Adjusting Crane 1.7 Roller Rockers

withamc · 02-02-2001, 12:14 PM

I did a search on this subject and didn't find the answer I'm looking for. I installed some Crane 1.7 RR's a few months ago and they seem to be really noisy after it warms up - kinda chimes right in with the exhaust leaks, but that's another story...
When I put them in, the engine wasn't hot by the time I got around to adjusting them. They all went in without any shims at all. I adjusted one cylinder at a time, made sure both valves were closed, tightened till the push rod just stopped turning, then cranked it down tight. Each one tightened 1/2 to 5/8 of a turn after the push rod stopped.
Does that sound like I did it right, or do I need to go back and re-adjust them with the engine warm?

------------------
86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s.

withamc · 02-02-2001, 08:24 PM

Never mind - did a different search and found 93 topics, many of which answered most of my questions. My only unanswered question - do I need to redo this with the engine hot or not? Maybe I need to just live with the noise.

------------------
86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s.

muskrat · 02-03-2001, 07:04 PM

Torque wrench should be set at 24lbs. Shim until wrench pops between 1/2 and 3/4 turn.
Had the same problem. In some cases it won't click between 1/2 and 3/4 but try to get it as close as possible. I am assuming you have pedistal mounts?

02-02-2001, 12:14 PM	#1
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	Adjusting Crane 1.7 Roller Rockers I did a search on this subject and didn't find the answer I'm looking for. I installed some Crane 1.7 RR's a few months ago and they seem to be really noisy after it warms up - kinda chimes right in with the exhaust leaks, but that's another story... When I put them in, the engine wasn't hot by the time I got around to adjusting them. They all went in without any shims at all. I adjusted one cylinder at a time, made sure both valves were closed, tightened till the push rod just stopped turning, then cranked it down tight. Each one tightened 1/2 to 5/8 of a turn after the push rod stopped. Does that sound like I did it right, or do I need to go back and re-adjust them with the engine warm? ------------------ 86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s.

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02-02-2001, 08:24 PM	#2
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	Never mind - did a different search and found 93 topics, many of which answered most of my questions. My only unanswered question - do I need to redo this with the engine hot or not? Maybe I need to just live with the noise. ------------------ 86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s.

02-03-2001, 07:04 PM	#3
muskrat Registered Member Join Date: Mar 1999 Location: va Posts: 35	Torque wrench should be set at 24lbs. Shim until wrench pops between 1/2 and 3/4 turn. Had the same problem. In some cases it won't click between 1/2 and 3/4 but try to get it as close as possible. I am assuming you have pedistal mounts?