31/08/2026
We had this Astra Gtc Vxr dropped off with a real nasty rattle , the customer said he’d had the chains & waterpump done less than a 1000miles ago but was concerned it was rattling and knocking and asked if we’d take a look and forge it ..
Initial strip down revealed the cause of the rattle and it wasn’t good , chains had been done using genuine gm parts but they’d forgot to activate the main chain tensioner leaving the chain so slack, it had chewed its way thru the top guide , the front and rear chain guide bolts had sheared off and the chain had eaten into the block causing irreparable damage .
After speaking to the customer at this point we used a good used block and sent it to the machine shop along with the crank and head for the full works and tolerance checks
Wiseco pistons , zrp rods ,arp rod bolts , king race bearings , new gm chains and guides ,Pierburg waterpump along with the full victor reinz headgasket set and all associated bolts etc .
The flywheel was replaced due to severe wear
Fresh shell helix oil and filter
Millers gearbox oil
And she’s now back to running like a dream ..
3 week turnaround on this one and another happy customer !
Drop us a message for all your Gtc Vxr / z20 / corsa Vxr needs and don’t forget to check out our insignia Vxr raffle below ⬇️⬇️⬇️