Outer Limits 4x4 Board

I'm planning on moving the motor mount brackets for a new engine.

Mechanics in my part of the world are not at all confident about welding the new motor mount brackets on the chassis. They all talk of stress fractures on the welds. They also claim that if the mounts are not in the correct position engine vibrations etc. could ensue.

Also, is MIG welding suitable for this purpose?

How does one go about doing all this properly? I couldn't find too much info on the internet.

What's the score on the above, guys? Is it really all that complicated?

It is not all that complicated.

MIG welding is fine, get the motor in place and weld in the mounts. Somewhere in the mountings there will be an elongated bolt hole(s) to allow for fine tolerances.

4WD chassis are not high-tensile so you can weld to them and just follow good engineering. Try and make the mount go around one corner of the chassis, or used a spreader plate. (how big is the new motor??)

But, I wouldn't take it to someone that isn't confident in doing the job. Like everything it can be stuffed up so keep looking for someone that is confident in doing the job.

- David.

thinking of swapping in a 1hd-ft in my pzj70.

Which welding type would you recommend: gas, electric arc or MIG?

Many thanks.

my engineer didnt care how it was welded we used a mig

Use a mig. the other ways are outdated ways of welding, they have their purposes but this is not it.

Nuckingfuts wrote:Use a mig. the other ways are outdated ways of welding, they have their purposes but this is not it.

really? i feel that mig is outdated personaly. ARC and TIG are the only way to go with 90% of stuff

dan_7 wrote:thinking of swapping in a 1hd-ft in my pzj70.

Which welding type would you recommend: gas, electric arc or MIG?

Many thanks.

Umm, when we sort out that Nissan's are better than Toyota's we can start on this one.

Welded correctly doesn't matter, I use MIG because the mounts are going to be made from a substantial plate and my MIG is larger than my TIG. I am also crap at ARC because I rarely ever do it.

If you had to gas it then so be it but there is going to be alot of metal that needs to be heated and difficult angles to negotiate.

But any of TIG, MIG or ARC would be fine. Choose the method that the person doing the job has the most confidence in.

- David.

Edit: and that is a small motor, if we where talking about a turboed SB then we are walking closer to the edge.

i personally wouldnt weld anything with an arc but thats me. For this i would mig it. I use a tig every day but i wouldnt use one for this, unless you know what your doing, good at doing it and have a good enough tig to do it otherwise its a waste of time and you will do more damage than good