 SOLVED: Yet another 1.7 "clattering" investigation NOW WITH VIDEO, What to look for? |
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| jrmdir |
 Aug 4 2021, 07:46 AM
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Member  Group: Members Posts: 224 Joined: 13-May 21 From: Central Ohio Member No.: 25,544 Region Association: Upper MidWest 
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Hello:
I'm still trying to sort numerous suspect items related to idle, mixture and hesitation in this recently acquired car but the "valve?" noise is driving me crazy while I work on various adjustments. I've adjusted the valves at least three times and believe there is no excess clearance but it seems to have gotten louder recently so I'm going back under to check things out - and this time plan to take the rocker arms off to check for new looseness or anything weird that would throw the feeler gauge measurement off. I've read about possible valve seat detachment - is there a way to check for this short of removing the heads? Anything else I should look for? What are the chances of rod knock instead of valvetrain? Notes: Mileage unknown. Car sat for 3+ years and of course the seller claimed "ran well when parked" LOL! Compression is good when warmed up, not so good in #1 and #3 when cold. No blue smoke. Hard to tell but the loudest noise seems to be #2 but that's just a guess. Thanks! Ron |
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| jrmdir |
Aug 12 2021, 11:34 AM
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Member Group: Members Posts: 224 Joined: 13-May 21 From: Central Ohio Member No.: 25,544 Region Association: Upper MidWest
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EDIT: Started a new thread with the videos below: http://www.914world.com/bbs2/index.php?showtopic=355079
Update as promised - and not any good news yet. In order to try to rule out misadjustment as the cause, I meticulously re-adjusted and double checked. And cranked it down just a bit to .005" just to be sure. When I next started the engine (1st video) I thought I'd hit pay dirt because it was as quiet as I've heard it. Yeah! BUT, within a few minutes the clatter came back with a vengeance - videos 2 and 3. I focused on cylinder 2 as that seems to be the loudest corner but it's hard to tell. FWIW, I unplugged that injector but did not notice any real change. Also when cranking without starting there doesn't seem to be any mechanical noise. Any help with diagnosis and next steps would be much appreciated. Ron Video 1: Cold Start https://youtu.be/5XBiv7zarvw Video 2: Warmed up & noisy https://www.youtube.com/watch?v=JFfPNDZkSnk Video 3: More noise https://www.youtube.com/watch?v=9fOrGUK6wZs |
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Posts in this topic
jrmdir SOLVED: Yet another 1.7 "clattering" investigation NOW WITH VIDEO Aug 4 2021, 07:46 AM
rjames As my chance you have hydraulic lifters? If so, th... Aug 4 2021, 09:19 AM Shivers Years back I purchased a set of P n C’ s that at... Aug 4 2021, 09:49 AM jrmdir Thanks rJames - I'll check. With the rocker ar... Aug 4 2021, 10:11 AM BeatNavy With the rocker arms off you need to pull the push... Aug 4 2021, 10:44 AM jrmdir Thanks for the helpful details BeatNavy. (The P n ... Aug 4 2021, 10:58 AM 914werke that shouldnt be necessasry, a hydro setup will us... Aug 4 2021, 11:19 AM JFG are you 100% sure it's the motor?
I asked bec... Aug 4 2021, 01:09 PM jrmdir Update.....
First, thanks for the suggestion JFG,... Aug 4 2021, 03:11 PM 914sgofast2 Make certain each pushrod is centered in the middl... Aug 13 2021, 08:56 PM
jrmdir Don't know how I missed this in my prior inves... Oct 31 2021, 08:24 AM |
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