sprung a leak the other day after hearing something bang under rear of car....got home to find half a tank full disappeared. managed to catch a bin full of the stuff and can see the small puncture hole quite easily accessible from underneath. any easy ways of sealing this? I very busy at the mo and cant spend much time fixing it so was thinking of getting a local garage to sort it for me...any idea of cost? anyone had this happen to them?
Drain tank completely..... Hammer up slightly at point of puncture (this prevents fluid coming down)... clean really well with 40 grit sandpaper...... degrease with clean PETROL....... a product called "JB WELD"... a two pack resin..... mix a small amount and seal the hole first.....let dry (10 mins) mix a larger amount and apply over the first filling... let dry.... apply again over until the depression is level.... I have sealed a lot of tanks with this method......
1..... Clean area
2......dent in puncture
3....... degrease
4....... apply JB Weld in layers.
Yup! I'll go with that advice! JB Weld is the absolute Bees Knees!
I repaired a cylinder head with it several years ago. The C/H gasket had blown from #4 cylinder to the outside world and the metal of the head had eroded (although I didn't notice at the time of reassembly with a new C/H gasket!). Two months later - gasket goes again!
Whips head off to find metal significantly eroded at the same failure site as last time! Faced with a £300 cost for a new head, I browsed my local "car accessory shop" and discovered JB Weld.
Good for 600deg C. So I gunked it on the failure point of the head, waited
24 hours for it to set rock hard, and then flatted it smooth with 600 grade Wet and Dry on a block of wood.
That head did another 45000 miles before I sold the car with no further problems!
JB Weld rocks!
Oh, Its good for petrol tanks (all types) too! Just follow the instructions
*to the letter* and DON'T force heat it to make it set quicker! It *really* takes 24 hours to set!
I've also used it. I repaired a main bearing cap where the thrust washer had disappeared allowing the web of the crank to take off metal. It was either that or scrap the engine (3-cyl Perkins diesel). That was 4 years ago.
I noticed a previous poster said it dried in 10 mins. As far as I was concerned it slowly went off over about 2 days. The temperature was as you get in March.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.