Engine and Transmission Tech
tips, technology, tools and techniques related to vehicle driveline components
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Scott, those valves are rare, but TA has slightly larger 64 300 IN valves and 65-67 300 EX valves that will work for the stock seats. They use stock 11 degree keepers and my guess is your beehive springs have 10 degree retainers. Jon's motor had 7 degree retainers and we couldn't get them off and went to Z28/LT1 springs and Comp Cams 11 degree retainers. You want him to cut the guides for Viton seals and leave the little coil springs off the exhaust seals. We also used bronze valve guide liners.
Edited 1 time(s). Last edit at 06/26/2025 12:14PM by mgb260. |
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
TA shows both the stock valves for 215 and the 300 version. They don't stock them and cant give an estimate on delivery due to the back order status. I’m surprised that everything else is available but the valves are scarce.
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
The 300 valves are .095 longer than the 215 and you would need different pushrods. Olds 215 IN valve is same as Buick 215 but EX is larger than 64 300 but smaller than 65-67 300.
Edited 2 time(s). Last edit at 06/26/2025 12:52PM by mgb260. |
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Another alternative is new valve seats for your valves. Alex's Part's has them and your machinist would know what size he would need:
[alexsparts.com] |
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Egge Machine Co may have new valves but will be expensive. Their website seems to be down.
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Meaning keep the existing valves?
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
If new seats would help. You have to ask the machinist.
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Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
How goes ? If not done, use $50. 3.5 block. quick hone, assemble, run. Happy ever after.
Art |
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Will Rover 3.5 valves work? They are available thru The wedge Shop. Their listing states they work on all of the rover variants.
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
They are the same as the Buick 215 and may on the IN, but the Olds EX valves are larger diameter. Ask your machinist maybe new IN valves and new seats for the EX. Rimmer would have the best prices on IN valves. Call Egge Machine Co on EX valves?
[rimmerbros.com] [www.allbiz.com] Edited 2 time(s). Last edit at 06/26/2025 02:02PM by mgb260. |
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Egge machine has a few valves, not a complete set. But, they manufacture valves and can do that for approx $500. Could take a month to get those. That’s an option but not a cheap one. Rimmer Bros website sucks and the’re closed so dont know what they can provide. TWS are suppose to call me back, but it looks like they’ll have the intake ones.
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
My link above shows Rimmer IN valves for 3.5 Rover @ $11.70 each where Egge and the Wedge shop are around $30 each. Here it is again:
[rimmerbros.com] Larger than stock EX: [rimmerbros.com] Larger than stock IN: [rimmerbros.com] If it was me, I'd get the larger IN and EX which are the biggest you can go with the stock seats. Basically 300 Buick diameters. Edited 4 time(s). Last edit at 06/26/2025 02:59PM by mgb260. |
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BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6579 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Sometimes it's possible to find a valve that uses different keepers or is long enough to trim to length and cut new keeper grooves. Likely to be a more expensive option but sometimes not. Something to keep in mind.
Jim |
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
The valve tips are not the same as mine. Machinist says they wont work.
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
This is the other one, obviously one is in and the other ex.
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
The intake has the double grooves. Unfortunately we don't know where these valves came from.
Edited 1 time(s). Last edit at 06/26/2025 03:15PM by Gswest236. |
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
Definitely not stock, stock would be the same as Rover. .Have him measure the head diameters. Olds stock are around 1.50 IN and 1,36 EX. The rover valves will work with the right 11 degree keepers and retainers like Jon used, If the head diameters are larger than stock you can use new larger seats and 1.74 IN and 1.5 EX from Ford 2.3 SOHC Pinto like I did years ago on 300 heads .Jim B, it is hard to find other valves unless you go larger.
Edited 2 time(s). Last edit at 06/27/2025 02:59PM by mgb260. |
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Gswest236 Scott West Seabeck, Washington (174 posts) Registered: 07/14/2021 09:13PM Main British Car: 1974.5 MGBGT V8 Olds 215 Stroked to 266 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
John said the intake head diameter is 40mm or 1.575’
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mgb260 Jim Nichols Sequim,WA (2632 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.
An article on here used these valves and seats:
Pontiac Iron Duke four 1.72 IN and Manley P/N 11667-4 Volkswagen 38mm (1.496) stainless steel EX valves. The larger valves will require new seats, such as Precision PC1500-31 (exhaust) and PC1750-39 (intake), I'll look them up and see if the keeper slots match. Hard telling what previous owner did. Edited 2 time(s). Last edit at 06/26/2025 04:39PM by mgb260. |
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