didn’t realise how quick and easy it is to unclip the top ball joints and remove it completely.

Cheers,

Simon.

[2 sheds]

When removing the bonnet its much easier and safer if you have 2 people,
Ed, i wouldn't advise standing on a bonnet even if it is upside down on carpet, thats unless you have very big soft feet
Tim

[EdT]

2 sheds said:

When removing the bonnet its much easier and safer if you have 2 people, Ed, i wouldn't advise standing on a bonnet even if it is upside down on carpet, thats unless you have very big soft feet Tim

understood... dont worry I didnt tread, more of a press with one foot. Must've been the fumes that got me going.

Ed

[kartman24]

ok heat shield has arrived at dealers today, but i`ve been struggling to find a suitable adhesive. the dealer suggested a spray on contact type adhesive, but all the ones i`ve found (3 types localy)have printed on the can `not to be used in applications which get hotter than 50` . i would have thought a griff bonnet gets pretty hot, any thoughts on this? alternativly would evo stick brush on contact adhesive be ok, i notice someone else here has used it and there is no mention of max temp use on the tin.----martin

[simpo one]

You could ring Evo-Stik and ask?

[pebbledash]

kartman24 said:

ok heat shield has arrived at dealers today, but i`ve been struggling to find a suitable adhesive. the dealer suggested a spray on contact type adhesive, but all the ones i`ve found (3 types localy)have printed on the can `not to be used in applications which get hotter than 50` . i would have thought a griff bonnet gets pretty hot, any thoughts on this? alternativly would evo stick brush on contact adhesive be ok, i notice someone else here has used it and there is no mention of max temp use on the tin.----martin

I used unibond contact glue from a builders yard, Its still stuck so must be ok...

[EdT]

kartman24 said:

evo stick brush on contact adhesive

thats what I used, and also still sticking

Ed

[heliox]

heatshield guru says:

This is the best method for replacing the under-bonnet heat shielding..sorry for the delay in response but my keyboard refused to play after a swamping with Tetley.

There are two types of glue that i'd personally recommend,i've been testing automotive glues for years and these two come out on top by performance.

Aerosol spray. Auto Spray Adhesive by Granville,comes in a 600ml can and idealy is very well suited for interior use, its a contact adhesive and is very aggresive, once on thats it. The longest it lasted on a Griff heatshield though was around 2 years.part# 0771
doesn't like petrol/solvents/oil

Dunlop Formula 1,comes in a 1 litre tin and is in jelly form and is also a contact adhesive.Its compatable with oil/petrol/heat and has an advantage over say Evo stick is that it remains flexible forever after curing.Still on a Griff after 4 years.Comes with a spreader,ooh err.part# 000-000-1(i'll confirm this tomorrow)

As has been mentioned before this is definately a bonnet off job which is made easier by 2 people and once off it needs to be laid on something soft..sounds familiar

Before you slap any glue on,mark where the old heatshield is positioned as you need to get the new one sitting in the same place...remove the old heatshield, then remove and clean any left over glue bits or fiberglass strands.Nows a good time to respray the black bits if you want to.

Take the new heatshield and fit it onto the bonnet for a trial fit, you should use the front of the bonnet as your initial alignment,check to see how it fits,its worth marking the edges with a pencil so as you know where to stop with the glue, then remove and lay it somewhere flat as you will need to spread the adhesive on later.

Start with the bonnet first and spread the glue evenly up to your marks then do the same with the heatshield.

You MUST leave to dry, this varies on temp etc.

To help with fitting the newly glue pieces together, I use a sheet of masking paper which is doubled over on itself(don't use furry paper ie news paper etc whatever you do)and this is layed on top of the dry bonnet glue surface, you can now lay the heatshield onto the paper without it sticking.Get the heatshield aligned at the front of the bonnet,once your happy with the positioning slowly pull one end of the paper out exposing the glued sides and gently press together. Do this for the rest of the heatshield.
Refit bonnet, pazaam..job done.

try not to sniff the glue too much

h

[simpo one]

'spread the glue evenly up to your marks'

Sorry, read that as 'spread the glue evenly up to your arms'

[pebbledash]

simpo one said:

'spread the glue evenly up to your marks' Sorry, read that as 'spread the glue evenly up to your arms'

Do not be tempted to do this when even ever so slightly under the influence. as impact adhesives and arm hair DO NOT MIX...


>> Edited by pebbledash on Saturday 2nd August 00:12

[simpo one]

Waxing for real men, eh?!!!

(apologies for hijacking thread; will return it to rightful owner now)

[Toffer]

I used contact adhesive on the boot cover liner but bow to the wisdom of the earlier thread correspondents because of the extreme heat under the bonnet...

Now if it reflects heat...

i did use a regular EVOSTIK type contact adhesive on the edges of the bonnet heat shield a couple of years ago and it is still stuck soooo...

[kartman24]

edT, how did you use the evo stick, did you just put one coat on the bonnet and heat shield, allow to dry and put together (in stages as you mentioned) or did you coat the bonnet and heat shield and put together `wet` as the instructions suggest if one material is porus (heatshild).---martin

[pebbledash]

The unibond stuff flows like a very ripe Brie. porosity was not a problem.

>> Edited by pebbledash on Thursday 7th August 16:04

[K666GRF]

I realise that this is rather a late posting on this topic, but for what it's worth, I have used Wickes Silicone adhesive (not sealant!)on my Griff bonnet heatshield and appear to have had good success. Benefit is that it comes in an applicant tube and so can be squirted into all the right areas, and by tipping the bonnet to the right angle, gravity will get it the rest of the way. It is also relatively cheap at C£7 for a tube.
I used a wallpaper roller to spread it out under the heat shield material.
One tip. You would be amazed at the dirt in a carpet... I would suggest putting a clean cloth sheet down to avoid scratches.