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by vtl
30 Sep 2024, 05:27
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Re: Pressure wash the valve cover?

I would refrain from using a high PSI pressure washer, like 3000. 1700 PSI didn't do any damage. But it won't do any good without hot tanking. Weld your own hot tank! I got 4 or 5 pieces of 2"x1" zinc plated steel sheets from Home Depot and stick welded a tank. MIG would be much easier. Al...
by vtl
30 Sep 2024, 05:34
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Re: 02 XC70 - The repairs have started

Nice work, however why is this not done or is it like the transmission fluid :roll: suppose to be in spec the life of the car? Does VIDA give a mileage or time that this needs to be checked? . Solid tappets are good for the life of car. In Volvo's opinion, you should be buying a new Volvo shortly a...
by vtl
30 Sep 2024, 08:37
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Re: How hard is it to retro-fit headlight wipers? 2007 XC70

There is also as you mention parts that like to break when owners don't put winter wash fluid in. I leave winter fluid in year around as we do so little mileage we don't use a lot of fluid. Our P2 started to use a lot of fluid at one point and on removing the front bumper the valve on the RHS looke...
by vtl
01 Oct 2024, 10:53
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Re: Heater core replacement - Brands? - 06 XC70

Many thanks, but it is for the 06 XC70 that is my son's, and not the S60 I worked on on the weekend. But they should be the same. I am in a monitoring mode on this just now. Not sure if or what is leaking if anything. I had been planning a coolant flush in the fall here, so to swap it out, this wou...
by vtl
07 Oct 2024, 05:01
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Re: Should I bother cleaning valves? If so, with what? xc70 2004

Doesn't Simple Green eat Aluminum? IIRC, it says "no" on a regular Simple Green jug, but in my experience it does. All my engine aluminum parts showed some heavy oxidation within a few weeks/months, even that I powerwashed everything well. It also ate a few beer cans I used for valves cle...
by vtl
07 Oct 2024, 05:37
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Re: Lapping (sanding) head down, within spec but still dirty. Keep going?

You are doing it wrong. First off, this is a Swedish car, right? So you MUST use IKEA kitchen table! ;) Also a polished 3/8" or thicker glass on top of it, and let it sit for a few days to relax and straighten. My setup was under 0.05 mm (0.002") flat in the work area. 1.jpg Grit 320 sandp...
by vtl
11 Oct 2024, 05:28
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Re: Lapping (sanding) head down, within spec but still dirty. Keep going?

volvolugnut wrote: 09 Oct 2024, 14:38 If you remove too much thickness from the head, you can increase the compression ratio too much. This can cause ping and the need for higher octane fuel.
This is a turbo engine, it already has too much compression :) ECM knows how to detect pings and advance ignition/ move VVT.
by vtl
22 Oct 2024, 12:43
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Re: Vida CEM swapping

Almost any digital electric circuit needs a common ground between its parts. Try it with door open, but without key. With key in position 0, 1 or 2. Remove CEM_PN_AUTODETECT: https://github.com/vtl/volvo-cem-cracker/blob/master/volvo-cem-cracker.ino#L14 (in that case you may need to tweak LS/HS spe...
by vtl
22 Oct 2024, 19:20
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Re: Vida CEM swapping

nikemen wrote: 22 Oct 2024, 18:08 Because of what it says in the code:

Code: Select all

comment out for P2 CEM-L on the bench w/o DIM
I'm sorry, I'm trying to understand.
The cracker was started as P2 2004+ (CEM-L) project.
by vtl
23 Oct 2024, 09:52
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Re: Vida CEM swapping

Thanks for the reply. Yes, I do swap the large and small sequence numbers, but if I had made a mistake somewhere, the block would not have been diagnosed and the configuration would have been incorrect in CEMtool. For you P/N the shuffle order is nr.2 in array: https://github.com/vtl/volvo-cem-crac...