100 Series T/D radiator fan problem

TPG,

Yep mines done it but not pierced the core.apparently you fit a 78/79 series fan or as some one suggested the other day cut a piece of 20mm wire mesh the size of the core and put it behind the cowl.it supposedly works,try a search.cheers Paul

I think its got something to do with the flex of the blades. 100 series is more flexy and gets sucked into the radiator. Others I believe have less flex solving the issue.

I'll stand corrected but I'm pretty sure that's it.

The 80 series will flex as well, trust me.

There is one solution fit some small mesh max size 20mm x 20mm between the cowling and the radiator.

Parks have done this and so have I I will do my new car soon and post some before and after photo's.

Cheers Steve.

Our 78 series has marks on the radiator after a deep water crossing - the mesh sounds like way to the go - next trip to Bunnings!!!

Stevesub

Thanks all for the quick responses. sounds like the mesh is the way to go. I will have a look at the best way to mount to the radiator, and still fit the shroud. I wonder if it will need to be spaced back from the radiator core? Hopefully get time on the weekend and report back. Cheers

There have been several discussions on this and other forums about the problem, I myself have had it happen and several large marks in the radiator and three blades broken. This happened in a mud hole not a water crossing and accept that stiffer blades will help as will a layer eg mesh between the radiator and fan, but this does not address the problem. After having spoken with several others that have been affected I believe that one of the main common contributing factors is the large plastic inspection plug in the front bash plate missing. I have now replaced my bash plate with one that covers the area between the bottom of the radiator and the cross member and does not have a hole where the original plastic bung goes, this has now eliminated the space where water could have entered originally and have had no further problems in water crossings. I guess you will do your own studies and make up your mind as which way to go, I originally was also going to use some form of barrier between the fan and radiator but decided against this as the risk of vibrations causing punctures to the radiator or breaking blades away from access to spare parts was to risky and would also reduce the efficiency of the radiator, I believe that I have read somewhere that Toyota advises not to use a mesh in front of the radiator as it could cause other problems.
Just my 2c worth and I hope that the others that have used the mesh have also cured the problem with that fix.

Did a trip with mate up Cape last year and his 75 broke two fan blades on water crossings (two seperate occasions) and he managed to get a replacement fan at Siessa. I did the same crossings in my 80 series petrol and never had any problems.
My theory is that I go into the water slow on idle and dont accelerate until the fan blade touches the water by which time the water has stopped the blade rotating. I have done many top of the bonnet water crossings this way. Works for me.

Rod

A bloke told me once that he fixed this concern by drilling a small 1/8" hole in the end of one fan blade and simply tied the fan in place with an occy strap before deep crossings.
Did not see it in action but he said he used it several times on Cape York trip and no problems.
Was planning to do same for Cape trip this year.
Cheers

I know a guy who has holed two rads in his hzj105. I took him an 80 series 1hz fan and coupling,. and the 80 one has a shorter shank, therefore moving the fan away from the rad by half an inch...he didnt give it back :)
Andrew