berg Posted March 23, 2017 Share Posted March 23, 2017 (edited) I lifted the bonnet today and happened to notice a chunk missing out of my fan cowling Looking on the inside there are also score marks from where it seems the fan has been making contact Fan is still hole with no signs of damage, no movement in the fan setup at all, even with the engine idling it seems to be running true and not wonky Any ideas what could have happened? I dont want to drive and risk a failure, but its strange how idling and a few revs on the spot there seems to be no issues, to damage this part it would have to move a fair amount Can see in the photo where its worn from the inside, outside of the hole looks a bit more severe as i have pulled some of the melted plastic off Edited March 23, 2017 by berg (see edit history) Quote Link to comment Share on other sites More sharing options...
Ric Posted March 23, 2017 Share Posted March 23, 2017 rad moving at speed? the none OEM mount you can see in the picture, does that push it more into the fan than OEM? Is the rad sat in the doughnuts properly and the clamps fully level and screwed down? Quote Link to comment Share on other sites More sharing options...
berg Posted March 23, 2017 Author Share Posted March 23, 2017 rad moving at speed? the none OEM mount you can see in the picture, does that push it more into the fan than OEM? Is the rad sat in the doughnuts properly and the clamps fully level and screwed down? The rad seems to be sat correctly at the bottom and both top brackets look fine also The bodged bracket on the cowling is just a temp fix until my carbon shroud is fitted, but the cowling is flush with the rad how it should be and doesnt move Id rather it mash this cowling than a carbon one though so maybe i could set my gopro up in the engine bay somehow and go for a drive Quote Link to comment Share on other sites More sharing options...
Ric Posted March 24, 2017 Share Posted March 24, 2017 Is it a NA fan and water pump? The NA Rad is smaller than the TT perhaps that means the fan sits closer to the cowling/rad on the NA? That could be rubbish but it makes sense in my head lol. Quote Link to comment Share on other sites More sharing options...
berg Posted March 24, 2017 Author Share Posted March 24, 2017 I know its all TT parts apart from im not sure on the fan as i bought it used from keron Although its been on the car 2 years Quote Link to comment Share on other sites More sharing options...
berg Posted March 25, 2017 Author Share Posted March 25, 2017 Ok have checked the car No movement at all in the radiator or the fan cowling I did think possibly engine mount but to hit where it has, the engine would need to move forward by the looks of it Ive been out today and the hole is now visibly worse if you compare the below image to the one above Also if i pull a fan blade forward by hand it lines up perfectly Any ideas?? Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 25, 2017 Share Posted March 25, 2017 Here's my theory: When revving high the fan will be sucking air in. This sucking force could be pulling the shroud slightly towards the fan and causing contact. Failing that, it could be a mix of engine movement and using an Na fan? I was under the assumption that the TT fan is slightly different. Have you checked that the 12mm nuts holding the fan to the pump are tight? Might also be worth checking if the 10mm nuts holding the fan to the viscous are tight/not damaged Quote Link to comment Share on other sites More sharing options...
evinX Posted March 25, 2017 Share Posted March 25, 2017 I find stones laying around my undertrsy sometimes. One could have been kicked in and flicked up by the fan propelling it through the shroud. Quote Link to comment Share on other sites More sharing options...
berg Posted March 25, 2017 Author Share Posted March 25, 2017 Here's my theory: When revving high the fan will be sucking air in. This sucking force could be pulling the shroud slightly towards the fan and causing contact. Failing that, it could be a mix of engine movement and using an Na fan? I was under the assumption that the TT fan is slightly different. Have you checked that the 12mm nuts holding the fan to the pump are tight? Might also be worth checking if the 10mm nuts holding the fan to the viscous are tight/not damaged Hmm i will look into this fan stuff then, the fan came from keron when i removed twin fans but never mentioned what car it was off, he knew i had a TT though Everything is tight yer, first thing i checked I find stones laying around my undertrsy sometimes. One could have been kicked in and flicked up by the fan propelling it through the shroud. No under trays on my car, plus its getting worth every drive Quote Link to comment Share on other sites More sharing options...
berg Posted March 25, 2017 Author Share Posted March 25, 2017 Ok from what ive read an n/a fan wont work on a TT as the blades hit the water neck so i cant have been given an n/a fan Im starting to think its maybe happening under braking due to a worn engine/gearbox mount Quote Link to comment Share on other sites More sharing options...
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