Re: Low Oil Pressure After Oil Filter Change
[Re: 6PakBee]
#2968123
09/28/21 11:39 AM
09/28/21 11:39 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
OP
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OP
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Indiana
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I will look at that one lobe tonight to confirm why it looks shiny, and I will mark each lifter upon removal. I have not decided if I will be reusing this cam/lifter set at this time.
Once I have the block on the stand, I am going to take pictures of all of the plugs per this thread. So when it goes back together I know where they should all be located.
Thanks!!
EDIT: I checked the shiny lobes and they look fine. It appears to be the lighting that affected the two lobes.
Last edited by YO7_A66; 09/29/21 07:00 AM.
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Re: Low Oil Pressure After Oil Filter Change
[Re: TJP]
#2968631
09/29/21 09:58 PM
09/29/21 09:58 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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Not yet. I am currently cleaning/painting the intake and then I will start pulling and cleaning the rocker assemblies. Then I will mark and inspect the lifters. Thank you!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Low Oil Pressure After Oil Filter Change
[Re: TJP]
#2982312
11/06/21 10:18 AM
11/06/21 10:18 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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This is the best picture of that bearing half that I have right now. I will pull the lifters back out and check them with a straight edge.
Thanks!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Low Oil Pressure After Oil Filter Change
[Re: TJP]
#2983030
11/08/21 09:04 AM
11/08/21 09:04 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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I am still thinking out loud as to what else to check before pulling the block. I am still looking for a solid reason for the oil pump/bearing damage.
I have not rechecked the lifters yet, as they are packed away. But they each looked nice and smooth as did the cam lobes when I packed them up.
I checked the crankshaft end play and found it at .022” pulling front to rear. This is not as bad as I would have guessed with the clunk noise that it makes. I know this is out of spec and I will look at the crank thrust surface in the near future.
I checked the gap between the flex-plate and the 727 converter mounting tabs (pushed all the way inward) and the gap measured .160”-.165” at all four tabs.
I am hoping to pickup an engine hoist next week, so in the mean time I am thinking of things to check.
Thanks!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Low Oil Pressure After Oil Filter Change
[Re: TJP]
#2983283
11/08/21 11:11 PM
11/08/21 11:11 PM
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Joined: Aug 2019
Posts: 10,049 Super Spudsville
Mr PotatoHead
Half Baked
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Half Baked
Joined: Aug 2019
Posts: 10,049
Super Spudsville
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Time to build a short block to mach the rest of your combo and one that meets your expectations and one that will live with reg. maintenance.
340 (234/238@.050, .590"/.603") Solid FT, Yella Terra 1.65 rockers, 9.7:1, 63cc Sidewinders (Bowl Ported),RPM intake, QF SS-750 Annular DP, MSD Street Fire Ign., & TTI's. 727/Dynamic 9.5" 3800, TF-2, & 3:91's
STOP POTATO HATE!
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Re: Low Oil Pressure After Oil Filter Change
[Re: TJP]
#2999941
12/30/21 01:49 PM
12/30/21 01:49 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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I have already had the heads apart, cleaned and now reassembled. I have a new oil pump and pickup and the pan has been cleaned and repainted. I am not reusing the crank/rods/pistons. Once it is out of the shop as a rotating assembly, all of the parts have been cleaned/painted and it is ready to go back together.
Thanks!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Low Oil Pressure After Oil Filter Change
[Re: YO7_A66]
#2999953
12/30/21 02:09 PM
12/30/21 02:09 PM
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Joined: Jan 2003
Posts: 18,432 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,432
UPPER MICHIGAN, MARQUETTE COUN...
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I finished taking apart the engine and I am taking the block to the machine shop in two weeks for cleaning and inspection.
As I am still looking for a cause for the oil pump damage, I did find some heavy wear to the thrust side on the crank. It looks like it has been machined down while the engine was running. This debris from the crank could have been what damaged the oil pump. This crank will not be reused.
Note: The piece of material on that bearing surface is just some material that I did not get wiped off at the time of the pictured.
I am going to have the machine shop price me out a rotating assembly for both the 3.79" and 4.00" cranks depending on availability. I already have camshafts spec'd out for both size cranks. Once I know the condition of the block (bores are very smooth with no wear ridge) and I know which crank, then I will get the cam on order while the rotating assembly goes back together.
Thanks for checking in! This was run all the time behind an automatic? If so you could have a ballooned converter. Did you run nitrous?
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Re: Low Oil Pressure After Oil Filter Change
[Re: NITROUSN]
#2999959
12/30/21 02:21 PM
12/30/21 02:21 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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OP
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Indiana
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""This was run all the time behind an automatic? If so you could have a ballooned converter. Did you run nitrous?""
This engine has always run in front of a 727. But I have had three different converters in it over the last 22 years since this motor was last rebuilt. The current converter I was able to spin with no clearance issues to the flex plate. I will be checking the clearance again once the engine goes back in.
No on the nitrous.
Thanks!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Low Oil Pressure After Oil Filter Change
[Re: Mr PotatoHead]
#3091292
11/02/22 10:47 PM
11/02/22 10:47 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
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OP
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""Time to build a short block to match the rest of your combo and one that meets your expectations and one that will live with reg. maintenance.""
A small update:
Back when I finished this thread, I removed the block from the car, and removed everything off of the block (except main caps) and dropped it off to a local performance machine shop that I have used in the past. This shop is small and very busy, but he is finally making progress on my block as of last Friday.
After a cleaning and initial inspection, he is now to the point of ordering forged H-beam Molnar rods/4.00" crank and having to order custom pistons (nothing on the shelf) to assemble a 10.5-10.8 compression rotating assembly (per cam grinder).
I am discussing the cam with Mike Jones to come up with a solid-street roller, and BAM lifters to match my existing 281cfm @ .550" heads and a 420" stroker rotating assembly. This is a 6-6200 rpm build and I will reuse as many parts as I can. It appears to be a SR with .660" lifts after lash. I know that the actual lifts will be smaller due to valve train angles, but I am excited about the new direction of this numbers matching build.
I have been collecting the small parts that I know will be needed and I am starting on the larger parts that may have delivery issues. I have two intakes on hand, one is my RPM that is gasket matched (a lot of material came out of this intake) and a Weiand X-celerator that is about 80% gasket matched to the RPM using the same set of gaskets. I wanted to have both a dual plane and a single plane that were equally gasket matched so that I can bolt on either one at final assembly. I am currently looking at using the RPM since it is a streetcar, so I stopped on finishing the gasket match on the X-celerator. I may get bored waiting on the rotating assembly and finish the Weiand this Fall. But I plan to reuse the ported Sidewinders and the 1.65 Yella Terras for this build. I already have my new retainers and installed heights figured out for the new springs. I have talked with Manton about the spring pressures/rpm’s and the apx pushrod lengths and they have recommended their 11/32” x .120” wall Stage 3 or 5’s for this setup.
Thanks to everyone who helped with the oil pressure issue, as I will have more questions as the street build continues this coming Winter.
D
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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