very likely timing is retarded. did you check the pump plunger lift also after fitting the belt?
jc
After replacing the timing belt and cylinder head with a complete new item, I have now been suprised to be dealt with a lack of top end power and considerably higher egt readings
Timing belt was replaced with the IP locked using 9mm pin, crank at TDC and cam sprocket in alignment with webbing. Double checked this after noticing egts & power loss.
New cyl head is a complete standard replacement with new valves, springs etc. Correct thickness gasket used and valve clearances adjusted.
Old injectors cleaned by LR specialist and reinstalled.
Intercooler & pipes, turbo wastegate hose all ok.
IP has not been tweaked whilst I have had the car, not blowing excessive smoke only usual puff on start up and at full throttle.
Dissapointed with the end result being a considerable loss of power and high egts 500+ at 100kph usually about 320-340 on the same stretch of road
If any one has any ideas on the possible cause(s) that would be ace!
very likely timing is retarded. did you check the pump plunger lift also after fitting the belt?
jc
Thanks JC
I dont have the know how to check the pump plunger lift measurement or a dial guage so for fear of making matters worse I might leave that one for my mechanic
Being an auto has the drive plate ever been replaced?
I had problems with the notch in the drive plate not lining up after the drive plate was replaced. The mechanic still used the notch to set the belt timing up but I noticed a lack of power afterwards (drive plate and belt were done at same time). I pulled the cover off and noticed the woodruff key on crank was at 5 past rather than bang on 12'oclock. I lined the key up with the mark on the casing and all was well afterwards. Either they fitted the wrong drive plate or never installed it properly, hence I can't use the locking pin in the drive plate/flywheel method to find TDC any longer.
Cheers
Mark
Ah thanks Mark, I was wondering why I could not get the pin and notch to line up! It's possible the driveplate was replaced by a previous owner i guess, so I used the woodruff key & casing mark for TDC also.
Spoke with a LR specialist today, I was told that if i locked the IP and lined up crank & cam that there should not be any IP timing problems - which is what i would assume, however I have double checked that I had carried out the correct procedure as after the first road test I naturally thought I had made a mistake but after carrying out the procedure a second time (IP was locked with 9.5mm pin, very tight fit, cam & crank lined up exactly with casing markings after fitting & tensioning, tightened IP pulley bolts, removed pin & rotated engine twice, all lined up) I'm 100% sure it all lines up exactly.
Booked the car in for thurs and will ask them to take a look at the IP plunger lift as JC mentioned, but am not filled with confidence as I also asked for a comp & leakdown test only to be told "not sure if we have those tools"..... can anyone recommend an excellent LR specialist in Melbourne's eastern suburbs?
Another thing to consider is the big nut on the IP pulley has been undone instead of the 3 outer bolts!
Have a read of this 300tdi injection timing wrong, yet somehow right? - Defender Forum - LR4x4 - The Land Rover Forum
Cheers
Mark
i hope not. that involves a lot of mucking about to rectify
jc
Ok, I have had the disco looked at by a LR mechanic - JC was spot on, timing was retarded at the cam. Apparently its not a good idea to replace the timing belt by only sighting the crank key & casing mark for TDCthe flywheel must be locked as well..I'll be sure to lock the flywheel next time.
However after a very noticable improvement in power it's still not pulling like before up hills under load and the EGT's are still on the high side.
Having a comp & leakdown tests done at a different LR specialist on thursday and will check the turbo shaft for any "in/out" play, if no conclusions are drawn from there on I am all out of ideas - should have followed in my Father's footsteps and become an automotive engineer![]()
my egts are higher than normal not massively but i have noticed when going up hills im hitting the 6's a lot more.
I have a split flex pipe on the exhaust that needs changing I asked a friend if this being orken could cause the high egts and he seems to think it could be playing a part..
I dont know why
anyway I havent fixed mine yet to be able to see whether it was or not but maybe just have looksee
Our Land Rover does not leak oil! it just marks its territory.......
valve clearances play a big part in a tdi with regards egt and performance, they need to be checked etc every 10,000km.
jc
The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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