A different pain. 2018 jeep compass.

[Joel Welsh 4769VU]

I'm constantly amazed working on my cooper...
Even though she's been through a restore by a PO, for a 60 year old car- I've only had one siezed bolt that would not come loose.

Today, i had to replace an oil pan on my jeep compass SUV. Already kind of sore about the fact that i had to- because it was leaking due to rusted pinholes in the metal. At 5yrs old! Seriously...

Well, it certainly was not the same joy that i get working on Dianna, i can tell you that.

I just want to know- who was the genius that decided to engineer an exhaust mount bracket at the base of the manifold... that covered the bolt for the oil pan? I wound up cutting the exhaust bolts off with an angle grinder to remove the bracket. Then i had to further cut them, and drill them out- as the studs were siezed in the pipe. Replaced with stainless nuts and bolts.

Something that should have been a relatively straightforward job... became a tedious mess.

Every mechanic knows that exhaust bolts rust, corrode, and sieze up. Why the heck would you put them this way?

4-5 hours to complete the mission. Ugh.

[Exminiman]

The barcode sticker has outlasted the oil pan (sump) , thats bad……

[Peter Laidler]

Some companies/manufacturers will pay you if yoiu submit a good idea to their R&D people. I got £50 some years ago from a motor mower manufacyurer. Just for suggesting that if they put elongated slots in a metal cover instead of holes. You could remove the cover without having to take the bolts out. Just loosen the 3 bolts and slide cover out - and in!

[mk1]

I reckon my Jeep is less rusty than that & it 80 years old this year

It does drop a bit of oil though

[woodypup59]

Just beware the stainless trap.

Stainless bolts are more prone to seizing than mild steel. OK they don't rust, but push the rust somewhere else.

The mini exhaust manifold set up is the ideal - steel studs and brass nuts

[mk1]

I too have never been a great fan of stainless fasteners. S/S is more brittle than traditional high tensile so if it does get stuck, you are far more likely to wind the head off.

[63monte]

Quick tip: if you are going to use stainless fasteners of any kind always,always, always smear with copper slip. It should prevent seizing, it has for me …….. so far

[Joel Welsh 4769VU]

I too have never been a great fan of stainless fasteners. S/S is more brittle than traditional high tensile so if it does get stuck, you are far more likely to wind the head off.

Myself either... but the only place that had them on hand, closer than 30 miles, was a hardware store.

It was either stainless, or galvanized.
Figured they were the least problematic for the now?

[Peter Laidler]

Stainless fasteners. Chaps........ with our level of vibration and torque settings, be rest assured that all is well with stainless steel fixings as supplied by the good commercial outlets. If they're good enough on tank gun platforms................

I'm not a metallurgist per-se Woody, but I don't understand the physics of stainless just pushing the corrosion elsewhere. It doesn't work in any sort of sacrificial way that's for sure. Coppaslip....., always a good idea I say, especially if it gets hot

[woodypup59]

Put simply Peter, the chromium and nickel in stainless makes it more noble than plain steel, which makes the plain steel sacrificial.

If you use zinc plated nuts on plain steel, they are the sacrificial part.

But I'm sure that MIL grade stainless is better than B&Q s/s cheese.