Braapdaddy
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- Joined
- Nov 23, 2020
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- 371
Do a leakdown test on #3. I think you’ll find a valve sealing issue.Latest update did a compression test on all cylinders .....cylinder 3 or the third from the left has zero compression all others immediately jump to 180 and hold
Strange was I swear one time out of the 5 or 6 times I tried this cylinder it also jumped immediately up but now I cannot replicate
So has a lifter collapsed ?
Here are my new MB plugs with literal minutes of run time from right to left
With zero compression at all is that possible ??Do a leakdown test on #3. I think you’ll find a valve sealing issue.
Yes.With zero compression at all is that possible ??
Valve is bent - that's the only reason it did not fall into the combustion chamber. It is probably not sealing, so hence you have no compression.
Thank you for the insight I do see what you mean by below the guide and the scenario of it being slightly lower basically one edge hitting the ring seal surface before the whole surface sealsCheck the valve height with valves closed. If the one with the broken spring is lower than the others then the valve is bent. Likely below the guide if you can rotate the valve. I’d be impressed if it wasn’t bent.
You need to pull the head.Thank you for the insight I do see what you mean by below the guide and the scenario of it being slightly lower basically one edge hitting the ring seal surface before the whole surface seals
Getting a accurate measurement will be a task but I will see what I come up with ..... If this is the case then I guess I have a bridge to cross on lifting the head or not
Hopeful but prepared for a bent valve
Excellent Read and thank you for the info I read the whole post .... I will say this much when my valve is pulled up and twisted it shows zero signs of wobble or out of round and will slide down to the point it would drop in the cylinder if it was let to but I kept my magnet on itNot sure if you saw this:
2008 Toyota Camry V6 P0303
Clearly you're doing the repair the right way. Do you think it's possible for someone that just wanted to get it back on the road to pull the one cam and just replace the broken spring and rocker arm? I wouldn't say that I am doing it the "right way," but I am doing slightly more than the bare...bobistheoilguy.com
Broken valve spring, misfire under load. Leakdown was perfect. Valve was bent, but it sealed perfectly.