 | Home > Maintenance & Modifications > Turner Engineering Cylinder Head Question |
 
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| donmacn Member Since: 06 Nov 2017 Location: Nth Scotland Posts: 1848  
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I have, about a year ago now. Unfortunately I did so many other things at the same time that it would be impossible for me to comment on the impact of any single thing.
In a way it might have been good to do them all one at a time, but that just wasn't feasible. The relevant things that were done were; Turner gas-flowed head; Fuel pump professionally refurbed/tweaked; VNT fitted; Full width Allard intercooler fitted; Griffin exhaust. Oh, and a taller 5th gear in a refurbed gearbox As you can appreciate, all of these things would have an impact on 'performance' (sic - it's still a 300Tdi) and fuel consumption. The last thing to go on was the Turbo, on the basis of BAS advice to let the rebuilt engine run for 500 miles before doing a couple of oil changes and then fit it. So before the turbo went on, the car performed much better. I suspect the biggest single change/impact was the fuel pump. I was told that mine was ca. 15% below standard when it was checked over prior to the tweaks/refurb. Now, the car will sit very comfortably at 60, get easily up to 70 and beyond if I can be bothered. The biggest change has been the low down grunt, making joining and keeping up with traffic a lot easier. So, on the open road I drive much as I used to; around town maybe accelerate a bit more up to your 30/40/50 or whatever. Having said all of that... in it's original state, I reckon I was getting ca. 29/30mpg. Now I'm getting ca 29/30mpg! I know it would be better on a long dual carriageway/motorway run - but there's not been much opportunity for that lately. The car pulls better and is 'smoother'. Sorry - not precisely what you were after.  Donald
1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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6th May 2021 6:31pm |
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| foxhound Member Since: 02 Mar 2013 Location: United Kingdom Posts: 363  
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thanks for that. i now find as well as head, i have to have a new timing case inner. whoever did a cam belt change a few years back didn't tighten bolts properly and there's lots of damage and wear and even an insert like a rivnut with a new thread in the timing case! 110 Defender 300tdi & Penman trailer with ally exped top and roof tent
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11th Jun 2021 4:01pm |
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| donmacn Member Since: 06 Nov 2017 Location: Nth Scotland Posts: 1848
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At the garage, when I was getting my engine swapped in or out, they were doing a snapped timing belt on another 300Tdi.
There was a lot of 'fluff' from the snapped belt, and some chewing of the pulleys. Digging about I found a loose and damaged bolt in the bottom of the case. It looked like the bolt had come loose, fallen in between the belt and the pulley - damaged the pulley and snapped the belt. Would the 'rivnut' actually be a proper helicoil? I had one of the spark plug threads professionally redone on one of my RR cylinder heads, and they've used a helicoil, or something very similar. Donald 1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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11th Jun 2021 5:50pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17467 
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Helicoil or more likely Timesert, I would think.
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11th Jun 2021 6:31pm |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2661 
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Very common to find helicoils or similar in Tdi timing cases - they’re prone to bolts seizing and snapping. There are two in mine. Done properly it’s perfectly acceptable.
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11th Jun 2021 8:00pm |
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| foxhound Member Since: 02 Mar 2013 Location: United Kingdom Posts: 363
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this one sadly won't allow proper torquing. so new timing case inner cover. 110 Defender 300tdi & Penman trailer with ally exped top and roof tent
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13th Jun 2021 8:44am |
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| foxhound Member Since: 02 Mar 2013 Location: United Kingdom Posts: 363
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I think it is, but it won't allow torquing up to the right number. 110 Defender 300tdi & Penman trailer with ally exped top and roof tent |
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13th Jun 2021 8:47am |
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