Re: Help! doing the 4.0 head swap on a 258!
 

See following article:

http://monsterslayer.com/jeep/40Head/40Head.htm

The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
the pushrods down.

Bill


"Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to
put
> the 258 stock rockers and pushrods back in, my valves were opened on #1
cyl
> when its at TDC. AS we all know this is not good for compression.
Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

See following article:

http://monsterslayer.com/jeep/40Head/40Head.htm

The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
the pushrods down.

Bill


"Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to
put
> the 258 stock rockers and pushrods back in, my valves were opened on #1
cyl
> when its at TDC. AS we all know this is not good for compression.
Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

See following article:

http://monsterslayer.com/jeep/40Head/40Head.htm

The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
the pushrods down.

Bill


"Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to
put
> the 258 stock rockers and pushrods back in, my valves were opened on #1
cyl
> when its at TDC. AS we all know this is not good for compression.
Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

This site implies using the 4.2 rockers and pushrods.

http://www.off-road.com/jeep/new/40conv.html

Rockers and rods aren't on the needed parts list.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> See following article:
>
> http://monsterslayer.com/jeep/40Head/40Head.htm
>
> The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
> the pushrods down.
>
> Bill
>
> "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > Folks, I'm in a pickle!
> > Hope you can help me. I'm in the process of doing the head swap on my '86
> > CJ7. Got the head installed no problem. Here's my catch, when I went to
> put
> > the 258 stock rockers and pushrods back in, my valves were opened on #1
> cyl
> > when its at TDC. AS we all know this is not good for compression.
> Apparently
> > either my pushrods are too long or something in the rockers is amiss. Got
> > any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> > instead of the old 258 engine parts?
> > Thanks for your help.
> > Rich Harris
> >
> >

Re: Help! doing the 4.0 head swap on a 258!
 

This site implies using the 4.2 rockers and pushrods.

http://www.off-road.com/jeep/new/40conv.html

Rockers and rods aren't on the needed parts list.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> See following article:
>
> http://monsterslayer.com/jeep/40Head/40Head.htm
>
> The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
> the pushrods down.
>
> Bill
>
> "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > Folks, I'm in a pickle!
> > Hope you can help me. I'm in the process of doing the head swap on my '86
> > CJ7. Got the head installed no problem. Here's my catch, when I went to
> put
> > the 258 stock rockers and pushrods back in, my valves were opened on #1
> cyl
> > when its at TDC. AS we all know this is not good for compression.
> Apparently
> > either my pushrods are too long or something in the rockers is amiss. Got
> > any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> > instead of the old 258 engine parts?
> > Thanks for your help.
> > Rich Harris
> >
> >

Re: Help! doing the 4.0 head swap on a 258!
 

This site implies using the 4.2 rockers and pushrods.

http://www.off-road.com/jeep/new/40conv.html

Rockers and rods aren't on the needed parts list.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> See following article:
>
> http://monsterslayer.com/jeep/40Head/40Head.htm
>
> The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
> the pushrods down.
>
> Bill
>
> "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > Folks, I'm in a pickle!
> > Hope you can help me. I'm in the process of doing the head swap on my '86
> > CJ7. Got the head installed no problem. Here's my catch, when I went to
> put
> > the 258 stock rockers and pushrods back in, my valves were opened on #1
> cyl
> > when its at TDC. AS we all know this is not good for compression.
> Apparently
> > either my pushrods are too long or something in the rockers is amiss. Got
> > any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> > instead of the old 258 engine parts?
> > Thanks for your help.
> > Rich Harris
> >
> >

Re: Help! doing the 4.0 head swap on a 258!
 

This site implies using the 4.2 rockers and pushrods.

http://www.off-road.com/jeep/new/40conv.html

Rockers and rods aren't on the needed parts list.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

William Oliveri wrote:
>
> See following article:
>
> http://monsterslayer.com/jeep/40Head/40Head.htm
>
> The way I read it, use all 4.0L parts regarding the head and 4.2L parts from
> the pushrods down.
>
> Bill
>
> "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > Folks, I'm in a pickle!
> > Hope you can help me. I'm in the process of doing the head swap on my '86
> > CJ7. Got the head installed no problem. Here's my catch, when I went to
> put
> > the 258 stock rockers and pushrods back in, my valves were opened on #1
> cyl
> > when its at TDC. AS we all know this is not good for compression.
> Apparently
> > either my pushrods are too long or something in the rockers is amiss. Got
> > any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> > instead of the old 258 engine parts?
> > Thanks for your help.
> > Rich Harris
> >
> >

Re: Help! doing the 4.0 head swap on a 258!
 

That's got to be it, especially since Harris, seemed more concerned
about number one tight, than the others.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> No.
>
> You have 2 TDC's. One has the valves closed, one has them both open.
> Check the distributor's position.
>
> Mike

Re: Help! doing the 4.0 head swap on a 258!
 

That's got to be it, especially since Harris, seemed more concerned
about number one tight, than the others.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> No.
>
> You have 2 TDC's. One has the valves closed, one has them both open.
> Check the distributor's position.
>
> Mike

Re: Help! doing the 4.0 head swap on a 258!
 

That's got to be it, especially since Harris, seemed more concerned
about number one tight, than the others.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> No.
>
> You have 2 TDC's. One has the valves closed, one has them both open.
> Check the distributor's position.
>
> Mike