Is it possible to install a cam without taking off the head?
01-27-2010, 11:12 PM
#1
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Is it possible to install a cam without taking off the head?
just wondering if its possible to install a cam without taking the head off. its a 22r engine. my buddy redid his head about a 6 months ago and he wants to put a engnbldr 261 cam in. any info is appreciated. thanks.
01-27-2010, 11:33 PM
#2
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well.
uh..
i wouldnt say he should try.
i mean, a head gasket itself is actually relatively cheap to replace.
plus, you have to take most of the top end of the engine apart to get to it anyways, might as well just pull the head anyways
uh..
i wouldnt say he should try.
i mean, a head gasket itself is actually relatively cheap to replace.
plus, you have to take most of the top end of the engine apart to get to it anyways, might as well just pull the head anyways
01-28-2010, 12:11 AM
#3
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you have to remove the rocker assembly to remove the cam. In order to remove the rocker assembly you have to remove the head bolts.
By removing the headbolts, you've effectively taken away the compression the head has to the block sealing the head gasket.. therefore compromising the headgasket.
You're call buddy. Chance of oil and coolant leaking between the gasket mating surfaces is most probable.
By removing the headbolts, you've effectively taken away the compression the head has to the block sealing the head gasket.. therefore compromising the headgasket.
You're call buddy. Chance of oil and coolant leaking between the gasket mating surfaces is most probable.
01-28-2010, 09:20 AM
#4
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I wouldn't do it. to get to the cam you have to remove the rockers and those are held on by the 10 head bolts, and when you remove those you loosen the head. Head gaskets are squish use, so after they are compressed for the first time, whether run on or not, they are done. Once loosened, they are history, in my book. It's up to you, but I wouldn't.
Now, on a differnt project: swapping from bolts to ARP studs, you can safely do without doing the head gasket. You can do one at a time, instead of all 10. I know that was random. Good luck.
Now, on a differnt project: swapping from bolts to ARP studs, you can safely do without doing the head gasket. You can do one at a time, instead of all 10. I know that was random. Good luck.
01-28-2010, 09:26 AM
#5
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x2 on the studs.
Plus once you take all the head bolts out to pull the rocker assembly... you usually need a little persuasion to get the rocker train off and that's going to wreck the headgasket by the subtle movement.
Plus once you take all the head bolts out to pull the rocker assembly... you usually need a little persuasion to get the rocker train off and that's going to wreck the headgasket by the subtle movement.
01-28-2010, 12:18 PM
#6
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Yeah it could be done, but not recomended. Like mentioned before, you have to take the rockers off and losen the bolts. Once you do that your gasketdoesn't have the good seal it once had and its been crushed for how long? So when you put it all back together you may have some leakage. Best to do it right the first time.
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01-28-2010, 05:16 PM
#9
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I have two cents to add. I did say earlier that I would not try it, and I still wouldn't. BUT, if it makes things easier on you, I had a buddy reuse a head gasket on his 1.8T VW motor, and it's been running for 2 years now with no problems. Do I agree? No. Would I do it? Definately not.
A head gasket is what, $50 bucks? And new head bolts are what, $20? Might as well do it THE RIGHT WAY the first time. Once again, that's my opinion, and where I'm from, it usualy doesn't matter. But, take it for what it's worth.
A head gasket is what, $50 bucks? And new head bolts are what, $20? Might as well do it THE RIGHT WAY the first time. Once again, that's my opinion, and where I'm from, it usualy doesn't matter. But, take it for what it's worth.
01-28-2010, 09:10 PM
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well in a proper way to replace the chain the head and everything has to be installed on the motor anyway before mounting the cam gear to the head...soooo...it will work and is the way that i would do it to make it easy on myself...soooo....
when you remove the cam gear with the chain on it you must (i think you turn the gear to the right as to leave the slack in between the two guides remain on top of the crnk gear and keeping the chain on the crank properly..the remove the (i think 8 bolts) holding the rocker arm assy to the head in the proper order to have less stress on the assy and you dont crack or damage anything...let me know if i can help more
when you remove the cam gear with the chain on it you must (i think you turn the gear to the right as to leave the slack in between the two guides remain on top of the crnk gear and keeping the chain on the crank properly..the remove the (i think 8 bolts) holding the rocker arm assy to the head in the proper order to have less stress on the assy and you dont crack or damage anything...let me know if i can help more
01-28-2010, 09:44 PM
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well, this is for my buddy's truck. im trying to convince him to replace the head with the engnbldr head with cam and oversized pistons. im not sure if he wants to do the gasket again since he just did the head gasket 6 months ago.
01-28-2010, 10:33 PM
#14
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01-28-2010, 11:27 PM
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I say yes cause tim does! Page 3, post #52, Tim at DOA Engines, http://pirate4x4.com/forum/showthrea...=537816&page=3
01-29-2010, 09:49 AM
#16
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Sorry..... not true... replacing a camshaft with the head in place, and replacing a head gasket are two completely different jobs!!.
When you R&R a head on 22RE you have to remove the exhaust manifold - big potential for problem with the head studs. You have all those connections with the intake. Like someone posted, if you do a head gasket you really should have the head checked for cracks and flatness. Then there's the time to collect ALL those new gaskets you will need. Then you get to put EVERYTHING all back together!! That may take some guys 4 or 5 hours, for me to do it right (after I have all the parts and everything has been cleaned up) is a full day and part of a night.... but I'm slower than average.
gNARLS.
When you R&R a head on 22RE you have to remove the exhaust manifold - big potential for problem with the head studs. You have all those connections with the intake. Like someone posted, if you do a head gasket you really should have the head checked for cracks and flatness. Then there's the time to collect ALL those new gaskets you will need. Then you get to put EVERYTHING all back together!! That may take some guys 4 or 5 hours, for me to do it right (after I have all the parts and everything has been cleaned up) is a full day and part of a night.... but I'm slower than average.
gNARLS.
BTW: Always use genuine toyota rockers. The aftermarket stuff is crap.
02-05-2010, 06:22 PM
#17
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saw engnbldr ted today and picked up an epn 268. head is staying on for the change over. i'm draining some coolant and removing the plugs. fingers x'd for the minimum effort.
02-05-2010, 06:56 PM
#18
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I don't know how well it would work with the engine in, but there's room on top of the head fore and aft of the rocker assembly for some ratchet straps. If you can get them wrapped around there they might help prevent the head from shifting. Might also make it move when it otherwise wouldn't have. I don't know. Has anyone tried it?
My old rocker assembly was stubborn coming off. I suspect backing off the adjusting screws would have helped.
My old rocker assembly was stubborn coming off. I suspect backing off the adjusting screws would have helped.
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