 This can't be good., rocker movement - help diagnosing before tearing |
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| iankarr |
 Mar 26 2017, 09:25 AM
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#1
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The wrencher formerly known as Cuddy_K  Group: Members Posts: 2,556 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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Hi Guys,
So...my (new to me) 74 2.0 FI was idling great and running pretty well, except after warm it would occasionally experience a loss of power at about 3000K. Last weekend I took the dizzy out to clean and lube the plates. Also installed a pertronix and flame thrower coil. Started it up and ran like crap and uber rich. Then realized I forgot to connect the MPS hose. duh. Did that and it started up ok. It was late, so I left the car till this weekend to get the timing dialed in. OK, so I start it today and hear this tapping racket and the engine feels like it's only running on 3 cylinders. Pulled plug wires one at a time, and it seems all are contributing. Pulled the valve covers to see if that's where the racket was coming from and figured it was a good idea to make sure everything was properly adjusted anyway. Nothing LOOKS weird, but if I pull backwards on the #2 intake rocker, it will move about 1/4" towards me. Let it go and it returns back to contacting the valve stem. I know it isn't normal, but before I tear into things, I thought I'd check with the brain trust.Bent rod? Beginnings of dropped valve? From what I can tell, the POs didn't drive this car much, so I wouldn't be surprised that all this new activity is exposing weaknesses.... Thanks! |
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| iankarr |
Mar 26 2017, 07:03 PM
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#2
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,556 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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Thanks guys. Doing some research on conversion to solid now...
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Posts in this topic
cuddyk This can't be good. Mar 26 2017, 09:25 AM
Tbrown4x4 Which direction are you pulling it? Are you slidin... Mar 26 2017, 09:29 AM cuddyk Away from the valve, towards me. None of the other... Mar 26 2017, 09:33 AM Krieger A long time ago I had a car with 2.0 heads that ov... Mar 26 2017, 09:47 AM r_towle Have you considered you may have hydraulic lifters... Mar 26 2017, 10:53 AM
stugray
....some of them you cannot totally remove the tu... Mar 26 2017, 11:01 AM r_towle Btw, that head is way to clean.... Mar 26 2017, 10:57 AM Tbrown4x4 I was thinking hydraulic lifters too. There is a w... Mar 26 2017, 10:57 AM Mikey914 Well if you have 1/4" i would suspect that yo... Mar 26 2017, 11:09 AM r_towle
Well if you have 1/4" i would suspect that y... Mar 26 2017, 11:22 AM cuddyk Thanks guys.
Unfortunately this car came with no ... Mar 26 2017, 11:28 AM injunmort mine made a similar intermittent racket. the engin... Mar 26 2017, 11:42 AM Mark Henry Springing back like that is odd and I'm wonder... Mar 26 2017, 12:16 PM rgalla9146 There is no spring in a 2.0 lifter.
As has been ... Mar 26 2017, 12:16 PM zipedadoo What if the cam lobe was gone for that valve? Prob... Mar 26 2017, 12:40 PM cuddyk Engine code stamp looks normal. And it appears the... Mar 26 2017, 12:54 PM Tbrown4x4 You're this deep. I would pull the tube and fi... Mar 26 2017, 01:08 PM cuddyk
You're this deep. I would pull the tube and f... Mar 26 2017, 01:21 PM Tbrown4x4 I would switch to solid myself. I don't have a... Mar 26 2017, 01:32 PM rgalla9146 Maybe it's just that one ?.....best to check .... Mar 26 2017, 02:28 PM cuddyk Just checked the #2 exhaust lifter with the borosc... Mar 26 2017, 03:46 PM rgalla9146
Just checked the #2 exhaust lifter with the boros... Mar 26 2017, 05:04 PM r_towle It could be fine if you let the oil get warm and f... Mar 26 2017, 05:16 PM cgnj CrMO for sure, Cam any ones guess. I"d go to ... Mar 26 2017, 05:25 PM Mark Henry You absolutely have to change the cam to go to sol... Mar 27 2017, 12:03 AM Tbrown4x4 I was more worried about new lifters on an old cam... Mar 27 2017, 04:36 AM cuddyk Much appreciated, World.
If this is a cam change ... Mar 27 2017, 07:27 AM cuddyk Just a quick update...
Turns out the rough runnin... Apr 1 2017, 11:22 AM |
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