azzfox
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Heres a run down on how to check the oil pressure relief valve spring length on your VN-VR Buick V6. This is responsible for maintaining the maximum specified oil pressure. As years go by these springs can get weak, causing oil pressure to drop, which isnt a good thing.
Without installing a gauge, I had a fair idea that I had adequate oil pressure because I can safely take it throughout the rev range with no hesitation. Unlike some V6's like our VP wagon where you can hear big end knock at 4000rpm
.
Weve all heard the expression "rod out the block", so heres one way to help prevent that.
1. Remove oil filter and disconnect oil pressure switch wiring.
2. Locate and remove the 4 bolts attaching the oil filter adapter to the timing cover. 1/2" socket from memory. Prepare for some spillage!
3. Remove filter adapter. It should come away with ease with minor spring force behind it. Be careful not to tear the gasket if planning to reuse it.
4. Simply remove the valve and spring from the timing cover.
5. Measure the spring free length from end to end. The minimum specified length for VN is 64.8mm and VP 66.3mm. Mine came in at a healthy 65mm.
6. Re-assemble. All parts should be cleaned with a solvent and dried with compressed air, but I diddnt have either, so a clean rag it was.
7. Reinsert spring and valve back into the timing cover and check for smoothness.
8. Hold the filter adapter against the timing cover and lightly tighten bolts. One bolt is longer which is the one located on the filter base.
9. Once all bolts are snug and filter adapter is square against the timing cover, tighten bolts to 35 Nm (26 lb/ft).
10. Reinstall filter and job done!
Without installing a gauge, I had a fair idea that I had adequate oil pressure because I can safely take it throughout the rev range with no hesitation. Unlike some V6's like our VP wagon where you can hear big end knock at 4000rpm
.Weve all heard the expression "rod out the block", so heres one way to help prevent that.
1. Remove oil filter and disconnect oil pressure switch wiring.
2. Locate and remove the 4 bolts attaching the oil filter adapter to the timing cover. 1/2" socket from memory. Prepare for some spillage!
3. Remove filter adapter. It should come away with ease with minor spring force behind it. Be careful not to tear the gasket if planning to reuse it.
4. Simply remove the valve and spring from the timing cover.
5. Measure the spring free length from end to end. The minimum specified length for VN is 64.8mm and VP 66.3mm. Mine came in at a healthy 65mm.
6. Re-assemble. All parts should be cleaned with a solvent and dried with compressed air, but I diddnt have either, so a clean rag it was.
7. Reinsert spring and valve back into the timing cover and check for smoothness.
8. Hold the filter adapter against the timing cover and lightly tighten bolts. One bolt is longer which is the one located on the filter base.
9. Once all bolts are snug and filter adapter is square against the timing cover, tighten bolts to 35 Nm (26 lb/ft).
10. Reinstall filter and job done!
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