Posts: 169
From the Bosch (USA) website below 3421 is not listed for Delorean. There is a difference between them on the relief valve P.S.I.
Vehicles compatible with : Premium Oil Filters : 3421
https://www.boschautoparts.com/en/ym...0Oil%20Filters
Specs for 3421:
Part Number:
3421
Anti-Drain Back Valve: Yes
Connection Size: 3/4-16
Filtering Material: Cellulose Paper
Gasket Material: Nitrile
Inner Diameter Bottom: 0
Non Slip Grip: No
Oil Filter Height (in): 4.74 in
Oil Filter Type: Spin-On/Canister
Relief Valve P.S.I.: 25-35
Removal Nut: No
3402 is listed as compatible for Delorean
Vehicles compatible with : Premium Oil Filters : 3402
https://www.boschautoparts.com/en/ym...0Oil%20Filters
Specs for 3402:
Part Number:
3402
Anti-Drain Back Valve: Yes
Connection Size: 3/4-16
Filtering Material: Cellulose Paper
Gasket Material: Nitrile
Inner Diameter Bottom: 0
Non Slip Grip: No
Oil Filter Height (in): 3.75 in
Oil Filter Type: Spin-On/Canister
Relief Valve P.S.I.: 8-16
Removal Nut: No
hmm wish i knew this the other day.
anyways, i drained the system, got the drain plug tool at pepboys.
i put the 3421 filter on. started it up and sounded great!!!!!!!
fast fwd 5minutes plus, the sound was back in full force.
im stumped.
dunno why it would sound great at start up then faulter again.
Thanks guys. I stand corrected. With a relief valve at 8-16 psi, the filter must be bypassed more often than not.
Wow, that's weird. Perhaps that behavior is related to thicker oil at startup providing more lubrication, then as the engine warms up the oil gets thinner. Perhaps your oil pump is failing or the blockage as mentioned. It's anybody's guess. Regardless, as Dan said above, I think you need to have it inspected immediately without trying to drive it anymore. When whoever has the offending valve cover off, I think the cause will be apparent.
If you'd like, you can PM your address, and I can send you my spare DMC oil filter and crush washer. Then you'll know for sure you have the right one.
Dana
1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
1985 Chevrolet Corvette, Z51, 4+3 manual
2006 Dodge Magnum R/T (D/D)
2010 Camaro SS (Transformers Edition)
Location: Florida: Pinellas County
Posts: 2,111
My VIN: 5003 Never placed Concourse
Club(s): (DCF)
This engine takes a lot of oil. How much did you put in to begin with? If it’s reading on the stick and you put in 7 qts, good luck with that!
-----Dan B.
Location: Florida: Pinellas County
Posts: 2,111
My VIN: 5003 Never placed Concourse
Club(s): (DCF)
So 14 qts total...?
-----Dan B.