Re: Low Oil Pressure After Oil Filter Change
[Re: Mr PotatoHead]
#2950588
08/05/21 07:07 AM
08/05/21 07:07 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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Thank you Mr. P! As I work my way back out of the pan I will check out those areas.
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]
#2950824
08/05/21 08:22 PM
08/05/21 08:22 PM
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YO7_A66
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I got the pan off and found chunks of gasket material in the pickup and in the pan. I was able to scrape some out of the pickup with my finger tip and there is a piece hanging on in this picture. This does not surprise me since I have made three cam swaps with this pan in place over the years.
My next move is to check the bearings.
Note: The existing pump has a HV tag and has been in this engine for 22+ years but only about 5-7k miles.
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]
#2951324
08/07/21 10:47 AM
08/07/21 10:47 AM
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I pulled the pump and pickup this morning and found no gasket between the block and pump. Is this correct? All the pictures of new pumps show a gasket. I also found the inside of the pickup to have orange and blue gasket material up inside of the pickup screen. I can’t get the pickup removed or get the screws off the pump cover to look inside.
I am feeling a little weenie thinking about pulling any of the main caps. I’ve never done it before and could use some advice. 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: NITROUSN]
#2951384
08/07/21 02:05 PM
08/07/21 02:05 PM
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Will the bearing fall out of the cap?
Do I need to wipe off the oil before applying a piece of the plasti-gage?
Thanks again!
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]
#2951708
08/08/21 03:32 PM
08/08/21 03:32 PM
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I got some time today to pull the oil pump apart and found some damage to rotor and housing. I also dug out some more crud from the screen. I will check back in when I get some time to check the clearances. 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: Sniper]
#2951737
08/08/21 04:05 PM
08/08/21 04:05 PM
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I didn’t pull it apart (I got called in to start the grill), but I will tomorrow. That will be the first item on the list. 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: NITROUSN]
#2951821
08/08/21 06:51 PM
08/08/21 06:51 PM
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Nitro: I have ordered a new pump/pickup and while I am waiting on them to be delivered, I will check the bearings. 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]
#2951969
08/09/21 09:26 AM
08/09/21 09:26 AM
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Joined: Aug 2019
Posts: 9,572 Super Spudsville
Mr PotatoHead
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Waiting to see some bearing pics.
What rocker arms are you running?
To me overall and with the paperwork it looks like a decent build. I wonder if thats a melling pump or the reman version of the hv72?
How hard did you run this motor?
STOP POTATO HATE!
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Re: Low Oil Pressure After Oil Filter Change
[Re: Mr PotatoHead]
#2952014
08/09/21 11:39 AM
08/09/21 11:39 AM
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Mr P: I hope to get time to look at the bearings this week.
I run Yella Terra 1.65 rockers for about 5 years now on two different sets of heads.
I had not run the motor hard since the cam swap over the Winter. I had put about 4 hours of cruising time on the new cam/lifters and then I changed the break-in oil over to 10W-40. On that first drive on the 10W-40 is when I noticed the oil pressure change during the drive. I just got done with a half throttle hit and then came to a stop sign and I noticed the oil pressure going down. I was actually getting ready to make a WOT hit and that is when I looked at the guage. I slowly made it back to the garage with no extra engine noise. The gauge was showing 25'ish while cruising back to the garage. Ever since this time I have been showing 38'ish on cold startup and then it creeped down to 10 or less at warm idle. Then I started pulling it apart.
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]
#2952166
08/09/21 07:40 PM
08/09/21 07:40 PM
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Joined: Jan 2003
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No crud found in relief valve of oil pump. The valve needed a little persuasion to come out though. It seemed stuck.
First bearing cap: please let me know.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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