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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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D5252T Pump TimingViews : 5082 Replies : 18Users Viewing This Thread : |
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Sep 10th, 2011, 17:44 | #11 |
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i dont know which version of air mass meter you have , the older bulky alluminium flap type are very reliable, the later conventional air mass meter type can gradualy change its values over time causing this lack of torque under 2000 rpm .. Unlike pertol versions the diesel system has no feedback from a lambda probe to compensate for this .
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Sep 10th, 2011, 17:46 | #12 | |
Just one more thing...
Last Online: Jul 10th, 2020 14:44
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Location: North Wales
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Quote:
Ah very interesting, AFAIK the D5252T in the 850 TDI came with a FLAP type vane airflow meter whereas the D5252T in the V70 TDI came with a proper electronic MAF. Am i wrong. Also how can i tell which kind is fitted to my car ??
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'98 V40 2.0T B4204T - died... '96 855 2.5 TDI D5252T - 255,000 miles "Diesel without turbo is like a woman without boobs... sure you can drive it, but there's always something missing." |
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Sep 10th, 2011, 17:52 | #13 | |
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Quote:
then you have the bulky mechanical flap type on the air filter housing , so it wouldnt apply with yours . Although in 222000 miles it may be subject to some wear ! However my old 360 GLT had done 250000 miles on its original air mass meter of the same type .
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Sep 10th, 2011, 18:48 | #14 | |
Owner Volvovehiclesclub
Last Online: Apr 4th, 2014 12:18
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Location: Choosing which Volvo to go out in Today !!! lex parsimoniae
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Excuse me May I interseed here <<<< That "Polite" enough fer ya ??
Quote:
YOU stated that you do NOT need to check the Pump Timing that statement is based on the fact that (as you say) you Deal with this sort of thing everyday. The guys on Here DO NOT & therefore "Errors" could & DO occur.
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2000 C70 T5 Phase 1 240 Bhp in Saffron Orange ("SAPPHIRE") 2001 S80 2435cc Now with Andy Northface () 1994 960 CD 3.0 Estate ("The Purple Monster") VOC 25900 lex parsimoniae |
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Sep 10th, 2011, 19:04 | #15 |
Experienced Member
Last Online: Yesterday 23:26
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Yes thats much better thanks :-)
what i said was that pump timing wont need checking between belt changes because unlike an older mechanical diesel the electronics keep the timing adjusted perfectly between it's limits and if it cant, due to incorrect mechanical setting then the engine light will come on with a pump timing code . That goes for whoever sets the timing .. I shall move on away now ...
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My comments are only based on my opinions and vast experience . |
Sep 10th, 2011, 20:23 | #16 | |
Owner Volvovehiclesclub
Last Online: Apr 4th, 2014 12:18
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Location: Choosing which Volvo to go out in Today !!! lex parsimoniae
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Quote:
As has been said in this thread & from MY personal Experience ... NOT TRUE Both the OP & myself have had Pump Timing MANY degrees out & NO ENGINE MGMT LIGHT illuminated
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2000 C70 T5 Phase 1 240 Bhp in Saffron Orange ("SAPPHIRE") 2001 S80 2435cc Now with Andy Northface () 1994 960 CD 3.0 Estate ("The Purple Monster") VOC 25900 lex parsimoniae |
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Sep 11th, 2011, 04:52 | #17 | |
MaDMaN
Last Online: Nov 26th, 2022 18:47
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Location: Red Lodge
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Quote:
having inspected all the parts on my car i really am at quite a loss as to how the pump drive system is just going to move all by itself unless one of the parts is faulty..... for info purposes i could only get my timing to adjust around 5 degrees on the adjustment itself from one stop to another... any more than that & it was a case of moving teeth on the pulley. also the eml lit up quite quickly with the engine at +8 degrees, under 8 degrees it was taking about twenty minutes to light... i would hazard a guess at the real two problems behind the timing on these engines being out is firstly missed timing intervals of the belts to save a few quid & secondly incorrect adjustment in the first place....
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Sep 11th, 2011, 09:33 | #18 |
Owner Volvovehiclesclub
Last Online: Apr 4th, 2014 12:18
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In my personal case when I bought the S80 the previous owner had had the Belt changed by some baxck street "Spanner Jockey" who quite obviously DID NOT know wot the hell he was doing ..
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2000 C70 T5 Phase 1 240 Bhp in Saffron Orange ("SAPPHIRE") 2001 S80 2435cc Now with Andy Northface () 1994 960 CD 3.0 Estate ("The Purple Monster") VOC 25900 lex parsimoniae |
Sep 20th, 2011, 17:42 | #19 |
New Member
Last Online: Jan 2nd, 2014 09:32
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Location: Kuopio
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Hi, and sorry for language because I don´t know the exact words for certain parts, hope you understand (I´m from Finland).
I have 850 Tdi -96, 558 00km (which is something like 350 000 miles). I just took my car to local Bosch service for making the belt changing (cam belt, water pump and its belt and all the tightener rollers). The supply pump belt wasn´t changed since it was changed 12 000 miles ago. The motor was running very smoothly and well before service. Acceleration seemed to be normal, torque at low rpm was good. Never had had any problems with the engine. But now after service the engine is barely running. Mechanics said that they made all the adjustments to the cam and supply pump belts as always before, but with these factory settings the engine didn´t start at all. Now when they adjusted the supply pump much earlier (which gives the engine failure sign and prevents the electrical adjustment) the engine is running roughly, giving light smoke and lacking almost all of the power. The main mechanic said that there could be something wrong in the supply pump or in its electronics, and they wanted to disassemble it. The costs would been something like 200 to 1000 euros. Is it possible that normally running engine or supply pump can be broken in normal service, or is it just lack of skills in the adjustments? Or what else could have possibly gone wrong. They made adjustments to the cam and supply pump timing. Cheers |
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