wd40 or penetrating oil

[Tom K.]

i am about to start a body-off on my 65 roadster. any advice on using wd40 or penetrating oil to losen 43 year old bolts. thanks

[Chris D.]

Re: wd40 or penetrating oil

Hi Tom

The best stuff I have found is called Kano Aerkroil (spelling?). It's made in Nashville Tn. Spray it on and let it work, sometimes overnight. I think you will break a lot less bolts. I have had very poor success using WD40 on badly rusted fasteners.

Chris

[Bob S.]

Re: wd40 or penetrating oil

I've used Kroil successfully for about 6 years. I'm convinced it's superior to WD40, PB Blaster, liquid wrench.

A couple of weeks ago I did a quasi-experiment on the entire exhaust system of the '67 I bought last January by putting Kroil on half the nuts and 'Deep Creep' on the other half. I didn't find any difference between the two (all were easy), but must admit that I didn't try loosening a single nut w/o penetrant. (Could the fasteners have not been as corroded as they appeared?? I only considered they must be rusted solid since the date on the Midas records which came with the car indicated the mufflers were installed in 1974!)

However Deep Creep is somewhat easier to obtain than Kroil, at least here in central North Carolina.

WD40 was designed for water displacement (i.e. WD).

Bob

[Stephen B.]

Re: wd40 or penetrating oil

G.M. makes a penatrating fluid called heat valve lube it is a little pricey but have worked for gm for over 30 years and is the best I have used for the buck There is a new fluid they are using to get the glow plugs out of the duamax heads but can not think of it from the top of my head a google might find it . it is used a lot by old tractor and truck restorers but takes a few days to work it is a very good last resort will get the name tomorrow Steve

[Michael W.]

Re: wd40 or penetrating oil

WD40 has it's uses but effectiveness as a penetrating oil is not high on the list.

[Tom K.]

Re: wd40 or penetrating oil

thanks all for the input, i'm glad i asked first

[John H.]

Re: wd40 or penetrating oil

Kroil, PB Blaster, and the GM Heat Riser Lubricant are excellent penetrants; WD-40 is NOT.

[John D.]

Re: wd40 or penetrating oil

i am about to start a body-off on my 65 roadster. any advice on using wd40 or penetrating oil to losen 43 year old bolts. thanks

Tom, I have wonderful success taking apart rusty POC FI units with PB Blaster penetrating oil.
PB Blaster is wonderful stuff. I buy it by the case. Readily available and inexpensive. John D

[Lou C.]

Re: wd40 or penetrating oil

PB Blaster has worked well for me also.

[David Z.]

Re: wd40 or penetrating oil

I have used PB Blaster and Kroil (Aerokroil). Both work well. Kroil seems a bit better (but that might be my imagination). You can get Kroil from Kano labs here:

http://www.kanolabs.com/

I got mine at Cabelas in the gun section but I haven't seen it there lately.
PB Blaster you can get at your local auto parts places.

Dave Z

[Edward B.]

Re: wd40 or penetrating oil

Corrosion-X and Kroil are the best penetrants you can use. Give either one time to work and the fitting will come apart.

[Tom K.]

Re: wd40 or penetrating oil

i found pb blaster this morning at tractor supply and it worked within a few minutes, i sprayed the body mounting bolts and will re-apply tomorrow, i'm confident that it will work too. thanks again all

[Brian M.]

Re: wd40 or penetrating oil

PB Blaster works great, just don't use it inside the car, it will smell for months.