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ECM-644A VVT Stuff...

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
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1997 - 2004 C70
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Maestrours
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Re: ECM-644A VVT Stuff...

Post by Maestrours »

wizechatmgr wrote: ↑09 Jan 2023, 18:34
If it's not throwing a code, I'd leave it be. Enjoy the victory =)
Hi,

Yeah maybe... The pulley i'm talking about is the intake pulley, there is no VVT, neither solenoid. I guess even if it's unaligned it will not throw a code?
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rrres
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Post by rrres »

Maestrours wrote: ↑11 Jan 2023, 01:36
wizechatmgr wrote: ↑09 Jan 2023, 18:34
If it's not throwing a code, I'd leave it be. Enjoy the victory =)
Hi,

Yeah maybe... The pulley i'm talking about is the intake pulley, there is no VVT, neither solenoid. I guess even if it's unaligned it will not throw a code?
Correct me if I'm wrong...Will probably not throw a code but if the intake cam mark is not aligned with the other corresponding marks, then, in the future, if someone wants to change just the timing belt, they have to be aware to make the intake cam mark unaligned....or install a locking tool, which adds a little bit to the labor.
It's blowby
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wizechatmgr
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Post by wizechatmgr »

If it's off by a tooth on the intake cam, it may not run as well as it could...
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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Maestrours
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Post by Maestrours »

rrres wrote: ↑11 Jan 2023, 09:06 Correct me if I'm wrong...Will probably not throw a code but if the intake cam mark is not aligned with the other corresponding marks, then, in the future, if someone wants to change just the timing belt, they have to be aware to make the intake cam mark unaligned....or install a locking tool, which adds a little bit to the labor.
Nah you're right. I have put New marks on cover and pulleys for that.
wizechatmgr wrote: ↑14 Jan 2023, 20:42
If it's off by a tooth on the intake cam, it may not run as well as it could...
That's the question.
I don't know if it is off or no: when locking tool was on the engine I had this marks, si I guess even if there is no vvt on intake, the pulley have been unaligned into slotted holes (it has exactly one tooth of setting).
If the cam was locked, it can't be unaligned?
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Post by wizechatmgr »

When the cams locking tool was on the intake valve should have been setup to be zeroed I believe. It may just be off by a tooth. I believe the sensor is on the exhaust cam.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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Post by wizechatmgr »

The actual pulleys/sprockets aren't keyed, they're kept in by the pressure exerted on the center bolt of them. Typically the locking tool goes on, then those are zeroed.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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