Engine seized!

SiahNyde

Member

Dec 3, 2010

125

1

17

Oregon

Apr 22, 2011

#21

• Apr 22, 2011

• #21

We did replace the chains and guides, we just didn't upgrade the heads. And the cams were a custom ground from a shop with extensive cam experience, but he had never done 4.6 cams, much less blower cams. the way that the timing jumped, I figured that may have been the cause.

 

Maxium

Member

Jul 22, 2009

33

2

9

Apr 22, 2011

#22

• Apr 22, 2011

• #22

Forgive my ignorance if I'm wrong here, but wouldn't the marks on the chain and the sprocket not line up after starting the car after the initial timing has been done and only line up after "x" amount of revolutions?

 

Coyote5.0

5 Year Member

Aug 27, 2010

625

102

64

Portage, Wisconsin

Apr 22, 2011

#23

• Apr 22, 2011

• #23

The engine seized before the timing chain broke? Damn, those chains are tougher than I thought they were.

 

N8Dogg98

15 Year Member

Apr 4, 2005

3,872

238

184

MN

Apr 22, 2011

#24

• Apr 22, 2011

• #24

Tighter than a nun's c**t

Tighter than....

 

98COBRA281

10 Year Member

Nov 24, 2007

1,348

30

59

Port St. Lucie, Florida

Apr 22, 2011

#25

• Apr 22, 2011

• #25

SiahNyde said:

We did replace the chains and guides, we just didn't upgrade the heads. And the cams were a custom ground from a shop with extensive cam experience, but he had never done 4.6 cams, much less blower cams. the way that the timing jumped, I figured that may have been the cause.

Click to expand...

thats correct, they only realign once ever 48 revolutions i believe....

 

J

jason1122

New Member

Apr 18, 2011

11

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0

Apr 22, 2011

#26

• Apr 22, 2011

• #26

Boom!!

 

SiahNyde

Member

Dec 3, 2010

125

1

17

Oregon

Apr 22, 2011

#27

• Apr 22, 2011

• #27

98COBRA281 said:

thats correct, they only realign once ever 48 revolutions i believe....

Click to expand...

Well judging by piston 3 being TDC, it was revolution 48, and based on that, the timing was way jacked up!
Haha, jk...but seriously...i didn't know that the marks didn't stay lined up


---> I'm thinking that after we pull the heads to verify that our pistons are acceptable, we'll look into a trickflow TW heads and the whole shebang.
Any input on trickflow or any other recomendations?

 

SiahNyde

Member

Dec 3, 2010

125

1

17

Oregon

Apr 22, 2011

#28

• Apr 22, 2011

• #28

N8Dogg98 said:

Tighter than a nun's c**t

Tighter than....

Click to expand...

...Vin diesel's ass....wait... no... I mean the opposite

 

S

stephensc

New Member

Apr 22, 2011

8

0

0

Apr 22, 2011

#29

• Apr 22, 2011

• #29

Thats an interesting place for the roller followers to be cracked at... right in between the hydraulic lifter and the cam shaft. If the piston had hit the valve wouldn't the roller follower be cracked in a different location; like between the cam and valve stem?

 

98COBRA281

10 Year Member

Nov 24, 2007

1,348

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Port St. Lucie, Florida

Apr 23, 2011

#30

• Apr 23, 2011

• #30

when i collapsed a lifter it knocked the rocker arm off also, but it didnt crack like that!!!

 

S

stephensc

New Member

Apr 22, 2011

8

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0

Apr 23, 2011

#31

• Apr 23, 2011

• #31

A couple of the lifters were collapsed... Interesting.

 

98COBRA281

10 Year Member

Nov 24, 2007

1,348

30

59

Port St. Lucie, Florida

Apr 24, 2011

#32

• Apr 24, 2011

• #32

stephensc said:

A couple of the lifters were collapsed... Interesting.

Click to expand...

how high do you rev the car? mine were he original ford one's with about 100k miles on them, it let go just under 7000 rpms

 

SiahNyde

Member

Dec 3, 2010

125

1

17

Oregon

Apr 24, 2011

#33

• Apr 24, 2011

• #33

rev limiter was set to 6500, so it should been ok