Will Posted December 6, 2022 Share Posted December 6, 2022 Mack Trident 1998 model 470 etech, turbo touching steering column when accelerating hard under load. Engine and gearbox mounts look ok. anyone with any ideas would be great. Cheers Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/ Share on other sites More sharing options...
Joey Mack Posted December 6, 2022 Share Posted December 6, 2022 I'm guessing it's right hand drive. I'd love to see a picture. How long has it been touching and under what conditions does it touch? Ie: driving style, and terrain? Does it touch when off road? Can you rotate the compressor volute out of the way and make a new CAC pipe? Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517523 Share on other sites More sharing options...
fjh Posted December 6, 2022 Share Posted December 6, 2022 On 12/6/2022 at 5:20 AM, Will said: Mack Trident 1998 model 470 etech, turbo touching steering column when accelerating hard under load. Engine and gearbox mounts look ok. anyone with any ideas would be great. Cheers Expand My guess is the rear engine mounts are toast! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517524 Share on other sites More sharing options...
Joey Mack Posted December 6, 2022 Share Posted December 6, 2022 That was my first thought too FJH.. But he says they are good... Maybe a second look is needed.. Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517526 Share on other sites More sharing options...
fjh Posted December 6, 2022 Share Posted December 6, 2022 On 12/6/2022 at 2:28 PM, Joey Mack said: That was my first thought too FJH.. But he says they are good... Maybe a second look is needed.. Expand Depends on the style! I assume its the Big single as used on the MH and later RW here! The bolts on the left hand can come loose and sometimes break ! Mostly behind a V8 ! All bets are off if its that new Volvo Mount they are garbage to start with! Not sur if the Auz trucks are built the same! Not sure the Volvo Take over was after 2002 so likley the affore mentioned! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517528 Share on other sites More sharing options...
Will Posted December 6, 2022 Author Share Posted December 6, 2022 2 mounts on the gearbox are good, bolts are tight. Mount on the front of engine near flywheel are tight but still hitting turbo Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517582 Share on other sites More sharing options...
67RModel Posted December 7, 2022 Share Posted December 7, 2022 What about your cab mounts? 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517594 Share on other sites More sharing options...
Adkat Posted December 7, 2022 Share Posted December 7, 2022 How much clearance between turbo and column when it's sitting? Have you jacked up gearbox to check the mounts? They can look good, but have seperated the rubber from the steel plates. By memory the LH one is hard to see properly. Good call 67R, worth a look, cab mounts are usually neglected when servicing Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517595 Share on other sites More sharing options...
Will Posted December 7, 2022 Author Share Posted December 7, 2022 Put new cab mounts on, still does it. About an inch clearance Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517622 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 Do you have 2 steering u joints at the steering box, like an RD? Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517628 Share on other sites More sharing options...
Will Posted December 7, 2022 Author Share Posted December 7, 2022 No only 1 uni joint on firewall and one uni joint on the steering box Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517633 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 Ok.. I'm grabbing at straws.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517634 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 11:40 AM, Joey Mack said: Ok.. I'm grabbing at straws.. Expand agreed only seen pictures of a trident! the year in my mind indicates its a real Mack no Volvo parts ! Is the rear engine mount a single or double insulator!??? Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517645 Share on other sites More sharing options...
67RModel Posted December 7, 2022 Share Posted December 7, 2022 OK. here are some questions that may help: 1. Is this something that just happened? Like you opened the hood one day and they were touching? Or have you noticed the clearance between the two getting smaller over time. 2. How much is the clearance on a Trident that doesn't have this problem? 3 inches or 3mm? 3. Have you done any crazy offroading or heavily loaded offroading? Maybe your frame is twisted? If engine, trans, and cab mounts are all new/good what else could it be? 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517656 Share on other sites More sharing options...
fjh Posted December 7, 2022 Share Posted December 7, 2022 On 12/7/2022 at 4:23 PM, 67RModel said: OK. here are some questions that may help: 1. Is this something that just happened? Like you opened the hood one day and they were touching? Or have you noticed the clearance between the two getting smaller over time. 2. How much is the clearance on a Trident that doesn't have this problem? 3 inches or 3mm? 3. Have you done any crazy offroading or heavily loaded offroading? Maybe your frame is twisted? If engine, trans, and cab mounts are all new/good what else could it be? Expand Good Call 67! Quote Link to comment https://www.bigmacktrucks.com/topic/70829-engine/#findComment-517659 Share on other sites More sharing options...
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