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I supported Toymods
Location:
Northern Beaches
Registered:
May 2002
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Knock in head
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Sat, 15 February 2003 00:14
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When the motor warms up there is a knock that is comming we are fairly sure from the head.
Our guess is its the cam bearings, how hard are these to replace? In the book I have it says if bearings a stuffed, replace cylender head am cams, now im hoping this is some sort of miss type 
What else could be a knock in the head?
its not a tap like tappets, its a definite knocking that increases with revs but only when motor is warm
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Knock in head
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Sat, 15 February 2003 02:27
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Nope its not a misprint  there are no bearings for the cams in a G head, they sit in a machined piece of the head, thats why if you have scraped cam holders you throw the head away, the only thing other than the cams that I could think of is the alternator driven gear but its highly unlikely that it would "knock"
if it increases with revs Id say you should start looking for a new head 
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Location:
Brisbane
Registered:
December 2002
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Re: Knock in head
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Sat, 15 February 2003 04:21
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mate i dont think its the head. i recon u have a spun big end. its caused by revving the shit out of the engine too often. And it increases with revs.
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Location:
Brisbane
Registered:
December 2002
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Re: Knock in head
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Sat, 15 February 2003 04:22
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forgot to mention that is quite common amoungst 7mge/gtes, 1ggtes and also some 1jzgtes.
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I supported Toymods
Location:
Northern Beaches
Registered:
May 2002
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Location:
Gippsland Victoria
Registered:
January 2003
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Re: Knock in head
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Sun, 16 February 2003 03:38
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i had a hillman engine in a buggy that was doing that. i looked at the head and everything but found nothing. after a while, the engine threw a con rod out the side. as it turns out, the last fella that worked on the engine (not me) didnt do the bolts up on the con rod propely. donno whether this helps u but it was an important lesson to me
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