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91-96 engines use a 35mm lifter, which are available in a lightweight design sold on the 60V6 store here. 97 went to the smaller diameter lifters so there are no options for them that I am aware of other than aftermarket stock replacements.
4.6 SOHC Ford springs (from a 97 thunderbird) will fit the 3.4 DOHC. They are a little stiffer and coil bind at a higher lift so a cam regrind will be tolerated more easily with them. You will need to use the 4.6 valve guide seals/seats, and pull the seal out. Then grind the seat part so the lip for the stock seal is gone. When you install the stock 3.4 seals to the guide, the 4.6 seat will fit over it easily. Comp Cams 26113 is the spring I used for test fitting. Manley also makes some springs but they are a lot stiffer and I haven't tested those.
Comp steel retainers for the 26113 spring are also recommended, along with the keepers. The retainers weigh 8.4 grams compared to the 13 grams for the stockers. There are also titanium versions available but I haven't bought any to weigh.
No known valves other than custom.
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3.4 DOHC Valvetrain
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Created by:
SappySE107
- Published: 04-14-2010, 01:15 AM
- 0 comments
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by SchurkeyDug up the GM Service Bulletin for "Lifter tick when cold", 57-61-09. '91 to '95 LQ1 (VIN X) (mymonte.com is gone) The parts kit has been discontinued by GM long ago. My quest was to find sources for those parts; and complete the procedure on my '93 Lumina Euro 3.4 which was torn apart to replace the rear head gasket. There are three critical part numbers in the GM service kit (aside from gaskets and O-rings) required to perform this operation. Two of the three are readily available in the afterm...
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Channel: 1991-1997 DOHC
03-02-2012, 02:48 PM -
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Channel: 1991-1997 DOHC
01-20-2011, 12:08 PM -
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by Dave96z34The 97 4T65 in the Monte Carlo is almost bullet proof. I have been beating the crap out of my reman with my blower now for 2.5 years of daily driving vs the 60 NA that I couldn't get 1 year out of. 4 Trans in 50K miles. I'm a violent offender. Overfilling and royal purple atf are my secret. DHP will do 96 and 97 DOHC tuning, HPTuners only works with the 97 computer. 96 can not change line pressure, 97 can. 97 bin is double in size of the 96 bin. They changed every thing and it has every ...
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Channel: 1991-1997 DOHC
04-17-2010, 04:53 AM -
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by SappySE107Here is the TRW catalogue spec sheet for the 91-95 as well as the 96/97 pistons....
TRW 3.4 DOHC Pistons
Silvolite 3.4 DOHC Pistons Notice that the 96-97 pistons don't have as much compression distance but also have a dome to them. I dont know the exact amount of compression loss you will get when using these pistons with the 91-95 heads, but it goes against the common belief that 96 pistons raise compression. The Silvolite pistons are the EXACT pistons used in the 91--
Channel: 1991-1997 DOHC
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Channel: 1991-1997 DOHC
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