Engine jumped time when turning over

[cynxe]

This morning, i was placing my cam angle sensor on and i dropped a washer down my timing cover, not thinking about it i went and turned the engine over. I didnt have it running. I heard compression, then slowly there was no compression in any cylinders. Sounded like no spark plugs. I retimed the engine and went to fire it up and it was straight no compression. Whats the odds that every single exhaust valve got bent by the starter???

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[Kingtal0n]

Do a compression test?

Honestly its probably the one tool everybody should have when they want to own or work on 10+ year old engine(s). I have my old trusty unit by my bed, because I know that any second... I am going to jump out of bed and question the squeeze under some random hood....

I've only "seen" an sr20 jump timing ONCE in my entire life, and I still do not know why it did. I had just finished installing cams (I feel the intended lack of oil at the tensioner was partially responsible), the tensioner had just popped and I was turning the motor with a ratchet like I always do to pull the slack out of the chain. I looked at the gears and they looked right. I cranked the engine to see oil (it was a cam install) put the cover on then tried to start it. It started, but it sounded really really weak, and touching the gas pedal did nothing. I knew right away that the timing had jumped.

never seen it before, never happened again.

[cynxe]

Do a compression test?

Honestly its probably the one tool everybody should have when they want to own or work on 10+ year old engine(s). I have my old trusty unit by my bed, because I know that any second... I am going to jump out of bed and question the squeeze under some random hood....
I have 0 compression on all cylinders. When i turn it over it has the same sound and feel like if you removed all spark plugs

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[Kingtal0n]

so step 2:

pull valve cover, take pictures, verify timing (or post pics and we will do it)

If valves are hanging open because they are bent, you might see that many valves appear to be open (once you remove the valve cover) even though the cam lobe isnt pressing them open. I've only bent valves on chevy engines so I can't say for sure the human eye will detect the height difference, but you may be able to measure it.

[cynxe]

so step 2:

pull valve cover, take pictures, verify timing (or post pics and we will do it)

If valves are hanging open because they are bent, you might see that many valves appear to be open (once you remove the valve cover) even though the cam lobe isnt pressing them open. I've only bent valves on chevy engines so I can't say for sure the human eye will detect the height difference, but you may be able to measure it.
I will get pictures of marks and valves, in a couple of hours. Check back with me please. Ill post

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[Kingtal0n]

I will get pictures of marks and valves, in a couple of hours. Check back with me please. Ill post

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theres plenty of people watching the forum that know how to time an SR

I am leaving you in good hands :D

just dont believe anything that anyone from florida says and you shall be fine

[cynxe]

theres plenty of people watching the forum that know how to time an SR

I am leaving you in good hands :D

just dont believe anything that anyone from florida says.
Baha this is an rb25

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[cynxe]

Baha this is an rb25

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Lol this is an rb25 and no one wants to reply or offer up their knowledge

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[Kingtal0n]

Well all engines operate on the same principle (piston engines). I can only imagine that an RB25 will have the same characteristic as an sr20: the lobes of the camshafts would probably be facing outwards on piston #1 TDC. Thats just my guess though. Dont you have an FSM?

Learn to read the FSM because it carrys over into any vehicle. I can buy a random car, lets say a honda civic for example (god forbid!). But if I did happen to pick one up, I could fix anything without prior knowledge, because the FSM tells me how...

[cynxe]

Well all engines operate on the same principle (piston engines). I can only imagine that an RB25 will have the same characteristic as an sr20: the lobes of the camshafts would probably be facing outwards on piston #1 TDC. Thats just my guess though. Dont you have an FSM?
Well i do but i literally dont understand it. As it has 400+ pages on a pdf

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[Kingtal0n]

Well i do but i literally dont understand it. As it has 400+ pages on a pdf

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Just get some pics of the timing gears and crankshaft all at once and start there.

[cynxe]

Just get some pics of the timing gears and crankshaft all at once and start there.
Alright will do! Ill grab pics of cams as well

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[cynxe]

8507585076850778507885079

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[cynxe]

Just get some pics of the timing gears and crankshaft all at once and start there.
The picture from above shows the piston TDC

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[Kingtal0n]

how do you know piston 1 is tdc, I dont see a crank pulley. Did you stick something in there and feel it? does that little mark on the sprocket mean tdc?

If the cam lobes are facing outwards on cylinder number 1 when it is at tdc thats usually correct. If you think at this point you have a bent valve(s) you need to do a leakdown test. Put the car in gear and test cylinder number 1 with it top dead center while the cam lobes face out (you are sure the valves are shut) and use the leakdown tester to find where the squeeze goes.

[cynxe]

how do you know piston 1 is tdc, I dont see a crank pulley. Did you stick something in there and feel it? does that little mark on the sprocket mean tdc?

If the cam lobes are facing outwards on cylinder number 1 when it is at tdc thats usually correct. If you think at this point you have a bent valve(s) you need to do a leakdown test.
That notch that the dot on the crank gear is pointing to means TDC

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