Blown Head Gasket?

Tiny
TRISCUIT
  • MEMBER
  • 76 POSTS
Oh, I included a picture of the upper timing gear attached to the camshaft so you could see it. The crankshaft is right on at TDC. The dot on the gear attached to the camshaft seems a couple teeth too far to the left when looking straight on. Here are the pics again.

How is it the chain’s position makes a difference? It’s the same length no matter where it’s positioned so how does that change the timing? It looks like it may have jumped a couple of teeth.
Was this
answer
helpful?
Yes
No
Wednesday, March 20th, 2024 AT 4:21 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
I agree with you. It does appear to be at least a tooth-off. That will certainly cause power loss and poor running conditions. Actually, it could prevent it from running.

The chain needs to be loosened, and the cam gear needs turned to get it at the right point. Remember, there are tensioners that can cause it to be pulled and force the chain to be off.

Joe
Was this
answer
helpful?
Yes
No
+1
Wednesday, March 20th, 2024 AT 5:57 PM
Tiny
TRISCUIT
  • MEMBER
  • 76 POSTS
Okay, I picked up the pressure tested, machined cylinder head. The machinist changed the valves and seats (?) And installed bronze ones. Right now, I’m going to start to remove more items from the engine bay so that I can fix the timing chain.

But I was looking at the head and realized one side of the valve train (is that correct) is missing the metal posts that are present on the other side. Is this normal or did the machinist forget them?

I attached a photo so you can see what I mean. One side has an arrow pointing to the metal post and the other side has an arrow showing a ballpoint pen in the empty space I’m unclear about.
Was this
answer
helpful?
Yes
No
Wednesday, March 27th, 2024 AT 7:09 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

That doesn't look right. Is the opposite side the same? If it isn't, you need to take it back and ask. It won't draw tight evenly this way.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Thursday, March 28th, 2024 AT 7:44 PM
Tiny
TRISCUIT
  • MEMBER
  • 76 POSTS
I looked at pictures as best I could to see if other 22RE cylinder heads looked the same and from what I could see, they are. Most photos are from angles that don’t show what Im referring to very well but I found a couple and it looked like the intake sides have the dowels/guides and the exhausts don’t.

I called the machinist and sent him a video and he said that it’s correct. He looked at another 22RE head he had and said it also was the same. So, although it seems strange, I guess it’s correct.

Back to removing the timing chain...
I’ll post an update again soon.
Was this
answer
helpful?
Yes
No
Sunday, March 31st, 2024 AT 12:55 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Thanks for the update. Let me know how things turn out for you.

Joe
Was this
answer
helpful?
Yes
No
Monday, April 1st, 2024 AT 3:42 PM
Tiny
TRISCUIT
  • MEMBER
  • 76 POSTS
Update: I finally got the machined head and new gasket on, and the camshaft dot was about 15 degrees BTDC. I rotated it with a punch until it was about correct, but still need to do so a little more. This was done WITHOUT the chain being connected to the crankshaft.

At this point, I figured the crankshaft was off by so much because it was machined, and new valves and guides were installed. Is rotating it separate of the crankshaft, correct? Truly, I don't see how I'd get everything to line up without doing so, I just want to make sure I'm not going to end up with valves and pistons that collide.

I realized that I'd installed the chain incorrectly, previously. There are two shiny links that are really hard to distinguish and are basically only visible in the correct light and from a certain angle. The chain I have has 8 "max top" links, so I thought that centering two of those at the dot on the camshaft was correct, but it wasn't. I see that now.

The crankshaft hasn't been moved whatsoever since I took everything apart. I'm figuring this: rotate the camshaft a little more clockwise so that that dot, key, and bottom bright link on the chain are all in alignment. Then, put the bottom bright link on the crankshaft at the dot, reattach the crankshaft gear and timing chain, then insert the distributor to make sure the rotor points to the first spark plug position. If all of that is correct, that means I'm still at TDC on the first piston. What do you think? Am I doing this correctly?

I included a picture of the crankshaft gear and chain zip tied to it. The shiny link is right on the crankshaft gear's dot, and as you can see, the gear is slightly BTDC. This is after I'd rotated it a bit already, but it still needs to be rotated clockwise a bit more so that I can get the bottom link on the correct tooth of the camshaft gear.
Was this
answer
helpful?
Yes
No
Monday, April 15th, 2024 AT 6:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

What you have done sounds correct. When you turn the cams/crank, to get them in time requires that you turn them separately. When you do it, just make sure to slowly turn them. If you feel resistance, don't force anything.

If you have the marks where they belong, it should be fine. Once there, turn it by hand to make sure it doesn't make contact internally. Turn the crankshaft several rotations. If it is going to make contact, you will know.

Let me know how things turn out for you.

Joe
Was this
answer
helpful?
Yes
No
Monday, April 15th, 2024 AT 7:54 PM

Please login or register to post a reply.

Sponsored links