Throttle issue.
- Thread starter Thhmarc
- Start date
Re: Throttle issue.
The tentioner is in the middle of the chains and will expand and contract at given times depending on what the vanos is doing.If the vanos is retarding the cams the chains will become loose and rattle against the bottom of the casing.The tentioner expands in the middle to expand the chains from scraping.
The tentioner is in the middle of the chains and will expand and contract at given times depending on what the vanos is doing.If the vanos is retarding the cams the chains will become loose and rattle against the bottom of the casing.The tentioner expands in the middle to expand the chains from scraping.
Re: Throttle issue.
I have this sound as well when I accelerate. I have asked around but never seem to get an answer for it . One of the workshop even mentioned something along the line of hydraulic lifters . Anyway like you mentioned from the other forums it seem to have to do with the vanos.
Thhmarc;1059965 said:
I have this sound as well when I accelerate. I have asked around but never seem to get an answer for it . One of the workshop even mentioned something along the line of hydraulic lifters . Anyway like you mentioned from the other forums it seem to have to do with the vanos.
Re: Throttle issue.
In addition to the rattling sound coming from the upper valve train assembly, you may experience CEL, engine codes, and I've heard from one source that your gas mileage can start to decrease. The source who told me this said their gas mileage went all the way to 7mpg before it failed. You may also experience white smoke from the tail pipes as the VANOS system continues to break down.
Solenoids: It is possible that you have a bad Exhaust Solenoids. There aren't as many cases of people experiencing the knocking, you would typically have a CEL light, but there are some instances in the N54 that the knocking occurred. The replacement of this part is much cheaper than replacing the entire VANOS system.
In addition to the rattling sound coming from the upper valve train assembly, you may experience CEL, engine codes, and I've heard from one source that your gas mileage can start to decrease. The source who told me this said their gas mileage went all the way to 7mpg before it failed. You may also experience white smoke from the tail pipes as the VANOS system continues to break down.
Solenoids: It is possible that you have a bad Exhaust Solenoids. There aren't as many cases of people experiencing the knocking, you would typically have a CEL light, but there are some instances in the N54 that the knocking occurred. The replacement of this part is much cheaper than replacing the entire VANOS system.
Re: Throttle issue.
the ws uncle mentioned there a need for special tools to work on the "Banos" and he have the tools....seems like he knows what he is doing
BMW's solution when VANOS units fail is to remove the entire VANOS unit and replace it with a new one). VANOS repair may require special tools (cooling fan clutch wrenches, etc.) that can be rented or purchased from a variety of vendors.
the ws uncle mentioned there a need for special tools to work on the "Banos" and he have the tools....seems like he knows what he is doing
BMW's solution when VANOS units fail is to remove the entire VANOS unit and replace it with a new one). VANOS repair may require special tools (cooling fan clutch wrenches, etc.) that can be rented or purchased from a variety of vendors.
Red_Bean_Bun
Well-Known Member
Re: Throttle issue.
You never gun the ride so error never show up ?
If your mech going to take the intake solenoid out ....... Maybe ask him to take out the exhaust one along the way to check ?
Hope your problem will be addressed in the next couple of days ........
You never gun the ride so error never show up ?
If your mech going to take the intake solenoid out ....... Maybe ask him to take out the exhaust one along the way to check ?
Hope your problem will be addressed in the next couple of days ........
Thhmarc;1059946 said:
Re: Throttle issue.
Yes I have loss of power . Again I m on powerbox for n52 so maybe its the way it drives with the PB on . I m talking bout almost stopping then trying to accelerate again ,it feels like there is nothing coming out for that 1 second.
The FC I stopped monitoring long time ago , bcoz it was crap to begin with . Mine is probably bout 8 ? Maybe less .
Thhmarc;1059982 said:
Yes I have loss of power . Again I m on powerbox for n52 so maybe its the way it drives with the PB on . I m talking bout almost stopping then trying to accelerate again ,it feels like there is nothing coming out for that 1 second.
The FC I stopped monitoring long time ago , bcoz it was crap to begin with . Mine is probably bout 8 ? Maybe less .
Re: Throttle issue.
i am getting more convinced by the workshop uncle words about that timing adjustment. I think the timing he mentioned should be the camshaft timing. I have check that my head gasket was repaired before and thus from the article below, maybe the the timing was not adjusted proper.
If you replace your head gasket, you will need to retime your camshafts and re-install the Vanos unit. For the purpose of instruction here, we'll assume that you have your cylinder head installed on the engine block, the crankshaft is locked at Top Dead Center (TDC), and your two camshafts are locked using the BMW camshaft locking tool. This article will guide you through the process of retiming your camshafts, and re-installing the Vanos variable camshaft timing unit.
i am getting more convinced by the workshop uncle words about that timing adjustment. I think the timing he mentioned should be the camshaft timing. I have check that my head gasket was repaired before and thus from the article below, maybe the the timing was not adjusted proper.
If you replace your head gasket, you will need to retime your camshafts and re-install the Vanos unit. For the purpose of instruction here, we'll assume that you have your cylinder head installed on the engine block, the crankshaft is locked at Top Dead Center (TDC), and your two camshafts are locked using the BMW camshaft locking tool. This article will guide you through the process of retiming your camshafts, and re-installing the Vanos variable camshaft timing unit.
Red_Bean_Bun
Well-Known Member
Re: Throttle issue.
Only if the WS need to take the vanos out then the setting tool is needed so that the camshaft timing isn't lost. Head gasket replacement will affect not timing. Have those solenoids checked out first ......
Only if the WS need to take the vanos out then the setting tool is needed so that the camshaft timing isn't lost. Head gasket replacement will affect not timing. Have those solenoids checked out first ......
Thhmarc;1060005 said:
canuck78
Well-Known Member
Re: Throttle issue.
Does it sound like the diesel taxi's clatter when they accelerate?
BMW 4 cyl has the same sound, as was in mine when i first got the car.
Esp during startup is that engine oil can't reach the hydraulic lifters which is at the top of the engine.
So the solution to try for this maybe in cheapest to most ex cost i.e.:
1) buy hydraulic lifter oils to add in (1 can of liquidmoly from autobacs around $20+)
2) try a thicker engine oil e.g. 40w
3) desludge your engine (if you engine is sludged up, mostly 05-06 cars by now probably could be)
Does it sound like the diesel taxi's clatter when they accelerate?
BMW 4 cyl has the same sound, as was in mine when i first got the car.
Esp during startup is that engine oil can't reach the hydraulic lifters which is at the top of the engine.
So the solution to try for this maybe in cheapest to most ex cost i.e.:
1) buy hydraulic lifter oils to add in (1 can of liquidmoly from autobacs around $20+)
2) try a thicker engine oil e.g. 40w
3) desludge your engine (if you engine is sludged up, mostly 05-06 cars by now probably could be)
nhc;1059981 said:
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