Pushrod, lifter, valve, etc. PROBLEM., Daily Driver emergency! |
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Pushrod, lifter, valve, etc. PROBLEM., Daily Driver emergency! |
ripper911 |
May 9 2016, 06:18 PM
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#1
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corde pulsum tangite Group: Members Posts: 2,920 Joined: 25-April 10 From: Powder Springs, GA Member No.: 11,654 Region Association: South East States |
I went to perform a valve adjustment and the exhaust valve on #4 wouldn't tighten. I got frustrated and called in a travelling 914 mechanic.
The screw was binding in the rocker, but he got it tightened enough to try to adjust. It wasn't moving while turning the engine. I was left with instructions to pull the rockers and check the pushrod as it might be bent. I pulled the pushed out, and it looks pretty straight to me, so he said to pull the lifter out with a magnet and inspect it. This is where I'm stuck. I was having trouble with my extendable magnet extending and collapsing while trying to pull the lifter out. I bought some new magnets, but I'm still not having any luck. The mechanic said that it takes some finessing to get out. Is there a trick to it? What makes it worse is that I have been using one of my boss's cars in the meantime, but they're selling the business (closing on sale Wednesday) so I need to give the car back. I'll get the mechanic back over here soon, but going on my knowledge of the car, if the pushrod isn't bent, and if the lifter turns out to be OK, then it won't be something I can fix over the weekend. Help... (IMG:style_emoticons/default/unsure.gif) |
r_towle |
May 9 2016, 09:52 PM
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#2
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Put it back together and don't worry about the camshaft.
That motor will outlast the body. (IMG:style_emoticons/default/smile.gif) I,am,not trying to be a jerk, just think about the problem. IF the camshaft was wearing out, you would have a lot more adjustment in that cylinder. So pulling the lifter won't help, it's just a time suck. If the valve seat fell out, or got cockeyed, that would again give you a lot more adjustment. Maybe, just maybe, the rocker arm was fubar, you needed a new adjuster, and maybe that is it. Rich |
ripper911 |
May 10 2016, 05:38 AM
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#3
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corde pulsum tangite Group: Members Posts: 2,920 Joined: 25-April 10 From: Powder Springs, GA Member No.: 11,654 Region Association: South East States |
IF the camshaft was wearing out, you would have a lot more adjustment in that cylinder. If the valve seat fell out, or got cockeyed, that would again give you a lot more adjustment. Rich It was very loose. There was probably 1/8" or more of free play between the adjustment screw and the rod. It's possible that it was just the rocker or screw, but the mechanic who knows 914s supposedly got it tightened up enough and adjusted. |
Jake Raby |
May 10 2016, 08:11 AM
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#4
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
IF the camshaft was wearing out, you would have a lot more adjustment in that cylinder. If the valve seat fell out, or got cockeyed, that would again give you a lot more adjustment. Rich It was very loose. There was probably 1/8" or more of free play between the adjustment screw and the rod. It's possible that it was just the rocker or screw, but the mechanic who knows 914s supposedly got it tightened up enough and adjusted. With that much clearance, you'll have an underlying condition for sure. Check the sump plate for ferromagnetic debris. |
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