With new Crane pedestal mount 1.6 roller rockers on AFR165s, can I reuse the stock 93 cobra rocker arm bolts (from the Crane/Ford 1.72s)?
They appear to be similar length and there’s no free play when mocked up. The bolts that cam with the new Crane RRs appear to be a different thread count than the stock bolts and won’t start in the AFR heads...
Setup: ‘93 302 (126k miles but at some point was refreshed with new rings/bearings by the previous owner who was a BMW mechanic) new TFS1 cam, new FMS roller lifters (HD), stock pushrods (I believe), new crane pedestal mount 1.6 roller rockers, new double
roller timing chain and a new H2O pump.
The car already has AFR165s, TFS track heat intake, 75mm accufab TB, 73mm C&L MAF, 1 5/8” ceramic coated BBK LTs...
What started this new valve train project was a leaking timing chain cover gasket. The car had the stock valvetrain on the AFRs under the TFS intake, so I thought I’d replace the cam / lifters / chain while there. Half way through I thought to get new RRs so as to not push the AFR recommended .550” max lift with the 1.72s so I bought these 1.6s.
Why would Crane make a pedestal mount RR kit with bolts that won’t work on these heads that took the stock SVT hardware fine? My guess is that the kit is for a GT 302 and the Cobras had different bolts on the GT40 heads for the 1.72 RRs.
Has anyone else done this same thing, reusing the 1.72 bolts on new 1.6 RRs?
Lastly, here’s the 1.6RR roller pin wear on the AFR valve stems with the old bolts. It appears all is ok...
They appear to be similar length and there’s no free play when mocked up. The bolts that cam with the new Crane RRs appear to be a different thread count than the stock bolts and won’t start in the AFR heads...
Setup: ‘93 302 (126k miles but at some point was refreshed with new rings/bearings by the previous owner who was a BMW mechanic) new TFS1 cam, new FMS roller lifters (HD), stock pushrods (I believe), new crane pedestal mount 1.6 roller rockers, new double
roller timing chain and a new H2O pump.
The car already has AFR165s, TFS track heat intake, 75mm accufab TB, 73mm C&L MAF, 1 5/8” ceramic coated BBK LTs...
What started this new valve train project was a leaking timing chain cover gasket. The car had the stock valvetrain on the AFRs under the TFS intake, so I thought I’d replace the cam / lifters / chain while there. Half way through I thought to get new RRs so as to not push the AFR recommended .550” max lift with the 1.72s so I bought these 1.6s.
Why would Crane make a pedestal mount RR kit with bolts that won’t work on these heads that took the stock SVT hardware fine? My guess is that the kit is for a GT 302 and the Cobras had different bolts on the GT40 heads for the 1.72 RRs.
Has anyone else done this same thing, reusing the 1.72 bolts on new 1.6 RRs?
Lastly, here’s the 1.6RR roller pin wear on the AFR valve stems with the old bolts. It appears all is ok...