Over-Rev and now a ticking sound
07-08-2019, 05:37 PM
#21
- Follow-up.
- Compression TEST @ ~ 8000 ft altitude and cold engine (CoSprings)
- 130/130/135/135
- From my understanding there's no utility in leakdown if compression test are consistent. Is this true?
- To my knowledge no liquid gaskets
- Engine has ~ 35K miles (it was supposed to be a weekend car, but i coundn't keep it off the track)
- I've used had the car since ~ 23K miles
- I tried the stethescope and coud'nt pinpoint anything previously, I think removving the manifold may be something easy to check
- to add, the buzzing you hear in the video sounds much harsher than when I shut the car down when it was hot, so what ever it is, it got worse when the engine cooled. also 10 minutes before shutting the engine off vtech was still engaging and the motor was still pulling strong with no check engine lights
- Compression TEST @ ~ 8000 ft altitude and cold engine (CoSprings)
- 130/130/135/135
- From my understanding there's no utility in leakdown if compression test are consistent. Is this true?
- To my knowledge no liquid gaskets
- Engine has ~ 35K miles (it was supposed to be a weekend car, but i coundn't keep it off the track)
- I've used had the car since ~ 23K miles
- I tried the stethescope and coud'nt pinpoint anything previously, I think removving the manifold may be something easy to check
- to add, the buzzing you hear in the video sounds much harsher than when I shut the car down when it was hot, so what ever it is, it got worse when the engine cooled. also 10 minutes before shutting the engine off vtech was still engaging and the motor was still pulling strong with no check engine lights
Last edited by auric; 07-08-2019 at 06:29 PM.
07-08-2019, 07:03 PM
#22
Compression test imo is useless and rough on the battery. A simole leakdown is the abeolute best way to test an engine. And to diagnose exactky what/where the problem is. If a leakdown checks out 100% fine then id reccomend a comorrssion test to see just how good the engine is. But start with leakdown first.
If you do a leakdown and hear air leaking you can open or remove throttle body to hear the air though intake side
If you do a leakdown and hear air leaking you can open or remove throttle body to hear the air though intake side
07-08-2019, 07:12 PM
#23
Compression test imo is useless and rough on the battery. A simole leakdown is the abeolute best way to test an engine. And to diagnose exactky what/where the problem is. If a leakdown checks out 100% fine then id reccomend a comorrssion test to see just how good the engine is. But start with leakdown first.
If you do a leakdown and hear air leaking you can open or remove throttle body to hear the air though intake side
If you do a leakdown and hear air leaking you can open or remove throttle body to hear the air though intake side
I'll do a leakdown tomorrow and follow-up tomorrow.
07-08-2019, 08:03 PM
#25
https://www.s2ki.com/forums/s2000-un...1194502/page5/
I posted video and pics on last page. I had a bent intake valve maybe that can help diagnose
I posted video and pics on last page. I had a bent intake valve maybe that can help diagnose
Thanks for the response.
The sound your car was producing sounds just like mine was prior to me turning the car off and letting it cool off.
07-08-2019, 08:25 PM
#26
It would appear someone used a liquid gasket type material at some point in your engine. I seem to recall Billman stating you should never use this in our engines as pieces will break off and wreak havoc with engine oil pressure especially to the top end. Lots of nasty damage has occurred from using this stuff. Solution? Use OEM gaskets.
07-08-2019, 08:26 PM
#27
07-09-2019, 05:54 PM
#29
Leak Down Test Follow-UP:
1. Bought the tester from Harbor Freight. I'm unsure if the gauge is working, but it did pressurize the cylinder.
2. Leakdown was ~ 15% across the board; but I don't trust the gauge. Seemed finicky.....
3. No air from dip stick/oil filler aperature/pcv system
4. Mild to moderate sound from the throttle body on all cylinders, but worst on 1 and 4.
5. Sound amplified if I opened up the butterfly valve.
- Sounds like it may be a valve issue.
- Should I get a loaner from my local autoparts store, or do I have enough information to draw conclusions?
- Is it possible that all the intake valve bent or should I suspect cams as well?
- I could feel a mild draft as well from C3 when I was checking 4.
- Car has never over heated and I doubt I have a head gasket / warped head but that i curious
1. Bought the tester from Harbor Freight. I'm unsure if the gauge is working, but it did pressurize the cylinder.
2. Leakdown was ~ 15% across the board; but I don't trust the gauge. Seemed finicky.....
3. No air from dip stick/oil filler aperature/pcv system
4. Mild to moderate sound from the throttle body on all cylinders, but worst on 1 and 4.
5. Sound amplified if I opened up the butterfly valve.
- Sounds like it may be a valve issue.
- Should I get a loaner from my local autoparts store, or do I have enough information to draw conclusions?
- Is it possible that all the intake valve bent or should I suspect cams as well?
- I could feel a mild draft as well from C3 when I was checking 4.
- Car has never over heated and I doubt I have a head gasket / warped head but that i curious
07-10-2019, 05:34 AM
#30
If valve lash is adjusted properly, looks like you'll be removing the head and inspecting.
Good luck, with that!
Good luck, with that!