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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Tue, Aug-15-2017, 12:33:22 PM   #11
Obioban
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Default Re: Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade?

I'd love to see someone measure the difference in output between the VAC modified pump and the stock pump. Based on VAC's other products, I wouldn't be surprised if it was less than stock.
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Old Fri, Aug-18-2017, 03:46:52 PM   #12
vmbray
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Default Re: Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade?

I have stock internals, 160k, s54 pump, pan. Depending on the course I will have lots of ticking at autocross. One thing that helps is let the engine idle between runs. If you shut it down, it seems that the valves that are open mash the lifters and force the oil out. I have a lot less issue with this if I let it idle. Opening the hood isn't a bad idea to help with heat soak. And yes run a solid quart high.

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Old Fri, Aug-18-2017, 05:19:14 PM   #13
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Default Re: Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade?

I do appreciate the comments about running a quart over, and ticking being common with these cars, especially from someone running an S 54 pump and pan. However, what I'm experiencing is not just ticking, but actual physical collapsing of the lifter, such that when I remove it, is collapsed a 10th of an inch or so and does not extend.

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Old Tue, Aug-22-2017, 02:53:27 AM   #14
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Default Re: Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade?

So, to update this thread. I pulled the cams , trays and lifters. Two are collapsed on the intake side this time. But now, a new finding. The thrust surface at the front part of the cam has been grinding against the front cap of the intake cam tray. These are both wearing surfaces, and are totally wrecked. Now there is about 1/8 inch or more of cam end play. I don't see an oiling problem on the cam bearing journals. Just faint wear. Either the cam had a bad thrust surface, or somehow the vanos was ramming the camshaft back. Is that even possible?
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Old Tue, Aug-22-2017, 06:01:08 AM   #15
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Default Re: Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade?

All I hear is don’t buy Riot cams.
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Discussing Collapsed lifters- bad cam trays? Or VAC S54 oil pan upgrade? in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)