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Author Topic: Stright cut oil pump gears.  (Read 2306 times)

Offline Matt Vangaalen

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Stright cut oil pump gears.
« on: February 10, 2012, 01:07:07 pm »
While taking my 7 bolt motor apart I noticed the helical pump gears were wearing away at front case. I bought a new front case for the 6 bolt motor and used straight cut pump gears instead, for better oil pressure and longevity of the case. Straight cut gear noise is what I believe is the cause of the bearing whine I thought I had. So many sleepless nights. I will try to confirm this weekend. If I do confirm that its just the gears I will live with it because I feel oil pressure is more important than sounding cool.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline KevinBuckham

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Re: Stright cut oil pump gears.
« Reply #1 on: February 10, 2012, 03:17:47 pm »
The helical gears will provide a bit more side load, but I'll bet you are sucking air if you are seeing wear issues between the gears and case.  The helical gears should actually provide a bit more oil pressure/volume than the straight cut gears.  (Helical gears have a bit more gear to gear contact area than the straight cut gears which should provide a bit more flow although I'm sure it's insignificant.)
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Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #2 on: February 10, 2012, 07:35:09 pm »
Thinkin about surface grinding case I believe the driven gear may be bouncing back and forth causing the rattle.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Brett Haviland

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Re: Stright cut oil pump gears.
« Reply #3 on: February 10, 2012, 08:57:21 pm »
huh???

so you swapped a 6 bolt front cover/oil pump onto a 7 bolt engine? that would screw with the timing marks for the crank, but besides that i never noticed the difference between 6 bolt and 7 bolt oil pump gears..  i have just delt with the strait cut 6 bolt style oil pump gears personally and have never experienced any "whine" as far as i know.....

sometimes i have had the idlers or the water pump "whine" or howl in the morning if you tighten the timing belt or alt/water pump belt too tight. Maybe that is what your hearing?

first you say its "whine".... then you say its a "rattle"......    which one is it???  OH ,,,  where r u from matt?
« Last Edit: February 10, 2012, 09:01:49 pm by Brett Haviland »
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Offline Brent Hunter

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Re: Stright cut oil pump gears.
« Reply #4 on: February 10, 2012, 09:08:54 pm »
I know from experience that somtes when a water pump starts to go "whines"
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Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #5 on: February 10, 2012, 11:08:01 pm »
Its a new oem water pump and timing parts. I put the 6 bolt block in my 96 talon with a new 6 bolt front case with straight gears. I'm thinking there is too much clearance between the block and case and the driven gear is bouncing.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Brett Haviland

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Re: Stright cut oil pump gears.
« Reply #6 on: February 11, 2012, 08:14:51 am »
never heard of that before...  maybe post up a sound clip/vid of what it sounds like?
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Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #7 on: February 11, 2012, 10:06:10 am »
Brett I'm in North Delta if anyone wants to come have a listen I think I'm tearing my timing cover off again today. I don't know how to post sound clips.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Greg Durban

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Re: Stright cut oil pump gears.
« Reply #8 on: February 11, 2012, 11:45:55 am »
Maybe try tossing it on youtube and then posting a link??
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Offline Paul Pigar

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Re: Stright cut oil pump gears.
« Reply #9 on: February 11, 2012, 07:05:43 pm »
Am in Surrey, i could swing by.
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-98 talon tsi awd   -94 acura integra non-vtec
-96 talon tsi awd converted to eclipse gsx
-95 talon esi(sold)
-94 eclipse non-turbo(sold)
-91 talon tsi fwd(daily driver)
-90 nissan 300zx(sold)
-96 eclipse gs spyder
-98 eclipse spyder awd swap
-98 eclipse gs-t(traded)

Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #10 on: February 11, 2012, 07:09:01 pm »
Paul were FB friends now send me a msg through that maybe we should meet somewhere tomorrow?
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #11 on: February 11, 2012, 07:12:36 pm »
Let's plan an undercover spot where abouts in surrey r u? Superstore on 82nd and Scott rd has sweet covered lot.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Paul Pigar

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Re: Stright cut oil pump gears.
« Reply #12 on: February 11, 2012, 07:14:39 pm »
Just in the Patullo bridge area.
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-98 talon tsi awd   -94 acura integra non-vtec
-96 talon tsi awd converted to eclipse gsx
-95 talon esi(sold)
-94 eclipse non-turbo(sold)
-91 talon tsi fwd(daily driver)
-90 nissan 300zx(sold)
-96 eclipse gs spyder
-98 eclipse spyder awd swap
-98 eclipse gs-t(traded)

Offline Matt Vangaalen

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Re: Stright cut oil pump gears.
« Reply #13 on: February 11, 2012, 07:17:10 pm »
6048372216 shoot me a txt and ill call u tomorrow to see if we can find a time.
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6 bolt short block (.02 over evo9 pistons). Straight cut oil pump gears. Ported 2g head and manifolds, GSC S1 cams(adjustable gears), undercut SS valves, bronze guides, Manley springs. Fp's Big T28, stock 02 into 2.5 downpipe, 3" from the flex section back. Apex'i N1 muffler. ETS fmic. 1g bov. 1g throttle body. 255lph pump. 660cc injectors. AFPR. SD on Link V3. 345 ft lbs 345 hp.

Offline Paul Pigar

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Re: Stright cut oil pump gears.
« Reply #14 on: February 11, 2012, 07:20:12 pm »
sure man.
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-98 talon tsi awd   -94 acura integra non-vtec
-96 talon tsi awd converted to eclipse gsx
-95 talon esi(sold)
-94 eclipse non-turbo(sold)
-91 talon tsi fwd(daily driver)
-90 nissan 300zx(sold)
-96 eclipse gs spyder
-98 eclipse spyder awd swap
-98 eclipse gs-t(traded)
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